/* ============================================================
   Roney Lima — Professional Portfolio
   Premium Mintlify-Inspired Design System
   ============================================================ */

/* ── Fonts ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=Geist+Mono:wght@400;500&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* ── Color Palette (Strict Mintlify Design System Mode) ── */
  --color-primary:                  #0a0a0a;
  --color-on-primary:               #ffffff;
  --color-brand-green:              #00d4a4;
  --color-brand-green-deep:         #00b48a;
  --color-brand-green-soft:         #7cebcb;
  --color-brand-tag:                #3772cf;
  --color-brand-warn:               #c37d0d;
  --color-brand-annotate:           #1ba673;
  --color-brand-error:              #d45656;
  --color-brand-cursor:             #888888;
  --color-hero-sky-from:            #87a8c8;
  --color-hero-sky-to:              #f5e9d8;
  --color-hero-dark-from:           #1a3d4a;
  --color-hero-dark-to:             #2d5a4f;
  --color-testimonial-orange:       #f55a3c;
  --color-testimonial-orange-deep:  #cc3a1f;
  --color-canvas:                   #ffffff;
  --color-canvas-dark:              #0a0a0a;
  --color-surface:                  #f7f7f7;
  --color-surface-soft:             #fafafa;
  --color-surface-code:             #1c1c1e;
  --color-hairline:                 #e5e5e5;
  --color-hairline-soft:            #ededed;
  --color-hairline-dark:            #1f1f1f;
  --color-ink:                      #0a0a0a;
  --color-charcoal:                 #1c1c1e;
  --color-slate:                    #3a3a3c;
  --color-steel:                    #5a5a5c;
  --color-stone:                    #888888;
  --color-muted:                    #a8a8aa;
  --color-on-dark:                  #ffffff;
  --color-on-dark-muted:            #b3b3b3;

  /* ── Typography ── */
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono:  'Geist Mono', 'SF Mono', 'Fira Code', monospace;

  --fs-hero-display: clamp(40px, 8vw + 1rem, 72px);
  --fw-hero-display: 700;
  --lh-hero-display: 1.05;
  --ls-hero-display: -2px;

  --fs-display-lg: clamp(32px, 6vw + 1rem, 64px);
  --fw-display-lg: 700;
  --lh-display-lg: 1.10;
  --ls-display-lg: -1.5px;

  --fs-h1: clamp(28px, 4vw + 1rem, 48px);
  --fw-h1: 700;
  --lh-h1: 1.10;
  --ls-h1: -1px;

  --fs-h2: clamp(24px, 3vw + 1rem, 36px);
  --fw-h2: 600;
  --lh-h2: 1.20;
  --ls-h2: -0.5px;

  --fs-h3: clamp(20px, 2vw + 1rem, 28px);
  --fw-h3: 600;
  --lh-h3: 1.25;

  --fs-h4: 18px;
  --fw-h4: 600;
  --lh-h4: 1.30;

  --fs-h5: 16px;
  --fw-h5: 600;
  --lh-h5: 1.40;

  --fs-subtitle: 18px;
  --fw-subtitle: 400;
  --lh-subtitle: 1.50;

  --fs-body-md: 16px;
  --fw-body-md: 400;
  --lh-body-md: 1.50;

  --fs-body-sm: 14px;
  --fw-body-sm: 400;
  --lh-body-sm: 1.50;

  --fs-button-md: 14px;
  --fw-button-md: 500;
  --lh-button-md: 1.30;

  --fs-caption: 13px;
  --fw-caption: 400;
  --lh-caption: 1.40;

  --fs-micro: 11px;
  --fw-micro: 600;
  --lh-micro: 1.40;
  --ls-micro: 0.5px;

  /* ── Spacing ── */
  --sp-xxs:        4px;
  --sp-xs:         8px;
  --sp-sm:        12px;
  --sp-md:        16px;
  --sp-lg:        20px;
  --sp-xl:        24px;
  --sp-xxl:       32px;
  --sp-xxxl:      40px;
  --sp-section-sm: 48px;
  --sp-section:    64px;
  --sp-section-lg: 96px;
  --sp-hero:      120px;

  /* ── Rounded ── */
  --rd-xs:   4px;
  --rd-sm:   6px;
  --rd-md:   8px;
  --rd-lg:  12px;
  --rd-xl:  16px;
  --rd-xxl: 24px;
  --rd-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm:    0 1px 2px rgba(0,0,0,0.02), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md:    0 4px 12px rgba(0,0,0,0.04), 0 2px 6px rgba(0,0,0,0.02);
  --shadow-lg:    0 8px 30px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.02);
  --shadow-xl:    0 16px 48px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 12px 36px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.03);
  --shadow-glow-green: 0 0 20px rgba(0,212,164,0.12), 0 0 40px rgba(0,212,164,0.06);

  /* ── Transitions ── */
  --ease-out:     cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 350ms;

  /* ── Layout ── */
  --container-max: 1280px;
  --gutter:        32px;
  --nav-height:    64px;
}

/* ── Dark Mode Tokens ──────────────────────────────────────── */
[data-theme='dark'] {
  --color-canvas:       #090e0c;
  --color-surface:      #101915;
  --color-surface-soft: #14201b;
  --color-hairline:     #1d2c26;
  --color-hairline-soft:#15221d;
  --color-ink:          #ecf3f0;
  --color-charcoal:     #d4e3dd;
  --color-slate:        #a3b8b0;
  --color-steel:        #7e948c;
  --color-stone:        #5d736b;
  --color-muted:        #42554f;
  --color-primary:      #ecf3f0;
  --color-on-primary:   #090e0c;

  --shadow-sm:    0 1px 2px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.22);
  --shadow-md:    0 4px 12px rgba(0,0,0,0.22), 0 2px 6px rgba(0,0,0,0.15);
  --shadow-lg:    0 8px 30px rgba(0,0,0,0.28), 0 4px 12px rgba(0,0,0,0.15);
  --shadow-xl:    0 16px 48px rgba(0,0,0,0.32), 0 8px 24px rgba(0,0,0,0.20);
  --shadow-card-hover: 0 12px 36px rgba(0,0,0,0.32), 0 4px 12px rgba(0,0,0,0.20);
  --shadow-glow-green: 0 0 24px rgba(0,212,164,0.18), 0 0 48px rgba(0,212,164,0.08);
}

/* ── Reset & Base ──────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body-md);
  font-weight: var(--fw-body-md);
  line-height: var(--lh-body-md);
  color: var(--color-ink);
  background-color: var(--color-canvas);
  transition:
    background-color var(--duration-slow) var(--ease-out),
    color var(--duration-slow) var(--ease-out);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6,
.hero-display, .display-lg, .heading-1, .heading-2, .heading-3, .heading-4, .heading-5,
.nav-logo, .nav-link, .nav-mobile-link, .btn, .stack-category-title, .timeline-year, .timeline-title {
  font-family: var(--font-display);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

::selection {
  background-color: var(--color-brand-green);
  color: var(--color-primary);
}

/* ── Utility: Container ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ── Utility: Section Spacing ──────────────────────────────── */
.section {
  padding-top: var(--sp-section-lg);
  padding-bottom: var(--sp-section-lg);
}

.section + .section {
  padding-top: 0;
}

/* ── Utility: Section Label ────────────────────────────────── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  line-height: var(--lh-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
  color: var(--color-brand-green);
  margin-bottom: var(--sp-lg);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--rd-full);
  background-color: var(--color-brand-green);
  flex-shrink: 0;
}

/* ── Typography Utilities ──────────────────────────────────── */
.hero-display {
  font-size: var(--fs-hero-display);
  font-weight: var(--fw-hero-display);
  line-height: var(--lh-hero-display);
  letter-spacing: var(--ls-hero-display);
  color: var(--color-ink);
}

.display-lg {
  font-size: var(--fs-display-lg);
  font-weight: var(--fw-display-lg);
  line-height: var(--lh-display-lg);
  letter-spacing: var(--ls-display-lg);
}

.heading-1 {
  font-size: var(--fs-h1);
  font-weight: var(--fw-h1);
  line-height: var(--lh-h1);
  letter-spacing: var(--ls-h1);
}

.heading-2 {
  font-size: var(--fs-h2);
  font-weight: var(--fw-h2);
  line-height: var(--lh-h2);
  letter-spacing: var(--ls-h2);
}

.heading-3 {
  font-size: var(--fs-h3);
  font-weight: var(--fw-h3);
  line-height: var(--lh-h3);
}

.heading-4 {
  font-size: var(--fs-h4);
  font-weight: var(--fw-h4);
  line-height: var(--lh-h4);
}

.heading-5 {
  font-size: var(--fs-h5);
  font-weight: var(--fw-h5);
  line-height: var(--lh-h5);
}

.subtitle {
  font-size: var(--fs-subtitle);
  font-weight: var(--fw-subtitle);
  line-height: var(--lh-subtitle);
  color: var(--color-slate);
}

.body-md {
  font-size: var(--fs-body-md);
  font-weight: var(--fw-body-md);
  line-height: var(--lh-body-md);
}

.body-sm {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-body-sm);
  line-height: var(--lh-body-sm);
}

.caption {
  font-size: var(--fs-caption);
  font-weight: var(--fw-caption);
  line-height: var(--lh-caption);
}

.mono {
  font-family: var(--font-mono);
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-xs);
  padding: 10px 20px;
  border-radius: var(--rd-full);
  font-size: var(--fs-button-md);
  font-weight: var(--fw-button-md);
  line-height: var(--lh-button-md);
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
  background: linear-gradient(135deg, rgba(255,255,255,0.12), transparent);
}

.btn:hover::after {
  opacity: 1;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary: Black pill */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Accent Green */
.btn-accent {
  background-color: var(--color-brand-green);
  color: var(--color-canvas-dark);
  border-color: var(--color-brand-green);
}

.btn-accent:hover {
  background-color: var(--color-brand-green-deep);
  border-color: var(--color-brand-green-deep);
  box-shadow: var(--shadow-glow-green);
  transform: translateY(-1px);
}

/* Secondary: Transparent + border */
.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-hairline);
}

.btn-secondary:hover {
  border-color: var(--color-stone);
  background-color: var(--color-surface);
  transform: translateY(-1px);
}

/* Ghost: No border, just text */
.btn-ghost {
  background-color: transparent;
  color: var(--color-slate);
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--color-ink);
  background-color: var(--color-surface);
}

/* Large button variant */
.btn-lg {
  padding: 14px 28px;
  font-size: 15px;
}

/* Small button variant */
.btn-sm {
  padding: 6px 14px;
  font-size: var(--fs-caption);
}

/* Icon-only button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--rd-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

/* ── Badges ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xxs);
  padding: 4px 10px;
  border-radius: var(--rd-full);
  font-size: var(--fs-caption);
  font-weight: 500;
  line-height: var(--lh-caption);
  white-space: nowrap;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

/* Green badge */
.badge-green {
  background-color: rgba(0, 212, 164, 0.10);
  color: var(--color-brand-green-deep);
  border: 1px solid rgba(0, 212, 164, 0.20);
}

[data-theme='dark'] .badge-green {
  background-color: rgba(0, 212, 164, 0.12);
  color: var(--color-brand-green);
  border-color: rgba(0, 212, 164, 0.25);
}

/* Tech badge */
.badge-tech {
  background-color: var(--color-surface);
  color: var(--color-slate);
  border: 1px solid var(--color-hairline);
}

.badge-tech:hover {
  border-color: var(--color-brand-green);
  color: var(--color-ink);
  background-color: rgba(0, 212, 164, 0.06);
}

[data-theme='dark'] .badge-tech {
  background-color: var(--color-surface);
  border-color: var(--color-hairline);
}

/* Status badge */
.badge-status {
  padding: 3px 10px;
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
}

.badge-status[data-status='estudando'] {
  background-color: rgba(55, 114, 207, 0.10);
  color: var(--color-brand-tag);
  border: 1px solid rgba(55, 114, 207, 0.20);
}

.badge-status[data-status='experimentando'] {
  background-color: rgba(0, 212, 164, 0.10);
  color: var(--color-brand-green-deep);
  border: 1px solid rgba(0, 212, 164, 0.20);
}

.badge-status[data-status='aplicando'] {
  background-color: rgba(245, 90, 60, 0.10);
  color: var(--color-testimonial-orange);
  border: 1px solid rgba(245, 90, 60, 0.20);
}

.badge-status[data-status='concluido'],
.badge-status[data-status='concluído'] {
  background-color: rgba(0, 180, 138, 0.10);
  color: var(--color-brand-green-deep);
  border: 1px solid rgba(0, 180, 138, 0.20);
}

/* Brand tag badge */
.badge-tag {
  background-color: rgba(55, 114, 207, 0.10);
  color: var(--color-brand-tag);
  border: 1px solid rgba(55, 114, 207, 0.20);
}

/* Category badge for articles */
.badge-category {
  background-color: var(--color-surface);
  color: var(--color-steel);
  border: 1px solid var(--color-hairline-soft);
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rd-lg);
  padding: var(--sp-xl);
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    background-color var(--duration-slow) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-hairline-soft);
}

[data-theme='dark'] .card {
  background-color: var(--color-surface);
  border-color: var(--color-hairline);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(28, 28, 30, 0.80);
}

[data-theme='dark'] .card:hover {
  border-color: rgba(0, 212, 164, 0.20);
  background-color: rgba(28, 28, 30, 0.92);
}

.card-feature {
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline-soft);
  border-radius: var(--rd-lg);
  padding: var(--sp-xxl);
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    background-color var(--duration-slow) var(--ease-out);
}

.card-feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

[data-theme='dark'] .card-feature {
  background-color: rgba(28, 28, 30, 0.60);
  border-color: var(--color-hairline);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

[data-theme='dark'] .card-feature:hover {
  border-color: rgba(0, 212, 164, 0.15);
  background-color: rgba(28, 28, 30, 0.85);
}

/* ── Card Icon Container ── */
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--rd-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-md);
  transition: background-color var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out);
  flex-shrink: 0;
}

.card-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-brand-green);
}

.card:hover .card-icon,
.card-feature:hover .card-icon {
  background-color: rgba(0, 212, 164, 0.08);
  border-color: rgba(0, 212, 164, 0.20);
}

[data-theme='dark'] .card-icon {
  background-color: rgba(0, 212, 164, 0.08);
  border-color: var(--color-hairline);
}

/* ── Card Content Helpers ── */
.card-title {
  font-size: var(--fs-h5);
  font-weight: var(--fw-h5);
  line-height: var(--lh-h5);
  color: var(--color-ink);
  margin-bottom: var(--sp-xs);
}

.card-description {
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body-sm);
  color: var(--color-steel);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
  margin-top: var(--sp-md);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xxs);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  color: var(--color-brand-green);
  margin-top: var(--sp-md);
  transition: gap var(--duration-fast) var(--ease-out);
}

.card-link:hover {
  gap: var(--sp-xs);
  color: var(--color-brand-green-deep);
}

.card-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.card:hover .card-link svg {
  transform: translateX(2px);
}

/* ============================================================
   1. NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition:
    background-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    backdrop-filter var(--duration-base) var(--ease-out);
}

.nav.scrolled {
  background-color: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 1px 0 var(--color-hairline);
}

[data-theme='dark'] .nav.scrolled {
  background-color: rgba(10, 10, 10, 0.82);
  box-shadow: 0 1px 0 var(--color-hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  font-size: var(--fs-h5);
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.3px;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-logo:hover {
  color: var(--color-brand-green);
}

.nav-logo span {
  color: var(--color-brand-green);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-xxs);
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--rd-full);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  color: var(--color-steel);
  transition:
    color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-ink);
  background-color: var(--color-surface);
}

[data-theme='dark'] .nav-link:hover,
[data-theme='dark'] .nav-link.active {
  background-color: var(--color-surface);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--rd-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
  color: var(--color-steel);
  position: relative;
}

.theme-toggle:hover {
  background-color: var(--color-surface);
  color: var(--color-ink);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-base) var(--ease-spring);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition:
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-spring);
}

.theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme='dark'] .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme='dark'] .theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Mobile Menu Toggle */
.nav-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--rd-full);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-steel);
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.nav-menu-toggle:hover {
  background-color: var(--color-surface);
  color: var(--color-ink);
}

.nav-menu-toggle svg {
  width: 20px;
  height: 20px;
}

/* Mobile Nav Overlay */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: rgba(0, 0, 0, 0.40);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.nav-mobile.open {
  opacity: 1;
}

.nav-mobile-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 100%;
  background-color: var(--color-canvas);
  padding: var(--sp-xxl);
  padding-top: calc(var(--nav-height) + var(--sp-xl));
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  box-shadow: var(--shadow-xl);
  overflow-y: auto;
}

.nav-mobile.open .nav-mobile-panel {
  transform: translateX(0);
}

[data-theme='dark'] .nav-mobile-panel {
  background-color: var(--color-surface);
}

.nav-mobile-link {
  display: block;
  padding: var(--sp-sm) 0;
  font-size: var(--fs-subtitle);
  font-weight: 500;
  color: var(--color-steel);
  border-bottom: 1px solid var(--color-hairline-soft);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-mobile-link:hover {
  color: var(--color-ink);
}

/* ============================================================
   2. HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

/* Atmospheric gradient background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(
      160deg,
      var(--color-hero-sky-from) 0%,
      var(--color-hero-sky-to) 50%,
      var(--color-canvas) 100%
    );
  transition: background var(--duration-slow) var(--ease-out);
}

[data-theme='dark'] .hero-bg {
  background:
    linear-gradient(
      160deg,
      var(--color-hero-dark-from) 0%,
      var(--color-hero-dark-to) 40%,
      var(--color-canvas) 100%
    );
}

/* Subtle noise/grain texture overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  pointer-events: none;
}

/* Soft radial glow */
.hero-bg::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 212, 164, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
  animation: hero-glow 8s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  0%   { opacity: 0.3; transform: scale(1) translate(0, 0); }
  100% { opacity: 0.6; transform: scale(1.1) translate(2%, -3%); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-section);
  align-items: center;
  width: 100%;
}

.hero-content {
  max-width: 600px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  padding: 6px 14px;
  border-radius: var(--rd-full);
  background-color: rgba(0, 212, 164, 0.10);
  border: 1px solid rgba(0, 212, 164, 0.20);
  font-size: var(--fs-caption);
  font-weight: 500;
  color: var(--color-brand-green-deep);
  margin-bottom: var(--sp-xl);
  animation: fadeInUp 0.6s var(--ease-out) 0.1s both;
}

[data-theme='dark'] .hero-eyebrow {
  color: var(--color-brand-green);
  background-color: rgba(0, 212, 164, 0.12);
  border-color: rgba(0, 212, 164, 0.25);
}

.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--rd-full);
  background-color: var(--color-brand-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.85); }
}

.hero-title {
  font-size: var(--fs-display-lg);
  font-weight: var(--fw-hero-display);
  line-height: var(--lh-hero-display);
  letter-spacing: var(--ls-hero-display);
  color: var(--color-ink);
  margin-bottom: var(--sp-xl);
  animation: fadeInUp 0.6s var(--ease-out) 0.2s both;
}

.hero-title-prefix {
  font-weight: 300;
  color: var(--color-charcoal);
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-brand-green), var(--color-brand-green-deep));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-roles {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
  margin-bottom: var(--sp-xl);
  animation: fadeInUp 0.6s var(--ease-out) 0.25s both;
}

.hero-role-item {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--color-slate);
  line-height: 1.25;
}

.hero-role-item .role-dot {
  color: var(--color-brand-green-deep);
  font-weight: 700;
  font-size: 1.1em;
}

[data-theme='dark'] .hero-role-item .role-dot {
  color: var(--color-brand-green);
}

.hero-role-item .badge-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  padding: 3px 8px;
  margin-left: var(--sp-xxs);
  text-transform: uppercase;
}

.hero-subtitle {
  font-size: var(--fs-subtitle);
  font-weight: var(--fw-subtitle);
  line-height: var(--lh-subtitle);
  color: var(--color-primary);
  max-width: 520px;
  margin-bottom: var(--sp-xxl);
  animation: fadeInUp 0.6s var(--ease-out) 0.3s both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  animation: fadeInUp 0.6s var(--ease-out) 0.4s both;
}

/* Hero Illustration */
.hero-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInUp 0.8s var(--ease-out) 0.5s both;
}

.hero-portrait-glow {
  position: absolute;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, var(--color-brand-green) 0%, transparent 60%);
  opacity: 0.15;
  filter: blur(40px);
  border-radius: 50%;
  bottom: 10%;
  animation: hero-glow 8s ease-in-out infinite alternate;
}

[data-theme='dark'] .hero-portrait-glow {
  opacity: 0.12;
}

.hero-portrait-img {
  position: relative;
  z-index: 2;
  max-width: 100%;
  height: 100%;
  max-height: 700px;
  object-fit: contain;
  object-position: bottom;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));
}

.hero-illustration svg {
  width: 100%;
  max-width: 480px;
  height: auto;
}

/* Neural network nodes pulse */
.hero-illustration .node {
  animation: neural-pulse 3s ease-in-out infinite;
}

.hero-illustration .node:nth-child(2n) {
  animation-delay: 0.5s;
}

.hero-illustration .node:nth-child(3n) {
  animation-delay: 1s;
}

@keyframes neural-pulse {
  0%, 100% { opacity: 0.6; r: 4; }
  50%      { opacity: 1; r: 6; }
}

.hero-illustration .edge {
  animation: edge-flow 4s ease-in-out infinite;
}

@keyframes edge-flow {
  0%, 100% { opacity: 0.15; stroke-dashoffset: 0; }
  50%      { opacity: 0.40; stroke-dashoffset: 20; }
}

/* Hero scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: var(--sp-xxl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-xs);
  color: var(--color-muted);
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
  animation: fadeInUp 0.6s var(--ease-out) 0.8s both;
}

.hero-scroll-indicator .scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-muted), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { scaleY: 1; opacity: 1; }
  50%      { scaleY: 0.5; opacity: 0.3; }
}

/* ============================================================
   3. ABOUT
   ============================================================ */
#sobre {
  background-color: var(--color-canvas);
  transition: background-color var(--duration-slow) var(--ease-out), border-color var(--duration-slow) var(--ease-out);
  position: relative;
  overflow: hidden;
}

#sobre.state-3 {
  background-color: var(--color-surface);
}

.sobre-content-block {
  display: none;
  opacity: 0;
}

.sobre-content-block.active {
  display: block;
  animation: blockFadeIn 0.5s var(--ease-out) forwards;
}

@keyframes blockFadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sobre-text-wrapper {
  max-width: 960px; /* Expanded text block width */
  margin-left: 0;   /* Left-aligned to match section header */
  margin-right: auto;
}

.sobre-headline {
  font-size: clamp(20px, 2.5vw + 1rem, 28px);
  font-weight: 600;
  line-height: 1.40;
  color: var(--color-ink);
  margin-bottom: var(--sp-xl);
}

.sobre-prose p {
  font-size: var(--fs-subtitle);
  line-height: 1.75;
  color: var(--color-slate);
}

.sobre-prose p + p {
  margin-top: var(--sp-xl);
}

.sobre-prose strong {
  color: var(--color-ink);
  font-weight: 600;
}

.sobre-actions {
  margin-top: var(--sp-xxl);
}

.sobre-actions.button-group {
  display: flex;
  gap: var(--sp-md);
  justify-content: flex-start;
}

.about-section-layout {
  display: grid;
  grid-template-columns: 1.2fr 2.8fr; /* 30% spacer, 70% text on mobile */
  gap: var(--sp-md);
  align-items: center;
}

@media (min-width: 1024px) {
  .about-section-layout {
    grid-template-columns: 1.4fr 2.6fr; /* 35% spacer, 65% text on desktop - expands text space and lines */
    gap: var(--sp-section-lg);
    align-items: center;
  }
}

.about-photo-spacer {
  display: block;
  height: 1px;
}

/* Photo wrapper absolute on the left edge */
.about-section-photo-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 35%; /* Desktop width (smaller size as requested) */
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  display: none;
  opacity: 0;
}

@media (max-width: 1023px) {
  .about-section-photo-wrapper {
    width: 30%; /* Mobile/tablet width */
  }
}

@media (max-width: 767px) {
  .sobre-section.state-3 .about-section-photo-wrapper {
    display: none;
  }
  .about-photo-spacer {
    display: none;
  }
  .about-section-layout {
    grid-template-columns: 1fr;
  }
}

.sobre-section.state-3 .about-section-photo-wrapper {
  display: block;
  opacity: 1;
  animation: photoFadeIn 0.6s var(--ease-out) forwards;
}

@keyframes photoFadeIn {
  from {
    opacity: 0;
    transform: translateX(-15px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.about-section-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center; /* Keep subject face centered and fully visible */
  display: block;
  mask-image: linear-gradient(to right, #000 78%, transparent 100%); /* Fades late so center face is 100% visible */
  -webkit-mask-image: linear-gradient(to right, #000 78%, transparent 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--sp-section);
  align-items: start;
}

.about-text {
  font-size: var(--fs-subtitle);
  line-height: 1.70;
  color: var(--color-slate);
}

.about-text p + p {
  margin-top: var(--sp-lg);
}

.about-text strong {
  color: var(--color-ink);
  font-weight: 600;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.about-highlight {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  padding: var(--sp-lg);
  border-radius: var(--rd-lg);
  background-color: var(--color-hairline-soft);
  border: 1px solid var(--color-hairline);
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.about-highlight:hover {
  transform: translateX(4px);
  border-color: var(--color-brand-green);
}

.about-highlight-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--rd-md);
  background: linear-gradient(135deg, rgba(0,212,164,0.12), rgba(0,212,164,0.04));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-highlight-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-brand-green);
}

.about-highlight-text .label {
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 2px;
}

.about-highlight-text .value {
  font-size: var(--fs-body-md);
  font-weight: 600;
  color: var(--color-ink);
}

/* ============================================================
   4. WHAT I DO — Services Grid
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

/* ============================================================
   5. PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-xl);
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card .card-title a {
  transition: color var(--duration-fast) var(--ease-out);
}

.project-card .card-title a:hover {
  color: var(--color-brand-green);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-md);
  margin-bottom: var(--sp-sm);
}

.project-card-links {
  display: flex;
  gap: var(--sp-xs);
}

.project-card-links a {
  width: 32px;
  height: 32px;
  border-radius: var(--rd-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  transition:
    color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out);
}

.project-card-links a:hover {
  color: var(--color-ink);
  background-color: var(--color-surface);
}

.project-card-links a svg {
  width: 16px;
  height: 16px;
}

/* ============================================================
   6. LABORATORY
   ============================================================ */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

.lab-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-sm);
}

.lab-card-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-top: var(--sp-md);
  color: var(--color-muted);
  font-size: var(--fs-caption);
}

.lab-card-progress {
  margin-top: var(--sp-md);
  height: 3px;
  border-radius: var(--rd-full);
  background-color: var(--color-hairline);
  overflow: hidden;
}

.lab-card-progress-bar {
  height: 100%;
  border-radius: var(--rd-full);
  background: linear-gradient(90deg, var(--color-brand-green), var(--color-brand-green-deep));
  transition: width 1s var(--ease-out);
}

/* ============================================================
   7. ARTICLES
   ============================================================ */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-sm);
}

.article-card-date {
  font-size: var(--fs-caption);
  color: var(--color-muted);
}

.article-card-reading-time {
  font-size: var(--fs-caption);
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: var(--sp-xxs);
}

.article-card-reading-time::before {
  content: '·';
  color: var(--color-hairline);
}

.article-card .card-description {
  flex: 1;
}

.article-card .card-link {
  margin-top: auto;
  padding-top: var(--sp-md);
}

/* ============================================================
   8. STACK — Tech Badges Grid
   ============================================================ */
.stack-categories {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xxxl);
}

.stack-category-title {
  font-size: var(--fs-h5);
  font-weight: var(--fw-h5);
  color: var(--color-ink);
  margin-bottom: var(--sp-md);
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}

.stack-category-title svg {
  width: 18px;
  height: 18px;
  color: var(--color-brand-green);
}

.stack-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}

.stack-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  padding: 8px 16px;
  border-radius: var(--rd-full);
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  color: var(--color-slate);
  transition:
    transform var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
  cursor: default;
}

.stack-badge:hover {
  transform: translateY(-2px);
  border-color: var(--color-brand-green);
  color: var(--color-ink);
  box-shadow: var(--shadow-sm);
  background-color: rgba(0, 212, 164, 0.05);
}

.stack-badge img,
.stack-badge svg {
  width: 18px;
  height: 18px;
  border-radius: var(--rd-xs);
}

[data-theme='dark'] .stack-badge {
  background-color: var(--color-surface);
  border-color: var(--color-hairline);
}

[data-theme='dark'] .stack-badge:hover {
  background-color: rgba(0, 212, 164, 0.08);
  border-color: rgba(0, 212, 164, 0.30);
}

/* ============================================================
   9. TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: var(--sp-xxxl);
}

/* Vertical connecting line */
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 15px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--color-brand-green),
    var(--color-hairline) 15%,
    var(--color-hairline) 85%,
    transparent
  );
}

.timeline-item {
  position: relative;
  padding-bottom: var(--sp-xxxl);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* Timeline dot */
.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--sp-xxxl) + 10px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: var(--rd-full);
  background-color: var(--color-canvas);
  border: 2px solid var(--color-hairline);
  z-index: 2;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.timeline-item:hover .timeline-dot,
.timeline-item.active .timeline-dot {
  border-color: var(--color-brand-green);
  background-color: var(--color-brand-green);
  box-shadow: 0 0 0 4px rgba(0, 212, 164, 0.15);
}

[data-theme='dark'] .timeline-dot {
  background-color: var(--color-surface);
}

/* Year marker */
.timeline-year {
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--sp-xs);
}

.timeline-title {
  font-size: var(--fs-h3);
  font-weight: var(--fw-h3);
  color: var(--color-hero-dark-to);
  margin-bottom: var(--sp-xxs);
}

.timeline-subtitle {
  font-size: var(--fs-body-sm);
  color: var(--color-steel);
  margin-bottom: var(--sp-sm);
}

.timeline-description {
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body-sm);
  color: var(--color-steel);
}

.timeline-project {
  margin-top: var(--sp-md);
  padding: var(--sp-md);
  background-color: transparent;
  border: 1px solid var(--color-hairline-soft);
  border-radius: var(--rd-lg);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.timeline-project:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-brand-green);
}

.timeline-project:first-of-type {
  margin-top: var(--sp-sm);
}

.timeline-project-title {
  font-family: var(--font-display);
  font-size: var(--fs-h5);
  font-weight: var(--fw-h5);
  color: var(--color-ink);
  margin-bottom: var(--sp-xs);
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  flex-wrap: wrap;
}

.timeline-project-description {
  font-size: var(--fs-body-sm);
  line-height: 1.6;
  color: var(--color-steel);
  margin-bottom: var(--sp-sm);
}

.timeline-project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge-mini {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--rd-full);
  font-weight: 500;
}

.badge-personal {
  background-color: rgba(139, 92, 246, 0.10);
  color: #8b5cf6;
  border: 1px solid rgba(139, 92, 246, 0.20);
}

[data-theme='dark'] .badge-personal {
  background-color: rgba(167, 139, 250, 0.12);
  color: #c084fc;
  border-color: rgba(167, 139, 250, 0.25);
}

/* ============================================================
   10. EXPERIENCE
   ============================================================ */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xxl);
}

.experience-item {
  position: relative;
  padding-left: var(--sp-xxxl);
}

/* Vertical line */
.experience-list::before {
  content: '';
  position: absolute;
  top: 0;
  left: 15px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--color-brand-green),
    var(--color-hairline) 10%,
    var(--color-hairline) 90%,
    transparent
  );
}

.experience-item .timeline-dot {
  left: calc(-1 * var(--sp-xxxl) + 10px);
}

.experience-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-md);
  margin-bottom: var(--sp-sm);
}

.experience-role {
  font-size: var(--fs-h4);
  font-weight: var(--fw-h4);
  color: var(--color-ink);
  line-height: var(--lh-h4);
}

.experience-company {
  font-size: var(--fs-body-md);
  font-weight: 500;
  color: var(--color-brand-green);
}

.experience-period {
  font-size: var(--fs-caption);
  color: var(--color-muted);
  white-space: nowrap;
  padding: 4px 12px;
  border-radius: var(--rd-full);
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline-soft);
}

.experience-description {
  font-size: var(--fs-body-sm);
  line-height: 1.65;
  color: var(--color-steel);
  margin-bottom: var(--sp-md);
}

.experience-impacts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}

.experience-impact {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xxs);
  padding: 4px 12px;
  border-radius: var(--rd-full);
  font-size: var(--fs-caption);
  font-weight: 500;
  background-color: rgba(0, 212, 164, 0.08);
  color: var(--color-brand-green-deep);
  border: 1px solid rgba(0, 212, 164, 0.15);
}

[data-theme='dark'] .experience-impact {
  color: var(--color-brand-green);
  background-color: rgba(0, 212, 164, 0.10);
  border-color: rgba(0, 212, 164, 0.20);
}

/* ============================================================
   11. PHILOSOPHY
   ============================================================ */
.philosophy-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-xl);
}

.philosophy-item {
  display: flex;
  gap: var(--sp-md);
  padding: var(--sp-xl);
  border-radius: var(--rd-lg);
  border: 1px solid var(--color-hairline-soft);
  background-color: var(--color-surface-soft);
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.philosophy-item:hover {
  transform: translateY(-2px);
  border-color: var(--color-hairline);
  box-shadow: var(--shadow-sm);
}

.philosophy-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--rd-md);
  background: linear-gradient(135deg, rgba(0,212,164,0.12), rgba(0,212,164,0.04));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.philosophy-icon svg {
  width: 18px;
  height: 18px;
  color: var(--color-brand-green);
}

.philosophy-text h4 {
  font-size: var(--fs-body-md);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--sp-xxs);
}

.philosophy-text p {
  font-size: var(--fs-body-sm);
  line-height: 1.55;
  color: var(--color-steel);
}

[data-theme='dark'] .philosophy-item {
  background-color: var(--color-surface-soft);
  border-color: var(--color-hairline);
}

/* ============================================================
   12. CONTACT — CTA Section
   ============================================================ */
.contact-cta {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.contact-cta .heading-2 {
  margin-bottom: var(--sp-md);
}

.contact-cta .subtitle {
  margin-bottom: var(--sp-xxl);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: var(--sp-sm);
  margin-top: var(--sp-xl);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  padding: 12px 24px;
  border-radius: var(--rd-full);
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline);
  font-family: var(--font-mono);
  font-size: var(--fs-body-sm);
  color: var(--color-slate);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out);
}

.contact-email:hover {
  border-color: var(--color-brand-green);
  background-color: rgba(0, 212, 164, 0.05);
}

.contact-social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--rd-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-hairline);
  color: var(--color-steel);
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.contact-social-link:hover {
  color: var(--color-brand-green);
  border-color: var(--color-brand-green);
  background-color: rgba(0, 212, 164, 0.05);
  transform: translateY(-2px);
}

.contact-social-link svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   13. FOOTER
   ============================================================ */
.footer {
  padding-top: var(--sp-section);
  padding-bottom: var(--sp-xxl);
  border-top: 1px solid var(--color-hairline);
  background-color: var(--color-surface-soft);
  transition: background-color var(--duration-slow) var(--ease-out);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--sp-xxxl);
  margin-bottom: var(--sp-section);
}

.footer-brand {
  max-width: 280px;
}

.footer-brand-name {
  font-size: var(--fs-h5);
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: var(--sp-sm);
}

.footer-brand-name span {
  color: var(--color-brand-green);
}

.footer-brand-description {
  font-size: var(--fs-body-sm);
  line-height: 1.60;
  color: var(--color-steel);
}

.footer-column-title {
  font-size: var(--fs-micro);
  font-weight: var(--fw-micro);
  letter-spacing: var(--ls-micro);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--sp-md);
}

.footer-link {
  display: block;
  font-size: var(--fs-body-sm);
  color: var(--color-steel);
  padding: var(--sp-xxs) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-link:hover {
  color: var(--color-ink);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-xl);
  border-top: 1px solid var(--color-hairline);
}

.footer-copyright {
  font-size: var(--fs-caption);
  color: var(--color-muted);
}

.footer-bottom-links {
  display: flex;
  gap: var(--sp-md);
}

.footer-bottom-link {
  font-size: var(--fs-caption);
  color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-bottom-link:hover {
  color: var(--color-ink);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

/* Fade In Up — Sections on Scroll */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s var(--ease-out),
    transform 0.6s var(--ease-out);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.5s var(--ease-out),
    transform 0.5s var(--ease-out);
}

.stagger-children.visible > *:nth-child(1)  { transition-delay: 0.05s; }
.stagger-children.visible > *:nth-child(2)  { transition-delay: 0.10s; }
.stagger-children.visible > *:nth-child(3)  { transition-delay: 0.15s; }
.stagger-children.visible > *:nth-child(4)  { transition-delay: 0.20s; }
.stagger-children.visible > *:nth-child(5)  { transition-delay: 0.25s; }
.stagger-children.visible > *:nth-child(6)  { transition-delay: 0.30s; }
.stagger-children.visible > *:nth-child(7)  { transition-delay: 0.35s; }
.stagger-children.visible > *:nth-child(8)  { transition-delay: 0.40s; }
.stagger-children.visible > *:nth-child(9)  { transition-delay: 0.45s; }
.stagger-children.visible > *:nth-child(10) { transition-delay: 0.50s; }
.stagger-children.visible > *:nth-child(11) { transition-delay: 0.55s; }
.stagger-children.visible > *:nth-child(12) { transition-delay: 0.60s; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Subtle float for decorative elements */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.float {
  animation: float 6s ease-in-out infinite;
}

/* Shimmer effect for loading states */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-surface) 25%,
    var(--color-hairline-soft) 50%,
    var(--color-surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

/* ============================================================
   SECTION HEADER PATTERN (reusable)
   ============================================================ */
.section-header {
  max-width: 640px;
  margin-bottom: var(--sp-xxxl);
  border-left: 4px solid var(--color-brand-green);
  padding-left: var(--sp-xl);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.section-header.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-header .heading-2 {
  margin-bottom: var(--sp-sm);
}

.section-header .subtitle {
  color: var(--color-steel);
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* ── Extra large: ≥1280px ──────────────────────────────────── */
/* Default styles above cover this */

/* ── Large: 1024–1279px ────────────────────────────────────── */
@media (max-width: 1279px) {
  :root {
    --fs-hero-display: 60px;
    --fs-display-lg: 48px;
    --fs-h1: 42px;
    --fs-h2: 32px;
  }

  .hero-inner {
    gap: var(--sp-xxxl);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr repeat(2, 1fr);
  }
}

/* ── Medium: 768–1023px ────────────────────────────────────── */
@media (max-width: 1023px) {
  :root {
    --fs-hero-display: 56px;
    --ls-hero-display: -1.5px;
    --fs-display-lg: 44px;
    --fs-h1: 38px;
    --fs-h2: 30px;
    --fs-h3: 24px;
    --sp-section-lg: 72px;
    --gutter: 24px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-roles {
    align-items: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-illustration {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-xxl);
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .lab-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .philosophy-list {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-xxl);
  }

  /* Nav: show mobile toggle, hide desktop links */
  .nav-links {
    display: none;
  }

  .nav-menu-toggle {
    display: flex;
  }

  .nav-mobile {
    display: block;
    pointer-events: none;
  }

  .nav-mobile.open {
    pointer-events: auto;
  }
}

/* ── Small: 480–767px ──────────────────────────────────────── */
@media (max-width: 767px) {
  :root {
    --fs-hero-display: 44px;
    --ls-hero-display: -1px;
    --fs-display-lg: 36px;
    --fs-h1: 32px;
    --fs-h2: 26px;
    --fs-h3: 22px;
    --fs-h4: 20px;
    --fs-subtitle: 16px;
    --sp-section-lg: 64px;
    --gutter: 20px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .lab-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .experience-header {
    flex-direction: column;
    gap: var(--sp-xs);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-xxl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--sp-md);
    text-align: center;
  }

  .contact-links {
    flex-wrap: wrap;
  }

  .about-highlights {
    gap: var(--sp-sm); /* Reduce gap between cards from 16px to 12px */
  }

  .about-highlight {
    padding: var(--sp-md); /* Reduce padding from 20px to 16px */
    border-radius: var(--rd-md); /* Reduce border radius from 12px to 8px */
    gap: var(--sp-sm); /* Reduce gap inside the card from 16px to 12px */
  }

  .about-highlight-icon {
    width: 38px;
    height: 38px;
  }

  .about-highlight-icon svg {
    width: 18px;
    height: 18px;
  }

  .about-highlight-text .value {
    font-size: var(--fs-body-sm); /* Reduce value font size slightly */
  }
}

/* ── Extra small: <480px ───────────────────────────────────── */
@media (max-width: 479px) {
  :root {
    --fs-hero-display: 36px;
    --ls-hero-display: -0.5px;
    --fs-display-lg: 30px;
    --fs-h1: 28px;
    --fs-h2: 24px;
    --fs-h3: 20px;
    --fs-h4: 18px;
    --sp-section-lg: 56px;
    --gutter: 16px;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--sp-xxxl));
    padding-bottom: var(--sp-section);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    justify-content: center;
  }

  .hero-scroll-indicator {
    display: none;
  }

  .btn-lg {
    padding: 12px 24px;
    font-size: 14px;
  }

  .philosophy-item {
    flex-direction: column;
    gap: var(--sp-sm);
  }

  .about-highlight {
    flex-direction: column;
    text-align: center;
    padding: var(--sp-sm) var(--sp-md); /* Even smaller vertical padding on extra small devices */
  }

  .contact-email {
    font-size: var(--fs-caption);
    padding: 10px 18px;
  }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .stagger-children > * {
    opacity: 1;
    transform: none;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-brand-green);
  outline-offset: 2px;
  border-radius: var(--rd-sm);
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gutter);
  z-index: 10000;
  padding: 8px 16px;
  background-color: var(--color-brand-green);
  color: var(--color-canvas-dark);
  border-radius: var(--rd-full);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--sp-sm);
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  .nav,
  .hero-scroll-indicator,
  .theme-toggle,
  .nav-menu-toggle,
  .footer {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .hero {
    min-height: auto;
    padding: 20pt 0;
  }

  .section {
    padding: 20pt 0;
    page-break-inside: avoid;
  }

  .card, .card-feature {
    border: 1px solid #ccc;
    box-shadow: none;
    break-inside: avoid;
  }
}

/* ============================================================
   MISC UTILITIES
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.text-ink      { color: var(--color-ink); }
.text-slate    { color: var(--color-slate); }
.text-steel    { color: var(--color-steel); }
.text-stone    { color: var(--color-stone); }
.text-muted    { color: var(--color-muted); }
.text-green    { color: var(--color-brand-green); }

.bg-canvas     { background-color: var(--color-canvas); }
.bg-surface    { background-color: var(--color-surface); }

.flex          { display: flex; }
.flex-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.items-center  { align-items: center; }
.justify-center{ justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs        { gap: var(--sp-xs); }
.gap-sm        { gap: var(--sp-sm); }
.gap-md        { gap: var(--sp-md); }
.gap-lg        { gap: var(--sp-lg); }
.gap-xl        { gap: var(--sp-xl); }

.mt-sm  { margin-top: var(--sp-sm); }
.mt-md  { margin-top: var(--sp-md); }
.mt-lg  { margin-top: var(--sp-lg); }
.mt-xl  { margin-top: var(--sp-xl); }
.mt-xxl { margin-top: var(--sp-xxl); }

.mb-sm  { margin-bottom: var(--sp-sm); }
.mb-md  { margin-bottom: var(--sp-md); }
.mb-lg  { margin-bottom: var(--sp-lg); }
.mb-xl  { margin-bottom: var(--sp-xl); }
.mb-xxl { margin-bottom: var(--sp-xxl); }

.rounded-full { border-radius: var(--rd-full); }
.rounded-lg   { border-radius: var(--rd-lg); }

.w-full { width: 100%; }

/* Divider */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-hairline);
  border: none;
  margin: var(--sp-section-lg) 0;
}

/* Gradient text utility */
.gradient-text {
  background: linear-gradient(135deg, var(--color-brand-green), var(--color-brand-green-deep));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Green accent line (decorative) */
.accent-line {
  width: 48px;
  height: 3px;
  border-radius: var(--rd-full);
  background: linear-gradient(90deg, var(--color-brand-green), var(--color-brand-green-deep));
  margin-bottom: var(--sp-lg);
}

.accent-line.center {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   9. EDUCAÇÃO
   ============================================================ */
.educacao-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-section);
  margin-top: var(--sp-xl);
}

@media (min-width: 1024px) {
  .educacao-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-section-lg);
  }
}

.educacao-col {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

.educacao-title {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  border-bottom: 2px solid var(--color-hairline);
  padding-bottom: var(--sp-sm);
  font-family: var(--font-display);
}

.educacao-title svg {
  width: 20px;
  height: 20px;
  color: var(--color-brand-green);
}

.educacao-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.educacao-card {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rd-lg);
  padding: var(--sp-lg);
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    background-color var(--duration-slow) var(--ease-out);
}

.educacao-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-brand-green);
}

[data-theme='dark'] .educacao-card {
  background-color: var(--color-surface);
}

.educacao-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-xs);
  flex-wrap: wrap;
  gap: var(--sp-xs);
}

.educacao-institution {
  font-size: var(--fs-caption);
  color: var(--color-steel);
  font-weight: 500;
}

.educacao-item-title {
  font-size: var(--fs-h5);
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.4;
  font-family: var(--font-display);
}

/* ============================================================
   10. CERTIFICAÇÕES
   ============================================================ */


.certificacoes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-lg);
  margin-top: var(--sp-lg);
}

.certificacao-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rd-lg);
  padding: var(--sp-lg);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: 
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    background-color var(--duration-slow) var(--ease-out);
  outline: none;
}

[data-theme='dark'] .certificacao-card {
  background-color: var(--color-surface);
}

.certificacao-card:focus-visible {
  outline: 2px solid var(--color-brand-green);
  outline-offset: 4px;
}

.certificacao-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-brand-green);
  box-shadow: var(--shadow-md);
}

.certificacao-badge-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  aspect-ratio: 1 / 1;
  border-radius: var(--rd-md);
  padding: var(--sp-md);
  margin-bottom: var(--sp-md);
  transition: transform var(--duration-base) var(--ease-out);
}

.certificacao-card:hover .certificacao-badge-wrapper {
  transform: scale(1.03);
}

.certificacao-badge-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.certificacao-info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xxs);
  margin-bottom: var(--sp-md);
}

.certificacao-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-brand-green);
  letter-spacing: var(--ls-micro);
}

.certificacao-title {
  font-family: var(--font-display);
  font-size: var(--fs-h5);
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.35;
}

.certificacao-action-hint {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: var(--fs-caption);
  font-weight: 600;
  color: var(--color-steel);
  transition: color var(--duration-base) var(--ease-out);
}

.certificacao-card:hover .certificacao-action-hint {
  color: var(--color-brand-green);
}

.certificacao-action-hint svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-base) var(--ease-out);
}

.certificacao-card:hover .certificacao-action-hint svg {
  transform: translateX(3px);
}

/* ── Certification Modal ────────────────────────────────────── */
.cert-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(9, 14, 12, 0.75); /* Match dark canvas tone */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
  padding: var(--sp-md);
}

.cert-modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.cert-modal-container {
  background-color: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rd-xl);
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.96) translateY(12px);
  transition: transform var(--duration-base) var(--ease-out);
  box-shadow: var(--shadow-xl);
}

.cert-modal-overlay.open .cert-modal-container {
  transform: scale(1) translateY(0);
}

[data-theme='dark'] .cert-modal-container {
  background-color: var(--color-surface);
  box-shadow: var(--shadow-xl), var(--shadow-glow-green);
}

.cert-modal-close {
  position: absolute;
  top: var(--sp-lg);
  right: var(--sp-lg);
  background: none;
  border: none;
  color: var(--color-steel);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
  z-index: 10;
}

.cert-modal-close:hover {
  background-color: var(--color-hairline);
  color: var(--color-ink);
}

.cert-modal-close svg {
  width: 20px;
  height: 20px;
}

.cert-modal-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--sp-xl);
  padding: var(--sp-xl);
}

@media (max-width: 640px) {
  .cert-modal-content {
    grid-template-columns: 1fr;
    gap: var(--sp-lg);
    padding: var(--sp-lg);
  }
  
  .cert-modal-left {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .cert-modal-badge-container {
    width: 160px !important;
    height: 160px !important;
  }
}

.cert-modal-left {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.cert-modal-badge-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 200px;
  border-radius: var(--rd-lg);
  padding: var(--sp-md);
}

.cert-modal-badge-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cert-modal-right {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.cert-modal-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-brand-green);
  letter-spacing: var(--ls-micro);
  margin-bottom: var(--sp-xxs);
}

.cert-modal-title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: var(--sp-md);
  line-height: 1.25;
}

.cert-modal-body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.cert-modal-section {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--sp-md);
}

.cert-modal-section:first-child {
  border-top: none;
  padding-top: 0;
}

.cert-modal-sec-title {
  font-family: var(--font-display);
  font-size: var(--fs-caption);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-steel);
  margin-bottom: var(--sp-xs);
}

.cert-modal-desc {
  font-size: var(--fs-body-sm);
  color: var(--color-charcoal);
  line-height: 1.5;
}

.cert-modal-details-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
  list-style: none;
}

.cert-modal-details-list li {
  font-size: var(--fs-body-sm);
  color: var(--color-charcoal);
  line-height: 1.4;
  position: relative;
  padding-left: var(--sp-md);
}

.cert-modal-details-list li::before {
  content: "•";
  color: var(--color-brand-green);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.cert-modal-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}

.cert-modal-skills .badge {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  padding: 4px 8px;
  background-color: var(--color-surface-soft);
  color: var(--color-charcoal);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rd-md);
}

[data-theme='dark'] .cert-modal-skills .badge {
  background-color: var(--color-surface);
}

/* ============================================================
   WHATSAPP FLOATING BUTTON
   ============================================================ */
.whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 40px;
  right: 40px;
  background-color: #25D366;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  font-size: 30px;
  box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.whatsapp-float:hover {
  transform: translateY(-5px);
  box-shadow: 0px 6px 16px rgba(0, 0, 0, 0.2);
  background-color: #128C7E;
  color: #FFF;
}

.whatsapp-float svg {
  width: 35px;
  height: 35px;
}

@media (max-width: 768px) {
  .whatsapp-float {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
  }
  .whatsapp-float svg {
    width: 28px;
    height: 28px;
  }
}