/* ========================================
   IDNX Portfolio — Design System
   Asep Saepullah | saepullrock.tech
   ======================================== */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ---- Custom Properties ---- */
:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 150ms var(--ease);
  --transition-base: 300ms var(--ease);
  --transition-slow: 500ms var(--ease);

  /* Z-index layers */
  --z-base: 1;
  --z-nav: 100;
  --z-overlay: 150;
  --z-modal: 200;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

/* ---- Dark Theme (default) ---- */
:root,
[data-theme="dark"] {
  --bg-primary: #06060b;
  --bg-secondary: #0e0e16;
  --bg-tertiary: #161620;
  --surface: #12121c;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #0ea5e9;
  --accent-light: #38bdf8;
  --accent-dark: #0284c7;
  --accent-rgb: 14, 165, 233;
  --accent2: #06b6d4;
  --accent2-rgb: 6, 182, 212;
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --glass-bg: rgba(14, 14, 22, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --card-bg: rgba(255, 255, 255, 0.025);
  --card-hover-bg: rgba(255, 255, 255, 0.055);
  --nav-bg: rgba(6, 6, 11, 0.75);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.45);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.5);
  --glow: 0 0 20px rgba(var(--accent-rgb), 0.15);
  --glow-strong: 0 0 40px rgba(var(--accent-rgb), 0.25);
  --mesh-1: rgba(14, 165, 233, 0.07);
  --mesh-2: rgba(6, 182, 212, 0.05);
  --mesh-3: rgba(99, 102, 241, 0.04);
  --tag-bg: rgba(14, 165, 233, 0.1);
  --tag-color: #38bdf8;
  --tag-border: rgba(14, 165, 233, 0.2);
  --toggle-bg: #1e293b;
  --code-bg: rgba(255,255,255,0.05);
}

/* ---- Light Theme ---- */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --surface: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #0284c7;
  --accent-light: #0ea5e9;
  --accent-dark: #0369a1;
  --accent-rgb: 2, 132, 199;
  --accent2: #0891b2;
  --accent2-rgb: 8, 145, 178;
  --border: rgba(0, 0, 0, 0.07);
  --border-strong: rgba(0, 0, 0, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.1);
  --card-bg: rgba(255, 255, 255, 0.7);
  --card-hover-bg: rgba(255, 255, 255, 0.9);
  --nav-bg: rgba(248, 250, 252, 0.8);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.1);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.12);
  --glow: 0 0 20px rgba(var(--accent-rgb), 0.1);
  --glow-strong: 0 0 40px rgba(var(--accent-rgb), 0.18);
  --mesh-1: rgba(2, 132, 199, 0.06);
  --mesh-2: rgba(8, 145, 178, 0.04);
  --mesh-3: rgba(99, 102, 241, 0.03);
  --tag-bg: rgba(2, 132, 199, 0.08);
  --tag-color: #0369a1;
  --tag-border: rgba(2, 132, 199, 0.18);
  --toggle-bg: #e2e8f0;
  --code-bg: rgba(0,0,0,0.04);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover { color: var(--accent-light); }

ul, ol { list-style: none; }

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

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

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: '//';
  opacity: 0.5;
}

.section-title {
  margin-bottom: var(--space-lg);
}

.section-desc {
  color: var(--text-secondary);
  max-width: 600px;
  font-size: 1.05rem;
}

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

section {
  padding-block: var(--space-4xl);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(var(--accent-rgb), 0.4);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--glow);
}

.btn--ghost {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.btn--ghost:hover {
  background: var(--card-hover-bg);
  border-color: rgba(var(--accent-rgb), 0.3);
  box-shadow: var(--glow);
}

/* ---- Tags ---- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--tag-color);
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 1rem 0;
  background: transparent;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.navbar__logo span {
  color: var(--accent);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 1px;
  transition: width var(--transition-base);
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--text-primary);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--toggle-bg);
  position: relative;
  transition: background var(--transition-base);
  border: 1px solid var(--border);
  cursor: pointer;
}

.theme-toggle__knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

[data-theme="light"] .theme-toggle__knob {
  transform: translateX(20px);
}

/* Mobile Menu */
.navbar__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  z-index: calc(var(--z-nav) + 2);
}

.navbar__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar__burger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__burger.open span:nth-child(2) {
  opacity: 0;
}

.navbar__burger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero__mesh {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 40%, var(--mesh-1) 0%, transparent 50%),
    radial-gradient(circle at 75% 25%, var(--mesh-2) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, var(--mesh-3) 0%, transparent 50%);
  animation: meshFloat 25s ease-in-out infinite;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 0.3s forwards;
}

.hero__name {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  min-height: 1.2em;
}

.hero__name .cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--accent);
  margin-left: 4px;
  animation: blink 1s step-end infinite;
  vertical-align: baseline;
  position: relative;
  top: 0.05em;
}

.hero__title {
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 1.8s forwards;
}

.hero__title span {
  color: var(--accent);
  font-weight: 600;
}

.hero__desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  max-width: 540px;
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 2.2s forwards;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 2.6s forwards;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 3s forwards;
}

.hero__scroll-hint .mouse {
  width: 22px;
  height: 36px;
  border: 2px solid var(--text-muted);
  border-radius: 11px;
  position: relative;
}

.hero__scroll-hint .mouse::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollDot 2s ease-in-out infinite;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
  background: var(--bg-secondary);
}

.about__grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about__photo-wrapper {
  position: relative;
}

.about__photo-ring {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent));
  background-size: 200% 200%;
  animation: gradientRotate 4s ease-in-out infinite;
  box-shadow: var(--glow-strong);
}

.about__photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-secondary);
}

.about__photo-dot {
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 22px;
  height: 22px;
  background: #22c55e;
  border-radius: 50%;
  border: 3px solid var(--bg-secondary);
  animation: pulse 2s ease-in-out infinite;
}

.about__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about__bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.stat-card:hover {
  background: var(--card-hover-bg);
  border-color: rgba(var(--accent-rgb), 0.3);
  transform: translateY(-4px);
  box-shadow: var(--glow);
}

.stat-card__number {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-card__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.skill-group {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.skill-group:hover {
  background: var(--card-hover-bg);
  border-color: rgba(var(--accent-rgb), 0.2);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}

.skill-group__title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-group__title .icon {
  font-size: 1.2rem;
}

.skill-group__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.skill-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-item__name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.skill-item__level {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.skill-item__bar {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.skill-item__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 3px;
  width: 0;
  transition: width 1.2s var(--ease);
}

.skill-item__fill.animate {
  /* width set via inline style */
}

/* ========================================
   PROJECTS SECTION
   ======================================== */
.projects {
  background: var(--bg-secondary);
}

.projects__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.projects__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.filter-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-lg);
}

/* Project Card */
.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  background: var(--card-hover-bg);
  border-color: rgba(var(--accent-rgb), 0.25);
  box-shadow: var(--shadow-lg), var(--glow);
}

.project-card.hidden {
  display: none;
}

.project-card__image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-tertiary), var(--surface));
}

.project-card__image img[src$="ai_job.png"] {
  /* Fallback handled in HTML with onerror */
}

.project-card__image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  font-size: 3rem;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image img {
  transform: scale(1.05);
}

.project-card__badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
}

.project-card__content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
}

.project-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: var(--space-sm);
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact__inner {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
}

.contact__desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.8;
}

.contact__email-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.15rem;
  font-weight: 600;
  padding: 1rem 2.5rem;
  margin-bottom: var(--space-2xl);
}

.contact__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-base);
}

.social-link:hover {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.3);
  background: var(--card-hover-bg);
  transform: translateY(-3px);
  box-shadow: var(--glow);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: var(--space-xl) 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer__copy a {
  color: var(--accent);
  font-weight: 600;
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__link {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--accent);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: var(--z-base);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(var(--accent-rgb), 0.4);
  color: #fff;
}

/* ========================================
   SCROLL REVEAL ANIMATION
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ========================================
   KEYFRAMES
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes meshFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -2%) rotate(2deg); }
  66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

@keyframes scrollDot {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

@keyframes gradientRotate {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ========================================
   MOBILE OVERLAY
   ======================================== */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: calc(var(--z-nav) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-overlay__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 2rem;
}

.mobile-overlay__link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.mobile-overlay__link:hover {
  color: var(--accent);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  section { padding-block: var(--space-3xl); }

  .navbar__links { display: none; }
  
  .navbar__burger { display: flex; }

  .mobile-overlay { display: block; }

  .hero__content { max-width: 100%; }

  .hero__scroll-hint { display: none; }

  .about__grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-xl);
  }

  .about__photo-wrapper {
    justify-self: center;
  }

  .about__photo-ring {
    width: 200px;
    height: 200px;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .stat-card { padding: var(--space-md); }

  .stat-card__number { font-size: 1.5rem; }

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

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

  .footer__inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .section-desc {
    margin-inline: auto;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }

  h1 { font-size: 2rem; }

  .hero__name { font-size: 2.2rem; }

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

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .projects__filters {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
  }

  .filter-btn {
    flex-shrink: 0;
  }

  .contact__email-btn {
    font-size: 1rem;
    padding: 0.85rem 2rem;
  }
}

/* ========================================
   CUSTOM SCROLLBAR
   ======================================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background: rgba(var(--accent-rgb), 0.25);
  color: var(--text-primary);
}

/* ---- Focus visible ---- */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}