/* ============================================================
   DESIGN SYSTEM — Mohammad Omor Faruk Portfolio
   Premium personal brand. Modern SaaS aesthetics.
   ============================================================ */

/* --- DESIGN TOKENS --- */
:root {
  /* Brand */
  --accent: #6d28d9;
  --accent-hover: #5b21b6;
  --accent-soft: rgba(109,40,217,0.08);
  --accent-glow: rgba(109,40,217,0.25);
  --accent-text: #6d28d9;

  /* Surfaces */
  --bg: #ffffff;
  --surface: #f8f8fa;
  --card: #f1f1f4;
  --card-hover: #eaeaee;
  --surface-elevated: #ffffff;

  /* Borders */
  --border: rgba(0,0,0,0.07);
  --border-hover: rgba(0,0,0,0.15);
  --border-accent: rgba(109,40,217,0.3);

  /* Text */
  --text: #0a0a0b;
  --text-secondary: #3d3d42;
  --text-muted: #6b6b73;
  --text-dim: #9a9aa3;
  --text-inverse: #ffffff;

  /* Logo */
  --logo-bg: #0a0a0b;
  --logo-text: #ffffff;

  /* Semantic */
  --success: #16a34a;
  --success-soft: rgba(22,163,74,0.1);
  --warning: #d97706;
  --warning-soft: rgba(217,119,6,0.1);
  --error: #dc2626;
  --error-soft: rgba(220,38,38,0.1);

  /* Radius */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --radius-full: 100px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 24px var(--accent-glow);

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.2s;
  --duration-md: 0.35s;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  /* Layout */
  --container: 1120px;
  --nav-height: 64px;

  color-scheme: light;
}

[data-theme="dark"] {
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-soft: rgba(139,92,246,0.12);
  --accent-glow: rgba(139,92,246,0.3);
  --accent-text: #a78bfa;

  --bg: #09090b;
  --surface: #111113;
  --card: #18181b;
  --card-hover: #1f1f23;
  --surface-elevated: #18181b;

  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.12);
  --border-accent: rgba(139,92,246,0.3);

  --text: #f0f0f3;
  --text-secondary: #c4c4cc;
  --text-muted: #8e8e97;
  --text-dim: #5c5c66;
  --text-inverse: #0a0a0b;

  --logo-bg: #8b5cf6;
  --logo-text: #0a0a0b;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 2px 8px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5), 0 4px 8px rgba(0,0,0,0.3);

  color-scheme: dark;
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Instrument Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; color: inherit; }

/* --- SKIP TO CONTENT --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-xs);
  font-size: 0.82rem;
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus { top: var(--space-md); }

/* --- FOCUS STATES --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- CONTAINER --- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5, h6 { line-height: 1.1; letter-spacing: -0.03em; font-weight: 700; }
.mono { font-family: 'IBM Plex Mono', 'Fira Code', monospace; }

/* --- NAVIGATION --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: var(--nav-height);
  gap: 1rem;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.nav-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--logo-bg);
  color: var(--logo-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  font-family: 'IBM Plex Mono', monospace;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.nav-mark:hover { transform: scale(1.05); }
.nav-name { font-size: 0.85rem; font-weight: 600; letter-spacing: -0.01em; }
.nav-sub { font-size: 0.68rem; color: var(--text-dim); margin-top: 1px; font-family: 'IBM Plex Mono', monospace; }
.nav-right { display: flex; align-items: center; gap: 0.25rem; }
.nav-links { display: flex; align-items: center; gap: 0.125rem; }
.nav-links a {
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--duration) var(--ease);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

/* Theme toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1rem;
  flex-shrink: 0;
  transition: all var(--duration) var(--ease);
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:not([data-theme="dark"]) .theme-toggle .icon-sun { display: none; }
:not([data-theme="dark"]) .theme-toggle .icon-moon { display: block; }

/* Hamburger */
.hamburger {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all var(--duration-md) var(--ease);
}
.hamburger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: color-mix(in srgb, var(--bg) 95%, transparent);
  backdrop-filter: blur(24px);
  z-index: 999;
  padding: var(--space-xl);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--duration-md) var(--ease), transform var(--duration-md) var(--ease);
}
.mobile-nav.open { opacity: 1; transform: translateY(0); }
.mobile-nav a {
  display: block;
  padding: var(--space-md) 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--duration) var(--ease);
}
.mobile-nav a:hover { color: var(--accent); }
.mobile-nav .mobile-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-xl);
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--duration) var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(255,255,255,0.15), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}
.btn:hover::after { opacity: 1; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface-elevated);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-ghost {
  color: var(--text-muted);
  padding: 0.65rem 0.75rem;
}
.btn-ghost:hover { color: var(--accent); }
.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.75rem; border-radius: 8px; }
.btn-lg { padding: 0.8rem 1.75rem; font-size: 0.9rem; border-radius: 12px; }

/* --- BADGES --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-accent {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}
.badge-success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(22,163,74,0.2);
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

/* --- CARDS --- */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem;
  transition: all var(--duration-md) var(--ease);
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.card-glass {
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* --- SECTION HEADER --- */
.section { padding: var(--space-3xl) 0; }
.section-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  max-width: 560px;
  color: var(--text);
}
.section-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 0.6rem;
  max-width: 520px;
}

/* --- GRID LAYOUTS --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.two-col { display: grid; grid-template-columns: 1fr 1.3fr; gap: 2rem; }

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 5rem 0 3rem;
  min-height: 70vh;
}

/* Animated gradient background */
.hero-bg {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(80px);
  opacity: 0.3;
  pointer-events: none;
  animation: hero-glow 8s ease-in-out infinite alternate;
}
@keyframes hero-glow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-40px, 30px) scale(1.1); }
}

.hero-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Availability badge */
.availability {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--success-soft);
  border: 1px solid rgba(22,163,74,0.2);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--success);
  margin-bottom: 1.25rem;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.04em;
  margin-top: 1rem;
  color: var(--text);
}
h1 em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
h1 em::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.3;
}

.hero-desc {
  margin-top: 1.25rem;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 500px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

/* Hero card / profile area */
.hero-profile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-photo-frame {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover), transparent);
  margin-bottom: 1.5rem;
}
.hero-photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 3px solid var(--bg);
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-photo-placeholder {
  font-size: 4rem;
  font-weight: 700;
  color: var(--text-dim);
  font-family: 'IBM Plex Mono', monospace;
}

/* Floating trust badges */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  animation: float-badge 3s ease-in-out infinite;
  backdrop-filter: blur(8px);
}
.floating-badge svg { flex-shrink: 0; color: var(--accent); }
.floating-badge:nth-child(2) { top: 10%; right: -10%; animation-delay: 0.5s; }
.floating-badge:nth-child(3) { top: 35%; left: -15%; animation-delay: 1s; }
.floating-badge:nth-child(4) { bottom: 25%; right: -12%; animation-delay: 1.5s; }
.floating-badge:nth-child(5) { bottom: 5%; left: -5%; animation-delay: 2s; }
.floating-badge:nth-child(6) { top: 55%; right: -20%; animation-delay: 0.8s; }
.floating-badge:nth-child(7) { top: 0%; left: -10%; animation-delay: 1.3s; }
@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* Hero stats card */
.hero-stats-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem;
  width: 100%;
  max-width: 400px;
}
.hero-stats-card h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.hero-stats-card p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  line-height: 1.6;
}
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-top: 1.25rem;
}
.stat {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 0.8rem;
  transition: all var(--duration) var(--ease);
}
.stat:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}
.stat-val {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.stat-lb {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 0.1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* ============================================================
   SOCIAL PROOF BAR
   ============================================================ */
.trust-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 2rem 0;
  transition: background var(--duration) var(--ease);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.5rem;
  text-align: center;
}
.trust-item { display: flex; flex-direction: column; align-items: center; gap: 0.25rem; }
.trust-val {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-family: 'IBM Plex Mono', monospace;
}
.trust-label {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* ============================================================
   SERVICES
   ============================================================ */
.service-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem;
  transition: all var(--duration-md) var(--ease);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1rem;
  transition: all var(--duration) var(--ease);
}
.service-card:hover .service-icon {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.service-card h4 { font-size: 0.95rem; font-weight: 600; letter-spacing: -0.01em; }
.service-card .service-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-top: 0.4rem;
  flex: 1;
}
.service-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  color: var(--text-dim);
}
.service-meta span { display: flex; align-items: center; gap: 0.25rem; }
.service-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.75rem; }
.service-tags span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.15rem 0.55rem;
  color: var(--text-dim);
}

/* ============================================================
   PROJECTS / CASE STUDIES
   ============================================================ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.25rem;
  margin-bottom: 1.5rem;
}
.filter-pill {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}
.filter-pill:hover { border-color: var(--accent); color: var(--accent); }
.filter-pill.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.work-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem;
  transition: all var(--duration-md) var(--ease);
  display: flex;
  flex-direction: column;
}
.work-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.work-cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.work-card h4 { font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; }
.work-card .work-result {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.5rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--success-soft);
  color: var(--success);
  font-size: 0.7rem;
  font-weight: 600;
}
.work-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.65; margin-top: 0.35rem; }
.work-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 0.75rem; }
.work-tags span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.15rem 0.5rem;
  color: var(--text-dim);
}
.work-links { display: flex; gap: 0.5rem; margin-top: 0.75rem; }
.work-links a {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  transition: gap var(--duration) var(--ease);
}
.work-links a:hover { gap: 0.4rem; }

/* ============================================================
   PROCESS
   ============================================================ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  position: relative;
}
.process-grid::before {
  content: '';
  position: absolute;
  top: 2.5rem;
  left: 12%;
  right: 12%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-hover), transparent);
}
.process-step {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.5rem;
  transition: all var(--duration-md) var(--ease);
  text-align: center;
  position: relative;
  z-index: 1;
}
.process-step:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.process-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0.25;
  line-height: 1;
}
.process-step h4 { font-size: 0.9rem; font-weight: 600; margin-top: 0.5rem; letter-spacing: -0.01em; }
.process-step p { font-size: 0.75rem; color: var(--text-muted); line-height: 1.6; margin-top: 0.3rem; }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}
.testimonial-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.75rem;
  transition: all var(--duration-md) var(--ease);
  display: flex;
  flex-direction: column;
}
.testimonial-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.testimonial-stars {
  display: flex;
  gap: 0.15rem;
  color: #f59e0b;
  margin-bottom: 0.75rem;
}
.testimonial-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--accent);
  flex-shrink: 0;
}
.testimonial-name { font-size: 0.8rem; font-weight: 600; }
.testimonial-role { font-size: 0.68rem; color: var(--text-dim); margin-top: 1px; }

/* ============================================================
   TESTIMONIALS — MARQUEE (like certs)
   ============================================================ */
.testimonials-scroll {
  position: relative;
  margin-top: 1.5rem;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
}
.testimonials-scroll-track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: ts-marquee 40s linear infinite;
}
.testimonials-scroll:hover .testimonials-scroll-track {
  animation-play-state: paused;
}
@keyframes ts-marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.testimonial-scroll-card {
  flex-shrink: 0;
  width: 320px;
  max-width: 85vw;
  scroll-snap-align: start;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--duration-md) var(--ease);
}
.testimonial-scroll-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.testimonial-scroll-card .testimonial-stars {
  margin-bottom: 0.6rem;
}
.testimonial-scroll-card .testimonial-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  font-style: italic;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.testimonial-scroll-author {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.testimonial-scroll-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.7rem;
  color: var(--accent);
  flex-shrink: 0;
  text-transform: uppercase;
}
.testimonial-scroll-info {
  flex: 1;
  min-width: 0;
}
.testimonial-scroll-name {
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.testimonial-scroll-meta {
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-top: 1px;
}
.testimonial-scroll-badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.5rem;
  font-weight: 500;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  margin-left: auto;
}
.testimonial-scroll-time {
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
}
@media (max-width: 640px) {
  .testimonials-scroll { mask-image: none; -webkit-mask-image: none; }
  .testimonials-scroll-track {
    animation: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.5rem;
  }
  .testimonials-scroll-track::-webkit-scrollbar { display: none; }
  .testimonial-scroll-card { scroll-snap-align: start; }
}

/* ============================================================
   FAQ / ACCORDION
   ============================================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.5rem;
  max-width: 680px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
  transition: border-color var(--duration) var(--ease);
}
.faq-item.open { border-color: var(--border-hover); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  background: none;
  border: none;
  transition: color var(--duration) var(--ease);
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  transition: transform var(--duration-md) var(--ease);
  flex-shrink: 0;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-md) var(--ease);
}
.faq-answer-inner {
  padding: 0 1.25rem 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.contact-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 1.25rem;
  text-align: center;
  transition: all var(--duration-md) var(--ease);
  display: block;
}
.contact-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.contact-item .label {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.contact-item .val {
  font-size: 0.82rem;
  font-weight: 600;
  margin-top: 0.3rem;
  color: var(--accent);
}
.contact-item .sub {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  transition: all var(--duration) var(--ease);
  outline: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-error {
  font-size: 0.7rem;
  color: var(--error);
  display: none;
}
.form-group.error .form-input,
.form-group.error .form-textarea {
  border-color: var(--error);
}
.form-group.error .form-error { display: block; }

/* Submit button states */
.btn-submit {
  position: relative;
  min-height: 44px;
}
.btn-submit .btn-text { transition: opacity var(--duration) var(--ease); }
.btn-submit .btn-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}
.btn-submit.loading .btn-text { opacity: 0; }
.btn-submit.loading .btn-loading { opacity: 1; }
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Success state */
.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}
.form-success.show { display: block; }
.form-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--success-soft);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  animation: scale-in 0.4s var(--ease-spring);
}
@keyframes scale-in {
  from { transform: scale(0); }
  to { transform: scale(1); }
}
.form-success h3 { font-size: 1.1rem; font-weight: 600; }
.form-success p { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.4rem; }

/* CTA block */
.cta-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 3rem;
  text-align: center;
  transition: background var(--duration) var(--ease);
}
.cta-block h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.cta-block p {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 440px;
  margin: 0.6rem auto 1.25rem;
  line-height: 1.6;
}

/* ============================================================
   TIMELINE (about page)
   ============================================================ */
.timeline { display: flex; flex-direction: column; gap: 0; margin-top: 1rem; }
.tl-item {
  border-left: 2px solid var(--border);
  padding-left: 1.5rem;
  position: relative;
  padding-bottom: 1.5rem;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.tl-item:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.tl-period {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tl-role { font-size: 0.95rem; font-weight: 600; margin-top: 0.15rem; letter-spacing: -0.01em; }
.tl-org { font-size: 0.75rem; color: var(--text-dim); margin-top: 2px; }
.tl-bullets {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.tl-bullets li {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding-left: 1rem;
  position: relative;
}
.tl-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

/* ============================================================
   SKILLS (about page)
   ============================================================ */
.skill-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; margin-top: 1rem; }
.skill-cat {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 1rem;
  transition: all var(--duration-md) var(--ease);
  cursor: default;
}
.skill-cat:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}
.skill-cat h5 {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.skill-tags span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.12rem 0.5rem;
  color: var(--text-dim);
  transition: all var(--duration) var(--ease);
}
.skill-cat:hover .skill-tags span {
  border-color: var(--border-hover);
  color: var(--text-muted);
}

/* ============================================================
   PROJECTS (about page)
   ============================================================ */
.proj-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; margin-top: 1.5rem; }
.proj-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.5rem;
  transition: all var(--duration-md) var(--ease);
}
.proj-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.proj-cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.proj-card h4 { font-size: 0.95rem; font-weight: 600; letter-spacing: -0.01em; }
.proj-card p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; margin-top: 0.3rem; }
.proj-links { display: flex; gap: 0.5rem; margin-top: 0.6rem; }
.proj-links a {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.proj-tags { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-top: 0.6rem; }
.proj-tags span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.58rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.1rem 0.5rem;
  color: var(--text-dim);
}

/* ============================================================
   APPS (about page)
   ============================================================ */
/* ============================================================
   ANDROID APPS — SCROLL CAROUSEL
   ============================================================ */
.app-scroll {
  position: relative;
  margin-top: 1rem;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
}
.app-scroll-track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: app-marquee 50s linear infinite;
}
.app-scroll:hover .app-scroll-track {
  animation-play-state: paused;
}
@keyframes app-marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@media (max-width: 640px) {
  .app-scroll { mask-image: none; -webkit-mask-image: none; }
  .app-scroll-track {
    animation: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.5rem;
  }
  .app-scroll-track::-webkit-scrollbar { display: none; }
  .app-scroll-card { scroll-snap-align: start; }
}
.app-scroll-card {
  flex-shrink: 0;
  width: 260px;
  scroll-snap-align: start;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: all var(--duration-md) var(--ease);
}
.app-scroll-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
  transform: translateY(-3px);
}
.app-scroll-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  object-position: top;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}
.app-scroll-info {
  padding: 0.65rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.app-scroll-icon {
  width: 30px; height: 30px;
  border-radius: 7px;
  flex-shrink: 0;
  object-fit: cover;
  background: var(--card);
}
.app-scroll-name {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.app-scroll-pkg {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.55rem;
  color: var(--text-dim);
  margin-top: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.app-badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.55rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  background: var(--accent);
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  backdrop-filter: blur(4px);
}
.app-badge.dev {
  background: rgba(0,0,0,0.55);
  color: #fff;
}
[data-theme="dark"] .app-badge.dev {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* ============================================================
   WRITEUPS (about page)
   ============================================================ */
.writeup-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.5rem; }
.writeup-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 1.25rem;
  transition: all var(--duration-md) var(--ease);
}
.writeup-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.writeup-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.writeup-category {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.writeup-reading-time {
  font-size: 0.62rem;
  color: var(--text-dim);
}
.writeup-card h4 { font-size: 0.88rem; font-weight: 600; letter-spacing: -0.01em; }
.writeup-card p { font-size: 0.74rem; color: var(--text-muted); margin-top: 0.25rem; line-height: 1.5; }
.writeup-card a {
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.5rem;
  transition: gap var(--duration) var(--ease);
}
.writeup-card a:hover { gap: 0.4rem; }

/* ============================================================
   CERTIFICATIONS — MARQUEE (icon cards)
   ============================================================ */
.cert-marquee {
  position: relative;
  margin-top: 1rem;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
}
.cert-marquee-track {
  display: flex;
  gap: 0.5rem;
  width: max-content;
  animation: marquee-scroll 50s linear infinite;
}
.cert-marquee:hover .cert-marquee-track {
  animation-play-state: paused;
}
@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.cert-marquee-card {
  flex-shrink: 0;
  width: 200px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 0.55rem 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-md) var(--ease);
  position: relative;
  overflow: hidden;
}
.cert-marquee-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}
.cert-marquee-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
  transform: translateY(-2px);
}
.cert-marquee-card:hover::before { opacity: 1; }
.cert-marquee-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: #fff;
}
.cert-marquee-icon svg { width: 14px; height: 14px; }
.cert-marquee-icon.blue   { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.cert-marquee-icon.green  { background: linear-gradient(135deg, #22c55e, #16a34a); }
.cert-marquee-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.cert-marquee-icon.orange { background: linear-gradient(135deg, #f97316, #ea580c); }
.cert-marquee-icon.red    { background: linear-gradient(135deg, #ef4444, #dc2626); }
.cert-marquee-icon.teal   { background: linear-gradient(135deg, #14b8a6, #0d9488); }
.cert-marquee-icon.pink   { background: linear-gradient(135deg, #ec4899, #db2777); }
.cert-marquee-icon.gold   { background: linear-gradient(135deg, #f59e0b, #d97706); }
.cert-marquee-info { flex: 1; min-width: 0; }
.cert-marquee-name {
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: -0.01em; line-height: 1.25;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.cert-marquee-issuer { font-size: 0.6rem; color: var(--text-dim); margin-top: 0.1rem; }
@media (max-width: 640px) {
  .cert-marquee { mask-image: none; -webkit-mask-image: none; }
  .cert-marquee-track {
    animation: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.5rem;
  }
  .cert-marquee-track::-webkit-scrollbar { display: none; }
  .cert-marquee-card { scroll-snap-align: start; width: 180px; }
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}
.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}
/* Stagger children */
.stagger > * { transition-delay: calc(var(--i, 0) * 0.08s); }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md), 0 0 16px var(--accent-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--duration-md) var(--ease);
  z-index: 900;
  cursor: pointer;
  border: none;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), 0 0 24px var(--accent-glow);
}

/* ============================================================
   READING PROGRESS BAR
   ============================================================ */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent-hover));
  z-index: 1001;
  transition: width 0.1s linear;
}

/* ============================================================
   COMMAND PALETTE
   ============================================================ */
.cmd-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 10000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration) var(--ease);
}
.cmd-overlay.open { opacity: 1; visibility: visible; }
.cmd-palette {
  width: 100%;
  max-width: 520px;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  transform: scale(0.96) translateY(-8px);
  transition: transform var(--duration-md) var(--ease-spring);
  overflow: hidden;
}
.cmd-overlay.open .cmd-palette { transform: scale(1) translateY(0); }
.cmd-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.cmd-input-wrap svg { color: var(--text-dim); flex-shrink: 0; }
.cmd-input {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  font-size: 0.9rem;
  color: var(--text);
}
.cmd-results {
  max-height: 320px;
  overflow-y: auto;
  padding: 0.5rem;
}
.cmd-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--duration) var(--ease);
}
.cmd-item:hover,
.cmd-item.active {
  background: var(--accent-soft);
}
.cmd-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  flex-shrink: 0;
}
.cmd-item-text { font-size: 0.82rem; font-weight: 500; }
.cmd-item-shortcut {
  margin-left: auto;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.62rem;
  color: var(--text-dim);
  display: flex;
  gap: 0.2rem;
}
.cmd-item-shortcut kbd {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
  font-size: 0.6rem;
}
.cmd-footer {
  padding: 0.5rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.65rem;
  color: var(--text-dim);
}
.cmd-footer kbd {
  padding: 0.1rem 0.3rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--card);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.58rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 2.5rem 0;
  margin-top: 2rem;
  transition: background var(--duration) var(--ease);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.footer-name { font-size: 0.85rem; font-weight: 600; }
.footer-sub { font-size: 0.72rem; color: var(--text-dim); margin-top: 0.25rem; line-height: 1.6; }
.footer-heading {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: color var(--duration) var(--ease);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* ============================================================
   UTILITIES
   ============================================================ */
.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-dim { color: var(--text-dim); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* Copy email button */
.copy-btn {
  position: relative;
  cursor: pointer;
}
.copy-btn .copied-tooltip {
  position: absolute;
  top: -32px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--text);
  color: var(--bg);
  font-size: 0.65rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration) var(--ease);
}
.copy-btn.copied .copied-tooltip { opacity: 1; }

/* ============================================================
   RESPONSIVE — TABLET (max-width: 900px)
   ============================================================ */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 3rem 0 1.5rem; min-height: auto; }
  .hero-profile { order: -1; margin-bottom: 1rem; }
  .hero-bg { display: none; }
  .floating-badge { display: none; }
  .hero-stats-card { max-width: 100%; }
  .two-col { grid-template-columns: 1fr; }
  .grid-3, .process-grid, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid::before { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid, .writeup-grid, .proj-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  /* Mobile nav */
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
}

/* ============================================================
   RESPONSIVE — MOBILE (max-width: 640px)
   ============================================================ */
@media (max-width: 640px) {
  .section { padding: var(--space-2xl) 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .skill-grid { grid-template-columns: 1fr; }
  .cta-block { padding: 2rem 1.25rem; }
  h1 { font-size: clamp(1.8rem, 8vw, 2.6rem); }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .filter-bar { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 0.5rem; }
  .filter-pill { flex-shrink: 0; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}

/* ============================================================
   PREFERS REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
  }
  html { scroll-behavior: auto; }
}

/* ============================================================
   PREFERS COLOR SCHEME — Auto dark mode
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --accent-soft: rgba(139,92,246,0.12);
    --accent-glow: rgba(139,92,246,0.3);
    --accent-text: #a78bfa;
    --bg: #09090b;
    --surface: #111113;
    --card: #18181b;
    --card-hover: #1f1f23;
    --surface-elevated: #18181b;
    --border: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.12);
    --border-accent: rgba(139,92,246,0.3);
    --text: #f0f0f3;
    --text-secondary: #c4c4cc;
    --text-muted: #8e8e97;
    --text-dim: #5c5c66;
    --text-inverse: #0a0a0b;
    --logo-bg: #8b5cf6;
    --logo-text: #0a0a0b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow: 0 2px 8px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.2);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5), 0 4px 8px rgba(0,0,0,0.3);
    color-scheme: dark;
  }
}