/* ============================================================
   PORTFOLIO — Senior UX Designer
   Design System & Stylesheet
   ============================================================ */

/* ============================================================
   1. CSS VARIABLES & THEME
   ============================================================ */
:root {
  /* Colors — Dark Theme (default) */
  --bg-primary:      #071120;
  --bg-secondary:    #0B1020;
  --bg-card:         #111827;
  --bg-card-hover:   #1F2937;
  --bg-glass:        rgba(11, 16, 32, 0.8);
  --bg-glass-light:  rgba(255, 255, 255, 0.03);

  /* Text */
  --text-primary:    #F8FAFC;
  --text-secondary:  #CBD5E1;
  --text-muted:      #94A3B8;
  --text-inverse:    #071120;

  /* Accent */
  --accent:          #3B82F6;
  --accent-hover:    #60A5FA;
  --accent-2:        #06B6D4;
  --accent-3:        #8B5CF6;
  --accent-rgb:      59, 130, 246;
  --accent-2-rgb:    6, 182, 212;

  /* Gradients */
  --gradient-accent: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
  --gradient-glow:   linear-gradient(135deg, rgba(59,130,246,0.15) 0%, rgba(6,182,212,0.15) 100%);
  --gradient-card:   linear-gradient(135deg, rgba(59,130,246,0.05) 0%, rgba(6,182,212,0.05) 100%);
  --gradient-hero:   radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59,130,246,0.2), transparent);

  /* Borders */
  --border:          rgba(255, 255, 255, 0.08);
  --divider:         rgba(255, 255, 255, 0.06);
  --border-accent:   rgba(59, 130, 246, 0.35);
  --border-hover:    rgba(255, 255, 255, 0.14);

  /* Status */
  --success:         #22C55E;
  --error:           #EF4444;
  --warning:         #F59E0B;

  /* Shadows */
  --shadow-sm:       0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:       0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow:     0 0 40px rgba(59,130,246,0.2);
  --shadow-card:     0 0 0 1px rgba(255,255,255,0.08), 0 4px 24px rgba(0,0,0,0.3);

  /* Typography */
  --font-display:    'Plus Jakarta Sans', 'Inter', sans-serif;
  --font-body:       'Inter', sans-serif;
  --font-mono:       'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing (8px base grid) */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
  --nav-height: 72px;

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-smooth:   cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:      cubic-bezier(0, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary:     #f0f4f8;
  --bg-secondary:   #ffffff;
  --bg-card:        #ffffff;
  --bg-card-hover:  #EFF6FF;
  --bg-glass:       rgba(255, 255, 255, 0.85);
  --bg-glass-light: rgba(255, 255, 255, 0.6);

  --text-primary:   #071120;
  --text-secondary: #374151;
  --text-muted:     #6B7280;
  --text-inverse:   #F8FAFC;

  --border:         rgba(0, 0, 0, 0.08);
  --divider:        rgba(0, 0, 0, 0.06);
  --border-hover:   rgba(0, 0, 0, 0.14);
  --border-accent:  rgba(59, 130, 246, 0.3);

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.10);
  --shadow-glow:    0 0 40px rgba(59,130,246,0.15);
  --shadow-card:    0 0 0 1px rgba(0,0,0,0.07), 0 4px 24px rgba(0,0,0,0.06);

  --gradient-hero:  radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59,130,246,0.1), transparent);
  --gradient-card:  linear-gradient(135deg, rgba(59,130,246,0.03) 0%, rgba(6,182,212,0.03) 100%);
  --gradient-accent: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--duration-slow) var(--ease-smooth),
              color var(--duration-slow) var(--ease-smooth);
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; }

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

/* ── Scrollbar — themed to blue/cyan ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3B82F6, #06B6D4);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #60A5FA, #22D3EE);
}

/* ── Top scroll progress bar ── */
#scroll-progress {
  background: linear-gradient(90deg, #3B82F6 0%, #06B6D4 60%, #8B5CF6 100%) !important;
  height: 3px !important;
  box-shadow: 0 0 8px rgba(59,130,246,0.5);
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.04em;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1, h2, h3, h4 { font-family: var(--font-display); }

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted     { color: var(--text-muted); }
.text-accent    { color: var(--accent); }

/* ============================================================
   4. LAYOUT & UTILITIES
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-32) 0;
  position: relative;
  overflow: hidden;
}

.section--alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-tag,
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.flex    { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2  { gap: var(--space-2); }
.gap-4  { gap: var(--space-4); }
.gap-6  { gap: var(--space-6); }

/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-smooth);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.06);
  opacity: 0;
  transition: opacity var(--duration-fast);
}
.btn:hover::after { opacity: 1; }

.btn--primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.35);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(var(--accent-rgb), 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn--ghost {
  background: var(--bg-glass-light);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn--lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--duration-base) var(--ease-spring);
}
.btn:hover svg { transform: translateX(3px); }

/* ============================================================
   6. CARDS
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all var(--duration-base) var(--ease-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--duration-base);
  pointer-events: none;
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.card:hover::before { opacity: 1; }

.card__body { padding: var(--space-8); }

/* ============================================================
   7. TAGS & BADGES
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent-hover);
  border: 1px solid rgba(var(--accent-rgb), 0.15);
}

.tag--success {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.2);
}

.tag--purple {
  background: rgba(var(--accent-2-rgb), 0.1);
  color: var(--accent-3);
  border-color: rgba(var(--accent-2-rgb), 0.2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-glass-light);
  color: var(--text-secondary);
}

.badge--available {
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
  color: #10b981;
}

.badge--available::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}

/* ============================================================
   8. LOADING SCREEN
   ============================================================ */
#loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-6);
  transition: opacity 0.5s var(--ease-smooth), visibility 0.5s;
}

#loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__logo {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loader__bar {
  width: 160px;
  height: 2px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.loader__bar-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  animation: loader-fill 1.5s var(--ease-smooth) forwards;
}

/* ============================================================
   9. NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: all var(--duration-slow) var(--ease-smooth);
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.nav__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__menu a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  position: relative;
}

.nav__menu a:hover,
.nav__menu a.active {
  color: var(--text-primary);
  background: var(--bg-glass-light);
}

.nav__menu a.active { color: var(--accent); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-light);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--duration-base);
}
.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

/* Hamburger */
.nav__hamburger {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-glass-light);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-smooth);
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

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

/* Animated Background */
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

[data-theme="light"] .hero__grid {
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
}

/* ── Hero glow blobs (replaced orbs) ── */
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  pointer-events: none;
}

.hero__glow--1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(59,130,246,0.45) 0%, transparent 70%);
  top: -160px;
  right: -60px;
}

.hero__glow--2 {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(6,182,212,0.3) 0%, transparent 70%);
  bottom: -80px;
  left: -60px;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-16);
  min-height: calc(100vh - var(--nav-height));
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.hero__content { position: relative; z-index: 1; }

.hero__badge,
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #22C55E;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  letter-spacing: 0.01em;
}

.hero__badge::before,
.hero__eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22C55E;
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}

.hero__headline {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.hero__headline span {
  display: block;
}

.hero__description {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: var(--space-8);
}

.hero__stats {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.hero__stat strong,
.hero__stat-val {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 4px;
}

.hero__stat span,
.hero__stat-lbl {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.hero__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.hero__tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 5px 12px;
  background: var(--bg-glass-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
}

/* Hero Visual */
.hero__visual {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__mockup {
  width: 100%;
  max-width: 520px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  animation: float-card 6s ease-in-out infinite;
}

.mockup__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.mockup__dots {
  display: flex;
  gap: 6px;
}

.mockup__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.mockup__dot:nth-child(1) { background: #ef4444; }
.mockup__dot:nth-child(2) { background: #f59e0b; }
.mockup__dot:nth-child(3) { background: #10b981; }

.mockup__title {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  margin-left: var(--space-2);
}

/* Dashboard mockup elements */
.mockup__metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.mockup__metric {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.mockup__metric-val {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 2px;
}

.mockup__metric-val.up   { color: #10b981; }
.mockup__metric-val.down { color: #ef4444; }
.mockup__metric-val.neu  { background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.mockup__metric-lbl {
  font-size: 10px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mockup__chart {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  height: 100px;
  position: relative;
  overflow: hidden;
}

.mockup__chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 100%;
}

.mockup__bar {
  flex: 1;
  background: rgba(var(--accent-rgb), 0.15);
  border-radius: 4px 4px 0 0;
  transition: background var(--duration-base);
  position: relative;
  overflow: hidden;
}

.mockup__bar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--gradient-accent);
  border-radius: 4px 4px 0 0;
  animation: bar-grow 2s var(--ease-out) both;
}

.mockup__bar:nth-child(1)::after { height: 40%; animation-delay: 0.1s; }
.mockup__bar:nth-child(2)::after { height: 70%; animation-delay: 0.2s; }
.mockup__bar:nth-child(3)::after { height: 55%; animation-delay: 0.3s; }
.mockup__bar:nth-child(4)::after { height: 85%; animation-delay: 0.4s; }
.mockup__bar:nth-child(5)::after { height: 65%; animation-delay: 0.5s; }
.mockup__bar:nth-child(6)::after { height: 90%; animation-delay: 0.6s; }
.mockup__bar:nth-child(7)::after { height: 75%; animation-delay: 0.7s; }

.mockup__row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}

.mockup__row:last-child { border-bottom: none; }

.mockup__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-accent);
  flex-shrink: 0;
}

.mockup__row-label {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-full);
}

.mockup__row-val {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Scroll hint */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: scroll-hint 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

/* ============================================================
   11. TRUST / CLIENTS BAR
   ============================================================ */
.trust-bar {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.trust-bar__label {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.trust-bar__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.trust-logo {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
  opacity: 0.5;
  letter-spacing: -0.02em;
  transition: opacity var(--duration-base);
}
.trust-logo:hover { opacity: 1; }

/* ============================================================
   12. ABOUT SECTION
   ============================================================ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about__text p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-5);
}

.about__text p strong {
  color: var(--text-primary);
  font-weight: 600;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.philosophy-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--duration-base) var(--ease-smooth);
}

.philosophy-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.philosophy-card__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(var(--accent-rgb), 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  font-size: 18px;
}

.philosophy-card__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.philosophy-card__desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-8);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-primary);
  transition: background var(--duration-base);
}

.timeline__item:hover::before { background: var(--accent); }

.timeline__period {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-1);
}

.timeline__role {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.timeline__company {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.timeline__desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   13. CASE STUDIES
   ============================================================ */
.case-studies__filter {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.filter-btn {
  font-size: 13px;
  font-weight: 500;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--duration-base);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
}

.case-studies__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.cs-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-slow) var(--ease-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}

.cs-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.cs-card--featured {
  grid-column: span 2;
  flex-direction: row;
}

.cs-card__image {
  background: var(--bg-secondary);
  overflow: hidden;
  position: relative;
  min-height: 200px;
}

.cs-card--featured .cs-card__image {
  flex: 1;
  min-height: 320px;
}

.cs-card__image-placeholder {
  width: 100%;
  height: 100%;
  min-height: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  background: var(--gradient-glow);
  position: relative;
}

.cs-card__image-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0.06;
}

.cs-card__body {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.cs-card--featured .cs-card__body {
  padding: var(--space-10);
  justify-content: center;
}

.cs-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.cs-card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.cs-card--featured .cs-card__title {
  font-size: 26px;
  margin-bottom: var(--space-4);
}

.cs-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  flex: 1;
}

.cs-card__metrics {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cs-metric strong {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-metric span {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.cs-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--duration-base) var(--ease-spring);
  margin-top: auto;
}

.cs-card__link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-base) var(--ease-spring);
}

.cs-card:hover .cs-card__link { gap: var(--space-3); }
.cs-card:hover .cs-card__link svg { transform: translateX(4px); }

/* ============================================================
   14. DESIGN SYSTEM SECTION
   ============================================================ */
.ds-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.ds-tab {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--duration-base);
}

.ds-tab.active {
  background: var(--bg-card);
  border-color: var(--border-accent);
  color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.08);
}

.ds-panel { display: none; }
.ds-panel.active { display: block; }

.ds-section-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

/* Color Swatches */
.color-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.swatch {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.swatch__color {
  height: 64px;
  width: 100%;
}

.swatch__info {
  padding: var(--space-2) var(--space-3);
  background: var(--bg-card);
}

.swatch__name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

.swatch__value {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Type Scale */
.type-scale { display: flex; flex-direction: column; gap: var(--space-4); }

.type-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  align-items: baseline;
  gap: var(--space-6);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border);
}

.type-item__meta {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Component Showcase */
.component-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.component-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.component-card__preview {
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  min-height: 100px;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.component-card__info {
  padding: var(--space-4) var(--space-5);
}

.component-card__name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.component-card__desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* Spacing Demo */
.spacing-demo { display: flex; flex-direction: column; gap: var(--space-3); }

.space-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.space-item__bar { background: var(--gradient-accent); height: 8px; border-radius: var(--radius-full); }
.space-item__label { font-size: 12px; font-family: var(--font-mono); color: var(--text-muted); white-space: nowrap; min-width: 60px; }

/* Data Grid Demo */
.data-grid-demo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.data-grid-demo table {
  width: 100%;
  border-collapse: collapse;
}

.data-grid-demo thead { background: var(--bg-secondary); }
.data-grid-demo th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.data-grid-demo td {
  padding: var(--space-3) var(--space-4);
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.data-grid-demo tr:last-child td { border-bottom: none; }
.data-grid-demo tr:hover td { background: var(--bg-card-hover); }

/* ============================================================
   15. UX GUIDELINES SECTION
   ============================================================ */
.ux-guidelines__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.guideline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--duration-base) var(--ease-smooth);
  cursor: pointer;
}

.guideline-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.guideline-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--space-4);
  transition: background var(--duration-base);
}

.guideline-card:hover .guideline-card__icon {
  background: rgba(var(--accent-rgb), 0.18);
}

.guideline-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.guideline-card__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.guideline-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.guideline-card__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.guideline-card__item::before {
  content: '→';
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   16. FRONTEND SECTION
   ============================================================ */
.frontend__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.code-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-smooth);
}

.code-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
}

.code-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.code-card__lang {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.code-card__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.code-card__body {
  padding: var(--space-5);
}

.code-snippet {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-secondary);
  white-space: pre-wrap;
  overflow-x: auto;
}

.code-snippet .kw { color: #60A5FA; }
.code-snippet .fn { color: #60d9f1; }
.code-snippet .str { color: #86efac; }
.code-snippet .cm { color: var(--text-muted); font-style: italic; }
.code-snippet .prop { color: #fda4af; }
.code-snippet .num { color: #f9a8d4; }

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--duration-base);
}

.tech-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.05);
}

/* ============================================================
   17. SKILLS SECTION
   ============================================================ */
.skills__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.skill-bars { display: flex; flex-direction: column; gap: var(--space-5); }

.skill-bar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.skill-bar__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-bar__pct {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  font-family: var(--font-mono);
}

.skill-bar__track {
  height: 6px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  width: 0;
  transition: width 1.2s var(--ease-out);
}

/* Skill Rings */
.skill-rings {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.skill-ring {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.skill-ring__svg {
  width: 80px;
  height: 80px;
  transform: rotate(-90deg);
}

.skill-ring__track {
  fill: none;
  stroke: var(--border);
  stroke-width: 6;
}

.skill-ring__fill {
  fill: none;
  stroke: url(#ring-gradient);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  transition: stroke-dashoffset 1.4s var(--ease-out);
}

.skill-ring__label {
  text-align: center;
}

.skill-ring__name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.skill-ring__pct {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.tool-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base);
  text-align: center;
}

.tool-item:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.tool-item__icon { font-size: 24px; }
.tool-item__name { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* ============================================================
   18a. SKILLS CARD GRID
   ============================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: var(--space-10);
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--duration-base) var(--ease-smooth);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-smooth);
}

.skill-card:hover {
  border-color: rgba(var(--accent-rgb), 0.35);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover, 0 16px 40px rgba(0,0,0,0.35));
}

.skill-card:hover::before { opacity: 1; }

.skill-card__icon {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 4px;
}

.skill-card__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.skill-card__desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ============================================================
   18b. UX PROCESS TIMELINE
   ============================================================ */
.process__timeline {
  margin-top: var(--space-12);
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process__steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 10%, var(--border) 90%, transparent);
  z-index: 0;
}

.process__step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.process__step-dot {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid rgba(var(--accent-rgb), 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: all var(--duration-base) var(--ease-smooth);
  position: relative;
}

.process__step:hover .process__step-dot {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.4);
}

.process__step-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.process__step-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.process__step-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   18c. TOOLS GRID
   ============================================================ */
.tools__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: var(--space-10);
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  transition: all var(--duration-base) var(--ease-smooth);
  position: relative;
  overflow: hidden;
}

.tool-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-smooth);
}

.tool-card:hover {
  border-color: rgba(var(--accent-rgb), 0.3);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

.tool-card:hover::after { opacity: 1; }

.tool-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(var(--accent-rgb), 0.08);
  border: 1px solid rgba(var(--accent-rgb), 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  flex-shrink: 0;
}

.tool-card__icon svg {
  width: 28px;
  height: 28px;
}

.tool-card__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.tool-card__role {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ============================================================
   18. TESTIMONIALS SECTION
   ============================================================ */
.testimonials__slider {
  position: relative;
  overflow: hidden;
}

.testimonials__track {
  display: flex;
  transition: transform var(--duration-slow) var(--ease-smooth);
}

.testimonial-card {
  flex-shrink: 0;
  width: calc(33.333% - var(--space-4));
  margin-right: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  transition: all var(--duration-base);
}

.testimonial-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
}

.testimonial-card__quote {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-6);
  position: relative;
  padding-top: var(--space-6);
}

.testimonial-card__quote::before {
  content: '"';
  position: absolute;
  top: -8px;
  left: -4px;
  font-size: 60px;
  font-family: var(--font-display);
  line-height: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.5;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-display);
}

.testimonial-card__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.testimonial-card__role {
  font-size: 12px;
  color: var(--text-muted);
}

.testimonials__controls {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.testimonials__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: all var(--duration-base);
  cursor: pointer;
}

.testimonials__dot.active {
  width: 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
}

/* ============================================================
   19. RESUME SECTION
   ============================================================ */
.resume__layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.resume__heading {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-6);
}

.resume-exp { display: flex; flex-direction: column; gap: var(--space-6); }

.resume-exp__item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-6);
}

.resume-exp__period {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  padding-top: 3px;
}

.resume-exp__role {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.resume-exp__company {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.resume-exp__desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

.resume-exp__achievements {
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.resume-exp__achievements li {
  font-size: 12px;
  color: var(--text-muted);
  padding-left: var(--space-4);
  position: relative;
  line-height: 1.6;
}

.resume-exp__achievements li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 10px;
}

.cert-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: all var(--duration-base);
}

.cert-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.cert-card__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.cert-card__name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.cert-card__org {
  font-size: 11px;
  color: var(--text-muted);
}

.resume__download {
  display: flex;
  justify-content: center;
  margin-top: var(--space-12);
}

/* ============================================================
   20. CONTACT SECTION
   ============================================================ */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-16);
  align-items: start;
}

.contact__info p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.contact__socials {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--duration-base);
}

.social-link:hover {
  border-color: var(--border-accent);
  color: var(--accent);
  transform: translateX(4px);
}

.social-link__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(var(--accent-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
  transition: background var(--duration-base);
}

.social-link:hover .social-link__icon {
  background: rgba(var(--accent-rgb), 0.2);
}

/* Contact Form */
.contact__form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all var(--duration-base);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-muted); }

.form-textarea { resize: vertical; min-height: 120px; }

.form-input.error,
.form-textarea.error { border-color: var(--error); }

.form-error {
  font-size: 11px;
  color: var(--error);
  margin-top: var(--space-1);
  display: none;
}

.form-input.error + .form-error,
.form-textarea.error + .form-error { display: block; }

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-8);
}

.form-success.show { display: block; }

.form-success__icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
}

.form-success__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-success__msg {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============================================================
   21. FOOTER
   ============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: var(--space-10) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}

.footer__brand-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 240px;
}

.footer__col-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.footer__links a:hover { color: var(--text-primary); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.footer__copyright {
  font-size: 13px;
  color: var(--text-muted);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer__bottom-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.footer__bottom-links a:hover { color: var(--text-primary); }

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

.reveal--left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal--right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.is-visible,
.reveal--left.is-visible,
.reveal--right.is-visible,
.reveal--scale.is-visible {
  opacity: 1;
  transform: none;
}

.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; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ============================================================
   23. KEYFRAME ANIMATIONS
   ============================================================ */
@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -20px) scale(1.05); }
  66%       { transform: translate(-20px, 15px) scale(0.97); }
}

@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}

@keyframes scroll-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50%       { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50%       { box-shadow: 0 0 0 5px rgba(16, 185, 129, 0); }
}

@keyframes loader-fill {
  from { width: 0; }
  to   { width: 100%; }
}

@keyframes bar-grow {
  from { height: 0; }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fade-in 0.8s var(--ease-out) both;
}

/* ============================================================
   24. MOBILE NAVIGATION OVERLAY
   ============================================================ */
.nav__mobile-overlay {
  position: fixed;
  inset: 0;
  top: var(--nav-height);
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 999;
  border-top: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-smooth);
  overflow-y: auto;
}

.nav__mobile-overlay.open {
  transform: translateX(0);
}

.nav__mobile-menu {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.nav__mobile-menu a {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--duration-base);
}

.nav__mobile-menu a:hover {
  color: var(--text-primary);
  background: var(--bg-glass-light);
}

/* ============================================================
   25. RESPONSIVE — TABLET (< 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__description { margin: 0 auto var(--space-8); }
  .hero__stats { justify-content: center; }
  .hero__actions { justify-content: center; }
  .hero__tags { justify-content: center; }
  .hero__visual { display: none; }

  .about__grid { grid-template-columns: 1fr; }
  .case-studies__grid { grid-template-columns: 1fr; }
  .cs-card--featured { flex-direction: column; grid-column: span 1; }
  .cs-card--featured .cs-card__image { min-height: 200px; }

  .ux-guidelines__grid { grid-template-columns: 1fr 1fr; }
  .frontend__grid { grid-template-columns: 1fr; }
  .skills__container { grid-template-columns: 1fr; gap: var(--space-10); }

  /* New sections — tablet */
  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .process__steps { grid-template-columns: repeat(2, 1fr); }
  .process__steps::before { display: none; }
  .tools__grid { grid-template-columns: repeat(2, 1fr); }

  .resume__layout { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }

  .nav__menu { display: none; }
  .nav__hamburger { display: flex; }
  .nav__actions .btn { display: none; }
}

/* ============================================================
   26. RESPONSIVE — MOBILE (< 640px)
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --space-32: 80px;
  }

  .section { padding: var(--space-20) 0; }
  .section-title { font-size: clamp(24px, 6vw, 36px); }
  .section-subtitle { font-size: 16px; }

  .hero__headline { font-size: clamp(32px, 8vw, 48px); }
  .hero__description { font-size: 16px; }
  .hero__stats { flex-direction: column; gap: var(--space-4); text-align: center; }
  .hero__actions { flex-direction: column; align-items: center; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .philosophy-grid { grid-template-columns: 1fr; }
  .ux-guidelines__grid { grid-template-columns: 1fr; }
  .skill-rings { grid-template-columns: repeat(2, 1fr); }
  .color-swatches { grid-template-columns: repeat(3, 1fr); }

  /* New sections — mobile */
  .skills__grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .skill-card { padding: 20px 16px; }
  .process__steps { grid-template-columns: 1fr; gap: 16px; }
  .process__steps::before { display: none; }
  .process__step { flex-direction: row; align-items: flex-start; gap: 16px; }
  .process__step-dot { width: 44px; height: 44px; font-size: 12px; flex-shrink: 0; }
  .tools__grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .tool-card { padding: 20px 16px; }

  .contact__form { padding: var(--space-6); }
  .form-row { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  .footer__bottom-links { flex-wrap: wrap; justify-content: center; }

  .resume-exp__item { grid-template-columns: 1fr; gap: var(--space-2); }
  .resume-exp__period { font-size: 10px; }

  .trust-bar__logos { gap: var(--space-6); }
  .ds-tabs, .case-studies__filter { gap: var(--space-2); }

  .testimonial-card {
    width: calc(100% - var(--space-6));
    margin-right: var(--space-6);
  }
}

/* ============================================================
   27. FOCUS & ACCESSIBILITY
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .hero__orb { animation: none; }
  .hero__mockup { animation: none; }
}