/* ============================================================
   PORTFOLIO — EM PRABHATH MALINDA WICKRAMARATHNE
   Premium Design System & Styles
   ============================================================ */

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

/* ── CSS Variables ────────────────────────────────────────── */
:root {
  /* Background layers */
  --bg-primary:        #0a0a0f;
  --bg-secondary:      #101018;
  --bg-surface:        #16161f;
  --bg-surface-hover:  #1c1c28;
  --bg-elevated:       #1e1e2a;

  /* Text */
  --text-primary:      #f0f0f5;
  --text-secondary:    #a0a0b8;
  --text-muted:        #6b6b80;
  --text-inverse:      #0a0a0f;

  /* Accents */
  --accent-violet:     #7c3aed;
  --accent-violet-rgb: 124, 58, 237;
  --accent-blue:       #3b82f6;
  --accent-blue-rgb:   59, 130, 246;
  --accent-cyan:       #06b6d4;
  --accent-cyan-rgb:   6, 182, 212;

  /* Gradients */
  --gradient-primary:  linear-gradient(135deg, var(--accent-violet), var(--accent-blue));
  --gradient-subtle:   linear-gradient(135deg, rgba(var(--accent-violet-rgb), .15), rgba(var(--accent-blue-rgb), .08));
  --gradient-glow:     radial-gradient(ellipse at center, rgba(var(--accent-violet-rgb), .12) 0%, transparent 70%);

  /* Borders */
  --border-primary:    rgba(255, 255, 255, .06);
  --border-hover:      rgba(255, 255, 255, .12);
  --border-accent:     rgba(var(--accent-violet-rgb), .3);

  /* Shadows */
  --shadow-sm:         0 1px 2px rgba(0,0,0,.3);
  --shadow-md:         0 4px 16px rgba(0,0,0,.4);
  --shadow-lg:         0 8px 32px rgba(0,0,0,.5);
  --shadow-glow:       0 0 40px rgba(var(--accent-violet-rgb), .15);

  /* Radii */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --radius-full: 9999px;

  /* Spacing */
  --section-gap:  160px;
  --container-max: 1200px;
  --container-px:  24px;

  /* Transitions */
  --ease-out:    cubic-bezier(.16, 1, .3, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-fast:    .2s;
  --dur-normal:  .4s;
  --dur-slow:    .7s;

  /* Typography */
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-body);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(var(--accent-violet-rgb), .3);
  color: var(--text-primary);
}

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

img { max-width: 100%; display: block; }
button { border: none; background: none; cursor: pointer; font: inherit; color: inherit; }
ul, ol { list-style: none; }

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--accent-violet);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .particles-canvas,
  .hero-visual-canvas { display: none; }
}

/* ── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.section {
  position: relative;
  padding: var(--section-gap) 0;
}

.section-header {
  margin-bottom: 64px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent-violet);
  margin-bottom: 16px;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent-violet);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-top: 16px;
  line-height: 1.7;
}

/* ── Particles Canvas ─────────────────────────────────────── */
.particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: .4;
}

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--dur-normal) var(--ease-out);
}
.nav.scrolled {
  padding: 12px 0;
  background: rgba(10, 10, 15, .85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border-primary);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}
.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -.02em;
  position: relative;
}
.nav-logo .logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-violet);
  margin-left: 2px;
  vertical-align: super;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease-out);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent-violet);
  transition: width var(--dur-normal) var(--ease-out);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-full);
  transition: all var(--dur-normal) var(--ease-out);
}
.nav-cta:hover {
  background: rgba(var(--accent-violet-rgb), .1);
  border-color: var(--accent-violet);
  color: #fff;
}

/* Mobile nav toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 1010;
}
.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--dur-normal) var(--ease-out);
  transform-origin: center;
}
.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, .97);
  backdrop-filter: blur(24px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-out);
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu a {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
}
.mobile-menu a:hover { color: var(--text-primary); }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: -20%;
  width: 140%;
  height: 140%;
  background: var(--gradient-glow);
  opacity: .6;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: 580px;
}

/* Status badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 12px;
  font-size: .78rem;
  font-weight: 500;
  color: var(--accent-cyan);
  background: rgba(var(--accent-cyan-rgb), .08);
  border: 1px solid rgba(var(--accent-cyan-rgb), .2);
  border-radius: var(--radius-full);
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp .8s var(--ease-out) .3s forwards;
}
.hero-badge .pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(var(--accent-cyan-rgb), .4); }
  50%      { opacity: .7; box-shadow: 0 0 0 6px rgba(var(--accent-cyan-rgb), 0); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.12;
  letter-spacing: -.03em;
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp .8s var(--ease-out) .5s forwards;
}
.hero-title .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 24px;
  max-width: 500px;
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp .8s var(--ease-out) .7s forwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp .8s var(--ease-out) .9s forwards;
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 440px;
  opacity: 0;
  animation: fadeIn 1.2s var(--ease-out) .6s forwards;
}
@keyframes fadeIn { to { opacity: 1; } }

.hero-visual-canvas {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: .9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--accent-violet-rgb), .3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(var(--accent-violet-rgb), .4);
}
.btn-secondary {
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
  background: transparent;
}
.btn-secondary:hover {
  background: rgba(255,255,255,.05);
  border-color: rgba(255,255,255,.2);
  transform: translateY(-2px);
}
.btn .arrow {
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ── About ────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-text p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
}
.about-text p:first-child {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 500;
}
.about-highlight {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-primary);
}
.about-highlight-item {
  display: flex;
  flex-direction: column;
}
.about-highlight-value {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}
.about-highlight-label {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* About visual — tech diagram */
.about-visual {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  overflow: hidden;
}
.about-visual::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: .4;
}
.about-tech-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.about-tech-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-primary);
  transition: all var(--dur-normal) var(--ease-out);
}
.about-tech-row:hover {
  border-color: var(--border-accent);
  background: var(--bg-surface-hover);
  transform: translateX(6px);
}
.about-tech-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.about-tech-name {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.about-tech-desc {
  font-size: .78rem;
  color: var(--text-muted);
}
.about-tech-arrow {
  margin-left: auto;
  color: var(--text-muted);
  font-size: .7rem;
  transition: transform var(--dur-fast) var(--ease-out);
}
.about-tech-row:hover .about-tech-arrow {
  transform: translateX(4px);
  color: var(--accent-violet);
}

/* ── Skills ───────────────────────────────────────────────── */
.skills-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}
.skill-category {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.skill-category::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--dur-normal) var(--ease-out);
}
.skill-category:hover::before { opacity: 1; }
.skill-category:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.skill-category-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.skill-category-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.skill-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  cursor: default;
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
}
.skill-item:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
  background: rgba(var(--accent-violet-rgb), .08);
  transform: translateY(-2px);
}

/* Skill tooltip */
.skill-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) scale(.9);
  background: var(--bg-elevated);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  width: max-content;
  max-width: 240px;
  opacity: 0;
  pointer-events: none;
  transition: all var(--dur-fast) var(--ease-out);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}
.skill-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bg-elevated);
}
.skill-item:hover .skill-tooltip {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}
.skill-tooltip-cat {
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent-violet);
  margin-bottom: 4px;
}
.skill-tooltip-desc {
  font-size: .78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Capabilities ─────────────────────────────────────────── */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.capability-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  transition: all var(--dur-normal) var(--ease-out);
  overflow: hidden;
}
.capability-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.capability-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  opacity: 0;
  transition: opacity var(--dur-normal) var(--ease-out);
  pointer-events: none;
}
.capability-card:hover::after { opacity: 1; }
.capability-card:nth-child(1)::after { background: radial-gradient(circle, rgba(var(--accent-violet-rgb),.1) 0%, transparent 70%); }
.capability-card:nth-child(2)::after { background: radial-gradient(circle, rgba(var(--accent-blue-rgb),.1) 0%, transparent 70%); }
.capability-card:nth-child(3)::after { background: radial-gradient(circle, rgba(var(--accent-cyan-rgb),.1) 0%, transparent 70%); }
.capability-card:nth-child(4)::after { background: radial-gradient(circle, rgba(124,58,237,.08) 0%, rgba(59,130,246,.08) 50%, transparent 70%); }

.capability-num {
  font-family: var(--font-heading);
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent-violet);
  margin-bottom: 20px;
  letter-spacing: .05em;
}
.capability-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.capability-desc {
  font-size: .92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.capability-icon {
  position: absolute;
  top: 36px;
  right: 36px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: rgba(var(--accent-violet-rgb), .08);
  border: 1px solid rgba(var(--accent-violet-rgb), .15);
}

/* ── Projects ─────────────────────────────────────────────── */
.project-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: 56px;
  margin-bottom: 32px;
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.project-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  opacity: 0;
  transition: opacity var(--dur-normal) var(--ease-out);
}
.project-card:hover::before { opacity: .3; }

.project-info {
  position: relative;
  z-index: 1;
}

.project-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent-violet);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.project-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-violet);
}
.project-name {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.project-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.project-tech span {
  padding: 5px 12px;
  font-size: .75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
}
.project-links {
  display: flex;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: .82rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
  transition: all var(--dur-normal) var(--ease-out);
}
.project-link:hover {
  background: rgba(var(--accent-violet-rgb), .1);
  border-color: var(--accent-violet);
}
.project-link.primary {
  background: var(--gradient-primary);
  border: none;
  color: #fff;
}

/* Project visual */
.project-visual {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 32px;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.project-arch {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}
.project-arch-layer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--dur-normal) var(--ease-out);
}
.project-arch-layer:hover {
  border-color: var(--border-accent);
  transform: translateX(6px);
}
.arch-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.arch-label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-primary);
}
.arch-connector {
  width: 1px;
  height: 16px;
  background: var(--border-primary);
  margin-left: 22px;
}

/* ── Cloud & AI ───────────────────────────────────────────── */
.cloud-ai-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.cloud-ai-text h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.cloud-ai-text p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

/* Evolution path */
.evolution-path {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.evolution-step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  position: relative;
  transition: all var(--dur-normal) var(--ease-out);
}
.evolution-step:hover {
  background: rgba(var(--accent-violet-rgb), .05);
  border-radius: var(--radius-md);
}
.evolution-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--accent-violet);
  background: var(--bg-primary);
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  transition: all var(--dur-normal) var(--ease-out);
}
.evolution-step:hover .evolution-node {
  background: var(--accent-violet);
  box-shadow: 0 0 12px rgba(var(--accent-violet-rgb), .5);
}
.evolution-step:not(:last-child)::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 25px;
  width: 1px;
  height: calc(100% - 20px);
  background: linear-gradient(to bottom, var(--accent-violet), rgba(var(--accent-violet-rgb), .2));
}
.evolution-label {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.evolution-sublabel {
  font-size: .78rem;
  color: var(--text-muted);
}

/* Architecture diagram */
.arch-diagram {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  overflow: hidden;
}
.arch-diagram::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: .4;
}
.arch-diagram-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.arch-diagram-node {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--dur-normal) var(--ease-out);
}
.arch-diagram-node:hover {
  border-color: var(--border-accent);
  transform: translateX(6px);
}
.arch-node-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.arch-node-label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-primary);
}
.arch-node-desc {
  font-size: .75rem;
  color: var(--text-muted);
}
.arch-connector-v {
  display: flex;
  justify-content: center;
  padding: 2px 0;
}
.arch-connector-v .line {
  width: 1px;
  height: 20px;
  background: linear-gradient(to bottom, var(--accent-violet), rgba(var(--accent-blue-rgb), .4));
}

/* ── Journey / Timeline ───────────────────────────────────── */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent-violet), var(--accent-blue), rgba(var(--accent-cyan-rgb), .3));
}
.timeline-item {
  position: relative;
  padding-left: 64px;
  padding-bottom: 48px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-node {
  position: absolute;
  left: 16px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--accent-violet);
  background: var(--bg-primary);
  z-index: 2;
  transition: all var(--dur-normal) var(--ease-out);
}
.timeline-item:hover .timeline-node {
  background: var(--accent-violet);
  box-shadow: 0 0 16px rgba(var(--accent-violet-rgb), .5);
}
.timeline-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: all var(--dur-normal) var(--ease-out);
}
.timeline-card:hover {
  border-color: var(--border-accent);
  transform: translateX(8px);
  box-shadow: var(--shadow-glow);
}
.timeline-phase {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent-violet);
  margin-bottom: 8px;
}
.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.timeline-desc {
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Experience / Education ───────────────────────────────── */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.experience-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all var(--dur-normal) var(--ease-out);
  position: relative;
}
.experience-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.experience-type {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent-blue);
  margin-bottom: 12px;
}
.experience-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.experience-org {
  font-size: .9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.experience-desc {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Contact ──────────────────────────────────────────────── */
.contact {
  text-align: center;
}
.contact-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.contact-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: .9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
  transition: all var(--dur-normal) var(--ease-out);
}
.contact-link:hover {
  background: rgba(var(--accent-violet-rgb), .1);
  border-color: var(--accent-violet);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(var(--accent-violet-rgb), .15);
}
.contact-link.primary {
  background: var(--gradient-primary);
  border: none;
  color: #fff;
}
.contact-link.primary:hover {
  box-shadow: 0 8px 32px rgba(var(--accent-violet-rgb), .35);
}
.contact-details {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.contact-detail {
  text-align: center;
}
.contact-detail-label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.contact-detail-value {
  font-size: .95rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border-primary);
  text-align: center;
}
.footer-name {
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: .02em;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: .82rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.footer-copy {
  font-size: .75rem;
  color: var(--text-muted);
}

/* ── Reveal Animations ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.stagger > * { transition-delay: calc(var(--i, 0) * 80ms); }

/* ── Decorative grid background ───────────────────────────── */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

/* ── Noise texture overlay ────────────────────────────────── */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Section dividers ─────────────────────────────────────── */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  :root {
    --section-gap: 100px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-content { max-width: 100%; }
  .hero-visual { min-height: 360px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .cloud-ai-content { grid-template-columns: 1fr; gap: 48px; }
  .project-card { grid-template-columns: 1fr; gap: 32px; padding: 36px; }
  .capabilities-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 80px;
    --container-px: 20px;
  }
  .nav-links, .nav-cta { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-menu { display: flex; }

  .hero { min-height: auto; padding: 140px 0 80px; }
  .hero-title { font-size: clamp(1.8rem, 7vw, 2.6rem); }
  .hero-cta { flex-direction: column; gap: 12px; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .hero-visual { min-height: 280px; }

  .skills-categories { grid-template-columns: 1fr; }
  .about-highlight { flex-direction: column; gap: 20px; }
  .contact-details { flex-direction: column; gap: 24px; }
  .contact-links { flex-direction: column; align-items: center; }

  .project-card { padding: 28px 24px; }
  .experience-grid { grid-template-columns: 1fr; }

  .section-title { font-size: clamp(1.6rem, 5vw, 2.2rem); }
}

@media (max-width: 480px) {
  :root { --container-px: 16px; }
  .hero-badge { font-size: .72rem; }
  .capability-card { padding: 28px 24px; }
  .capability-icon { display: none; }
  .skill-category { padding: 24px 20px; }
  .timeline-item { padding-left: 52px; }
  .timeline-card { padding: 20px 24px; }
}