/* ================================================================
   MANAS DASARI — PORTFOLIO DESIGN SYSTEM
   ================================================================ */

/* ── Google Fonts imported in HTML ── */

/* ── 1. DESIGN TOKENS ─────────────────────────────────────────── */
:root {
  --bg:          #060b18;
  --surface:     #0d1117;
  --card:        #111827;
  --card-hover:  #151f30;
  --border:      rgba(255, 255, 255, 0.07);
  --border-hover:rgba(99, 102, 241, 0.45);

  --text:        #f1f5f9;
  --muted:       #8b949e;
  --dim:         #4b5563;

  --accent:      #6366f1;
  --accent-light:#818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --cyan:        #06b6d4;
  --cyan-glow:   rgba(6, 182, 212, 0.18);

  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --gradient-card:    linear-gradient(145deg, rgba(99,102,241,0.08) 0%, rgba(6,182,212,0.04) 100%);

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);

  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   24px;

  --nav-height:  68px;
  --max-width:   1100px;

  --font-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --transition:  0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

a:hover { color: var(--cyan); }

::selection {
  background: var(--accent);
  color: white;
}

/* ── 3. SCROLLBAR ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── 4. NAVIGATION ────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(6, 11, 24, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.navbar.scrolled {
  background: rgba(6, 11, 24, 0.97);
  border-bottom-color: rgba(99, 102, 241, 0.2);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text) !important;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo .logo-dot {
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: inline-block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.1);
}

.nav-cta {
  background: var(--gradient-primary) !important;
  color: white !important;
  padding: 0.45rem 1rem !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  box-shadow: var(--shadow-glow);
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  color: white !important;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--muted);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--accent-light);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--accent-light);
}

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(6, 11, 24, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
  z-index: 999;
  transform: translateY(-10px);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
  pointer-events: none;
}

.nav-mobile.open {
  display: block;
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-mobile ul a {
  display: block;
  color: var(--muted);
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
}

.nav-mobile ul a:hover,
.nav-mobile ul a.active {
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.08);
}

/* ── 5. LAYOUT UTILITIES ──────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page-body {
  padding-top: calc(var(--nav-height) + 4rem);
  padding-bottom: 6rem;
}

.section {
  margin-bottom: 5rem;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 3px;
  height: 16px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  line-height: 1.6;
}

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* ── 6. CARDS ─────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

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

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

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

.card > * { position: relative; z-index: 1; }

/* ── 7. BUTTONS ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
  line-height: 1;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  color: white;
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
}

.btn-ghost:hover {
  color: var(--accent-light);
  border-color: var(--border-hover);
  background: rgba(99, 102, 241, 0.06);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.85rem 1.85rem;
  font-size: 1rem;
}

/* ── 8. TAGS / BADGES ─────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-light);
  border: 1px solid rgba(99, 102, 241, 0.2);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.tag-cyan {
  background: rgba(6, 182, 212, 0.1);
  color: var(--cyan);
  border-color: rgba(6, 182, 212, 0.2);
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ── 9. HERO SECTION ──────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: var(--nav-height) 0 4rem;
}

/* Animated background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: float 8s ease-in-out infinite alternate;
}

.hero-bg-blob:nth-child(1) {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.5) 0%, transparent 70%);
  top: -200px;
  left: -100px;
}

.hero-bg-blob:nth-child(2) {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6,182,212,0.4) 0%, transparent 70%);
  bottom: -100px;
  right: -50px;
  animation-delay: -4s;
  animation-direction: alternate-reverse;
}

.hero-bg-blob:nth-child(3) {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(139,92,246,0.3) 0%, transparent 70%);
  top: 40%;
  left: 50%;
  animation-delay: -2s;
}

@keyframes float {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, 40px) scale(1.08); }
}

/* Grid dots overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
}

.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero-name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.hero-title .highlight {
  color: var(--accent-light);
  font-weight: 600;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.hero-stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ── 10. PAGE HERO (non-home) ─────────────────────────────────── */
.page-hero {
  padding: calc(var(--nav-height) + 3.5rem) 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4rem;
}

.page-hero .container {
  max-width: var(--max-width);
}

/* ── 11. PROJECT CARDS ────────────────────────────────────────── */
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.project-card-header {
  height: 180px;
  background: var(--gradient-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.project-card-header .card-number {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--dim);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.project-card-header .card-icon {
  font-size: 2.5rem;
  filter: drop-shadow(0 4px 12px rgba(99,102,241,0.4));
}

.project-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.project-card-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1.25rem;
}

.project-card-footer {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.01);
}

/* ── 12. FEATURED PROJECT PREVIEW ─────────────────────────────── */
.featured-projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.25rem;
}

/* ── 13. SKILLS PAGE ──────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.skill-category {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-category:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.skill-category-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.skill-category-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.83rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  font-family: var(--font-mono);
}

.skill-pill:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--accent-light);
}

/* ── 14. ABOUT PAGE ───────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}

.about-sidebar .avatar-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-primary);
  padding: 3px;
  margin-bottom: 1.5rem;
}

.about-sidebar .avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.about-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about-info-list li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.about-info-list .info-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.about-info-list .info-value {
  font-size: 0.9rem;
  color: var(--text);
}

.about-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text);
}

.about-content p {
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

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

/* ── 15. TIMELINE ─────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 1.75rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, transparent 100%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.45rem;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.timeline-org {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── 16. RESUME PAGE ──────────────────────────────────────────── */
.resume-hero {
  text-align: center;
  padding: 3rem 1.5rem;
}

.resume-preview {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  max-width: 700px;
  margin: 0 auto 3rem;
  text-align: center;
}

.resume-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  filter: drop-shadow(0 8px 20px rgba(99,102,241,0.3));
}

.resume-preview h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.resume-preview p {
  color: var(--muted);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

/* ── 17. CONTACT PAGE ─────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.contact-link:hover {
  border-color: var(--border-hover);
  background: var(--card-hover);
  transform: translateX(4px);
  color: var(--text);
}

.contact-link-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-link-icon.email  { background: rgba(99,102,241,0.12); }
.contact-link-icon.github { background: rgba(255,255,255,0.05); }
.contact-link-icon.linkedin { background: rgba(6,182,212,0.1); }

.contact-link-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.contact-link-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.contact-link-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}

.contact-link-arrow {
  margin-left: auto;
  color: var(--dim);
  font-size: 1rem;
  transition: transform var(--transition);
}

.contact-link:hover .contact-link-arrow {
  transform: translateX(4px);
  color: var(--accent-light);
}

/* ── 18. PROJECT DETAIL ───────────────────────────────────────── */
.project-detail-hero {
  padding: calc(var(--nav-height) + 3rem) 0 3rem;
}

.project-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.project-breadcrumb a {
  color: var(--muted);
}

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

.project-breadcrumb .sep { color: var(--dim); }

.project-detail-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.project-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.project-detail-meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.detail-section {
  margin-bottom: 2.5rem;
}

.detail-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.detail-section h3::before {
  content: '';
  width: 3px;
  height: 16px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.detail-section p {
  color: var(--muted);
  line-height: 1.75;
  font-size: 0.95rem;
}

/* Architecture pipeline */
.pipeline {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.pipeline-node {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.7rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  text-align: center;
  width: 100%;
  max-width: 240px;
  transition: border-color var(--transition), background var(--transition);
}

.pipeline-node:hover {
  border-color: var(--border-hover);
  background: var(--card-hover);
  color: var(--accent-light);
}

.pipeline-node.highlight {
  border-color: rgba(99,102,241,0.4);
  background: rgba(99,102,241,0.08);
  color: var(--accent-light);
}

.pipeline-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0.3rem 0;
  color: var(--dim);
  font-size: 0.9rem;
  gap: 2px;
}

.pipeline-connector .pipe-line {
  width: 2px;
  height: 12px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--cyan) 100%);
  border-radius: 2px;
}

/* Detail sidebar */
.detail-sidebar .card {
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.detail-sidebar h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.detail-sidebar .btn {
  width: 100%;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.detail-sidebar .btn:last-child {
  margin-bottom: 0;
}

/* ── 19. FOOTER ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: rgba(0,0,0,0.2);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--muted);
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--dim);
  font-family: var(--font-mono);
}

/* ── 20. UTILITY CLASSES ──────────────────────────────────────── */
.text-accent  { color: var(--accent-light); }
.text-muted   { color: var(--muted); }
.text-cyan    { color: var(--cyan); }
.mono         { font-family: var(--font-mono); }
.divider      { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Two-column responsive grid */
.two-col-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 700px) {
  .two-col-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

.stagger.visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: none; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.12s; opacity: 1; transform: none; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.19s; opacity: 1; transform: none; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.26s; opacity: 1; transform: none; }
.stagger.visible > *:nth-child(5) { transition-delay: 0.33s; opacity: 1; transform: none; }

/* ── 21. RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .detail-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero-name {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat-value {
    font-size: 1.4rem;
  }

  .page-body {
    padding-top: calc(var(--nav-height) + 2.5rem);
    padding-bottom: 4rem;
  }

  .section {
    margin-bottom: 3.5rem;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 1.1rem; }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .grid-2,
  .grid-3,
  .skills-grid,
  .featured-projects {
    grid-template-columns: 1fr;
  }

  .resume-preview {
    padding: 2rem 1.25rem;
  }
}