/* ==========================================================================
   NABIN KHADKA — PORTFOLIO DESIGN SYSTEM & STYLES (v3.0)
   Obsessively Crafted • Cinematic Motion • Responsive Obsidian & Ivory
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Open+Sans:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Roboto:wght@300;400;500;700&display=swap');

:root {
  /* --- DARK MODE PALETTE (Default) --- */
  --bg: #040508;
  --bg-alt: #0a0d14;
  --bg-card: rgba(14, 18, 30, 0.45);
  --bg-card-hover: rgba(20, 26, 44, 0.7);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(110, 247, 214, 0.4);
  --text: #f3f6fc;
  --text-muted: #9baac4;
  --text-muted-darker: #6b7c96;
  
  /* Accent Colors */
  --primary: #5eead4; /* Teal */
  --secondary: #a78bfa; /* Violet */
  --accent: #f43f5e; /* Rose */
  --glow: rgba(94, 234, 212, 0.15);
  --glow-secondary: rgba(167, 139, 250, 0.12);
  
  /* Gradient Combinations */
  --grad-primary: linear-gradient(135deg, #5eead4 0%, #a78bfa 50%, #f43f5e 100%);
  --grad-glow: linear-gradient(110deg, #5eead4 0%, #a78bfa 33%, #f43f5e 66%, #fbbf24 100%);
  --grad-card: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0) 100%);

  /* --- COMMON TOKENS --- */
  --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
  --font-text: 'Open Sans', system-ui, -apple-system, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-mono: 'Roboto', 'Courier New', monospace;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  --nav-h: 80px;
  --container-max: 1200px;
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --ease-elastic: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- LIGHT MODE PALETTE OVERRIDES --- */
[data-theme="light"] {
  --bg: #f8f6f0; /* Ivory Gallery */
  --bg-alt: #f0ede4;
  --bg-card: rgba(240, 237, 228, 0.55);
  --bg-card-hover: rgba(230, 226, 214, 0.85);
  --border: rgba(17, 24, 39, 0.09);
  --border-hover: rgba(124, 58, 237, 0.4);
  --text: #171c26;
  --text-muted: #5e6b84;
  --text-muted-darker: #8b99b0;
  
  --primary: #7c3aed; /* Royal Purple */
  --secondary: #0d9488; /* Sea Teal */
  --accent: #db2777; /* Magenta */
  --glow: rgba(124, 58, 237, 0.08);
  --glow-secondary: rgba(13, 148, 136, 0.08);
  
  --grad-primary: linear-gradient(135deg, #7c3aed 0%, #0d9488 50%, #db2777 100%);
  --grad-glow: linear-gradient(110deg, #7c3aed 0%, #0d9488 33%, #db2777 66%, #ea580c 100%);
  --grad-card: linear-gradient(180deg, rgba(17, 24, 39, 0.015) 0%, rgba(17, 24, 39, 0) 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  overflow-x: hidden;
}

body {
  font-family: var(--font-text);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.6s ease, color 0.6s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

button, input, textarea {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted-darker);
}

/* Selection */
::selection {
  background: var(--primary);
  color: var(--bg);
}

/* --- LAYOUT UTILITIES --- */
.container {
  width: min(calc(100% - 48px), var(--container-max));
  margin-inline: auto;
}

.section {
  padding: clamp(80px, 10vw, 160px) 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* --- CINEMATIC AMBIENCE LAYERS --- */
#noise {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: 0.038;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

#vignette {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 40%, rgba(3, 4, 7, 0.4) 100%);
  transition: opacity 0.5s ease;
}

#spotlight {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3;
  mix-blend-mode: screen;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), var(--glow), transparent 60%);
  transition: background 0.05s ease-out;
}

/* --- PAGE LOADER --- */
#loader {
  position: fixed;
  inset: 0;
  background-color: var(--bg);
  z-index: 9999;
  display: grid;
  place-items: center;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.8s;
}

#loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 20px;
  letter-spacing: -0.05em;
  animation: logoBreathe 2.5s ease-in-out infinite;
}

.loader-track {
  width: 160px;
  height: 2px;
  background: var(--border);
  border-radius: var(--radius-full);
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}

.loader-progress {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--grad-glow);
  animation: loadProgress 2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes logoBreathe {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.05); filter: brightness(1.15); }
}

@keyframes loadProgress {
  to { width: 100%; }
}

/* --- TYPOGRAPHY & HEADER Kickers --- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--primary);
  margin-bottom: 20px;
  font-weight: 600;
}

.kicker::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--primary);
}

.display-heading {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin-bottom: 24px;
}

.display-heading em {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shimmerMove 6s linear infinite;
}

.lede-text {
  font-size: clamp(1.1rem, 1.5vw, 1.4rem);
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.6;
  margin-bottom: 40px;
}

/* --- HEADER / NAVIGATION --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(var(--bg), 0.7);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom-color: var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.navbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shimmerMove 6s linear infinite;
}

.brand-glyph {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--grad-primary);
  display: grid;
  place-items: center;
  color: #000;
  font-weight: 800;
  box-shadow: 0 4px 15px var(--glow);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: var(--text);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Switcher Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: var(--transition-smooth);
}

.theme-toggle:hover {
  background: var(--bg-card);
  border-color: var(--text-muted);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.theme-toggle .sun-icon { display: none; }
[data-theme="light"] .theme-toggle .sun-icon { display: block; }
[data-theme="light"] .theme-toggle .moon-icon { display: none; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text);
  transition: var(--transition-smooth);
}

/* Mobile Dropdown Panel */
.mobile-nav {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(var(--bg), 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 99;
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

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

.mobile-nav .nav-link {
  font-size: 1.1rem;
  padding: 12px 0;
}

/* --- BUTTON SYSTEM --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--grad-primary);
  color: #040508;
  box-shadow: 0 8px 30px var(--glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px var(--glow);
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-3px);
}

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

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 5;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.pill-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--primary);
  animation: glowPulse 2s infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.5; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-title .glow-text {
  display: block;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmerMove 5s linear infinite;
  background-size: 250% auto;
}

@keyframes shimmerMove {
  0% { background-position: 0% center; }
  100% { background-position: 250% center; }
}

/* --- AMBIENT FLOATING ORBS (BACKGROUND AESTHETIC) --- */
.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(94,234,212,0.07) 0%, transparent 70%);
  border-radius: 50%;
  top: -100px;
  right: -100px;
  animation: orbFloat 12s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(167,139,250,0.09) 0%, transparent 70%);
  border-radius: 50%;
  bottom: 50px;
  left: -80px;
  animation: orbFloat 15s ease-in-out infinite reverse;
  pointer-events: none;
  z-index: 0;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 25px) scale(0.97); }
}

.hero-desc {
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Hero Avatar / Frame */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.avatar-frame {
  width: min(380px, 95%);
  aspect-ratio: 0.85;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.3);
  transform: perspective(1000px) rotateY(-8deg) rotateX(4deg);
  transition: transform 0.3s ease;
}

.avatar-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(10%) contrast(1.05);
}

.avatar-glow {
  position: absolute;
  inset: -20%;
  z-index: -1;
  background: conic-gradient(from 180deg, var(--glow), var(--glow-secondary), var(--glow));
  filter: blur(40px);
  animation: slowSpin 25s linear infinite;
}

@keyframes slowSpin {
  to { transform: rotate(360deg); }
}

.hero-tag {
  position: absolute;
  background: rgba(var(--bg), 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  animation: floatAnim 6s ease-in-out infinite;
}

.hero-tag.tag-top {
  top: -10px;
  left: -20px;
  animation-delay: 0.5s;
}

.hero-tag.tag-bottom {
  bottom: 20px;
  right: -25px;
  animation-delay: 1.5s;
}

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

/* --- ABOUT SECTION --- */
.about-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  position: relative;
  z-index: 5;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.about-p {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
}

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

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shimmerMove 4s linear infinite;
  margin-bottom: 8px;
}

.stat-label {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* --- EXPERTISE / SKILLS SECTION --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 56px;
}

.skill-card {
  position: relative;
  padding: 40px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.skill-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.skill-card:hover {
  transform: translateY(-8px);
  border-color: transparent;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

.skill-icon {
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: var(--primary);
}

.skill-icon svg {
  width: 24px;
  height: 24px;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.skill-card:hover .skill-icon svg {
  transform: rotate(15deg) scale(1.2);
}

.skill-card:hover .skill-icon {
  background: rgba(94, 234, 212, 0.06);
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow);
}

.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.skill-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- PROJECTS / PORTFOLIO --- */
.portfolio-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 56px;
}

.portfolio-filters {
  display: flex;
  gap: 12px;
  list-style: none;
}

.filter-btn {
  padding: 10px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
}

.project-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
}

.project-media {
  aspect-ratio: 1.6;
  width: 100%;
  overflow: hidden;
  position: relative;
  background: #000;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.project-meta {
  padding: 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-category {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  font-weight: 700;
}

.project-meta h3 {
  font-family: var(--font-ui);
  font-size: 1.4rem;
  margin-bottom: 12px;
  line-height: 1.3;
}

.project-meta p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 24px;
  flex: 1;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  width: fit-content;
}

.project-link:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* --- PLAYGROUND / LABORATORY SECTION --- */
.playground-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  align-items: stretch;
  margin-top: 56px;
}

.sandbox-viewer {
  position: relative;
  background: #000;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-height: 480px;
  overflow: hidden;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.6);
}

#sandbox-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.sandbox-stats {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(20, 20, 20, 0.7);
  backdrop-filter: blur(8px);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  pointer-events: none;
}

.sandbox-controls {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sandbox-controls h3 {
  font-family: var(--font-ui);
  font-size: 1.3rem;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.control-header label {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.control-header span {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 600;
}

.control-group input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  background: var(--border);
  height: 4px;
  border-radius: var(--radius-full);
  outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform 0.15s ease;
  box-shadow: 0 0 8px var(--primary);
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.color-palette-options {
  display: flex;
  gap: 12px;
}

.color-pill {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition-smooth);
}

.color-pill.active {
  border-color: var(--text);
  transform: scale(1.15);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.15);
}

.btn-reset {
  margin-top: 10px;
}

@media (max-width: 1024px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
}

/* --- CONTACT SECTION --- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-meta small {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.contact-meta strong {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  color: var(--text);
}

/* Contact Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.15);
  font-family: var(--font-text);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

[data-theme="light"] .form-group input, [data-theme="light"] .form-group textarea {
  background: rgba(255,255,255,0.5);
}

.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.contact-form .btn {
  grid-column: 1 / -1;
  justify-content: center;
}

/* --- FOOTER & MARQUEE --- */
.marquee-wrap {
  width: 100vw;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 24px 0;
  white-space: nowrap;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.marquee-content {
  display: inline-block;
  animation: marqueeRun 40s linear infinite;
  padding-left: 100%;
}

.marquee-content span {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-right: 56px;
  color: var(--text-muted-darker);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

@keyframes marqueeRun {
  0% { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}

.footer {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shimmerMove 6s linear infinite;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-top-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.footer-top-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-4px);
}

/* --- INTERACTIVE ENTRANCE REVEALS --- */
.reveal {
  opacity: 0;
  transform: translateY(36px) scale(0.97);
  transition:
    opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

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

/* Stagger reveals */
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal-delay-4 { transition-delay: 0.48s; }
.reveal-delay-5 { transition-delay: 0.60s; }

/* --- GLOBAL AESTHETIC KEYFRAME LIBRARY --- */

/* Floating badge drift */
@keyframes floatDrift {
  0%, 100% { transform: translateY(0px) rotate(-1deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

/* Soft pulsing ring around elements */
@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 var(--glow); }
  70% { box-shadow: 0 0 0 14px rgba(94, 234, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(94, 234, 212, 0); }
}

/* Text slide up from bottom (for hero chars) */
@keyframes textSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Slow border sweep */
@keyframes borderGlow {
  0%, 100% { border-color: var(--border); }
  50% { border-color: var(--primary); box-shadow: 0 0 20px var(--glow); }
}

/* Gentle scale breathe */
@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

/* Infinite color cycle */
@keyframes colorCycle {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

/* Apply animated border-glow to contact cards on hover */
.contact-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 8px 32px var(--glow);
}

/* Stat cards subtle breathe animation */
.stat-card:hover {
  animation: borderGlow 2s ease infinite;
  transform: translateY(-4px);
}

/* Pill dot pulse ring */
.pill-dot {
  animation: glowPulse 2s infinite, pulseRing 2.5s infinite;
}

/* Hero badge float animation override */
.hero-tag {
  animation: floatDrift 7s ease-in-out infinite !important;
}
.hero-tag.tag-top { animation-delay: 0s !important; }
.hero-tag.tag-bottom { animation-delay: 2s !important; }

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  
  .hero-pill, .hero-ctas {
    justify-content: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .about-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  
  .contact-info {
    order: 1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .portfolio-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  
  .portfolio-filters {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  
  .contact-form {
    padding: 32px;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 3.2rem;
  }
  
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }
  
  .project-grid {
    grid-template-columns: 1fr;
  }
}