/* ============================================================
   Nick Ding — Portfolio Design System
   Dark + light mode · Static HTML/CSS/JS
   ============================================================ */

/* --- Tokens (dark default) --------------------------------- */
:root {
  color-scheme: dark;

  /* Surfaces */
  --bg-primary:     #0A0B0F;
  --bg-secondary:   #12131A;
  --bg-tertiary:    #1A1B25;
  --bg-glass:       rgba(10, 11, 15, 0.82);

  /* Borders */
  --border-primary: rgba(255, 255, 255, 0.06);
  --border-hover:   rgba(255, 255, 255, 0.12);
  --border-active:  rgba(124, 92, 252, 0.35);

  /* Text */
  --text-primary:   #EDEDF0;
  --text-secondary: #8B8D98;
  --text-tertiary:  #5C5E6A;

  /* Accent — Violet */
  --accent:         #7C5CFC;
  --accent-hover:   #9178FF;
  --accent-glow:    rgba(124, 92, 252, 0.15);
  --accent-subtle:  rgba(124, 92, 252, 0.08);

  /* Project accents */
  --sieve:          #3B82F6;
  --sieve-subtle:   rgba(59, 130, 246, 0.12);
  --convoy:         #10B981;
  --convoy-subtle:  rgba(16, 185, 129, 0.12);

  /* Gradients */
  --gradient-hero:  linear-gradient(135deg, #7C5CFC 0%, #3B82F6 50%, #10B981 100%);
  --gradient-glow:  radial-gradient(ellipse 60% 40% at 50% 0%, rgba(124, 92, 252, 0.10) 0%, transparent 70%);

  /* Shadows */
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg:  0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 60px rgba(124, 92, 252, 0.12);

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

  /* Spacing — 4/8dp rhythm */
  --space-1: 4px;   --space-2: 8px;   --space-3: 12px;
  --space-4: 16px;  --space-5: 20px;  --space-6: 24px;
  --space-8: 32px;  --space-10: 40px; --space-12: 48px;
  --space-16: 64px; --space-20: 80px; --space-24: 96px;

  /* Type */
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", "Fira Code", monospace;

  /* Motion */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:   cubic-bezier(0.45, 0, 0.55, 1);
  --dur-fast:      150ms;
  --dur-base:      250ms;
  --dur-slow:      400ms;

  /* Layout */
  --max-width: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

/* --- Light Theme ------------------------------------------- */
[data-theme="light"] {
  color-scheme: light;

  --bg-primary:     #FAFBFD;
  --bg-secondary:   #FFFFFF;
  --bg-tertiary:    #F0F1F5;
  --bg-glass:       rgba(250, 251, 253, 0.85);

  --border-primary: rgba(0, 0, 0, 0.08);
  --border-hover:   rgba(0, 0, 0, 0.14);
  --border-active:  rgba(124, 92, 252, 0.30);

  --text-primary:   #1A1B25;
  --text-secondary: #5C5E6A;
  --text-tertiary:  #8B8D98;

  --accent:         #6B46E5;
  --accent-hover:   #5A35D4;
  --accent-glow:    rgba(107, 70, 229, 0.10);
  --accent-subtle:  rgba(107, 70, 229, 0.06);

  --sieve:          #2563EB;
  --sieve-subtle:   rgba(37, 99, 235, 0.08);
  --convoy:         #059669;
  --convoy-subtle:  rgba(5, 150, 105, 0.08);

  --gradient-hero:  linear-gradient(135deg, #6B46E5 0%, #2563EB 50%, #059669 100%);
  --gradient-glow:  radial-gradient(ellipse 60% 40% at 50% 0%, rgba(107, 70, 229, 0.06) 0%, transparent 70%);

  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg:  0 12px 40px rgba(0, 0, 0, 0.10);
  --shadow-glow: 0 0 60px rgba(107, 70, 229, 0.08);
}


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

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

body {
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: rgba(124, 92, 252, 0.15);
  transition: background-color var(--dur-slow) var(--ease-out),
              color var(--dur-slow) var(--ease-out);
}

a {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

[id] {
  scroll-margin-top: 96px;
}


/* --- Focus & Accessibility --------------------------------- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 100;
  transform: translateY(-200%);
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  transition: transform var(--dur-base) var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 2px;
}


/* --- Typography -------------------------------------------- */
h1, h2, h3, h4, p {
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-wrap: balance;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.tagline {
  font-size: clamp(1.15rem, 2.5vw, 1.75rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--text-secondary);
  max-width: 640px;
}

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

.mono {
  font-family: var(--font-mono);
}


/* --- Layout ------------------------------------------------ */
.container {
  width: min(var(--max-width), calc(100% - var(--space-8)));
  margin: 0 auto;
}

.section {
  padding: var(--space-20) 0;
}

.section-header {
  margin-bottom: var(--space-12);
}


/* --- Header ------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: var(--space-4) var(--gutter);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-primary);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}

.site-header.scrolled {
  border-color: var(--border-hover);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  color: var(--text-primary);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  position: relative;
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--dur-fast) var(--ease-out);
}

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

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--dur-base) var(--ease-out);
}

.site-nav a:hover::after {
  width: 100%;
}


/* --- Ambient Background ------------------------------------ */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  will-change: transform;
}

.ambient-orb-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  left: -100px;
  background: var(--accent);
  animation: orbFloat1 20s ease-in-out infinite;
}

.ambient-orb-2 {
  width: 500px;
  height: 500px;
  top: 40%;
  right: -150px;
  background: var(--sieve);
  animation: orbFloat2 25s ease-in-out infinite;
}

.ambient-orb-3 {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: 30%;
  background: var(--convoy);
  animation: orbFloat3 22s ease-in-out infinite;
}

[data-theme="light"] .ambient-orb { opacity: 0.12; }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, var(--text-tertiary) 0.5px, transparent 0.5px);
  background-size: 32px 32px;
  opacity: 0.08;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 20%, transparent 70%);
}

[data-theme="light"] .grid-overlay { opacity: 0.06; }


/* --- Scroll Progress --------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-hero);
  z-index: 100;
  transition: width 60ms linear;
}


/* --- Hero -------------------------------------------------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(120px, 18vh, 200px) 0 var(--space-16);
  overflow: hidden;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-3);
  background: var(--accent-subtle);
  border: 1px solid rgba(124, 92, 252, 0.15);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--convoy);
  animation: dotPulse 2s ease-in-out infinite;
}

.hero h1 {
  position: relative;
  margin-bottom: var(--space-6);
  font-size: clamp(2.75rem, 6.5vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
}

.hero-line {
  display: block;
}

.animated-gradient {
  background: linear-gradient(
    135deg,
    #7C5CFC 0%,
    #3B82F6 25%,
    #10B981 50%,
    #3B82F6 75%,
    #7C5CFC 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 4s ease-in-out infinite;
}

[data-theme="light"] .animated-gradient {
  background: linear-gradient(
    135deg,
    #6B46E5 0%,
    #2563EB 25%,
    #059669 50%,
    #2563EB 75%,
    #6B46E5 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 4s ease-in-out infinite;
}

.hero .tagline {
  position: relative;
  margin: 0 auto var(--space-10);
  max-width: 580px;
}

.hero-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.hero-scroll-hint {
  margin-top: var(--space-4);
}

.scroll-mouse {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-tertiary);
  border-radius: 14px;
  position: relative;
  opacity: 0.5;
  animation: hintFade 3s ease-in-out infinite;
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--text-tertiary);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 2s ease-in-out infinite;
}


/* --- Buttons ----------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all var(--dur-base) var(--ease-out);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(124,92,252,0.4), rgba(59,130,246,0.3), rgba(16,185,129,0.3));
  z-index: -1;
  filter: blur(12px);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}

.btn-glow:hover::after {
  opacity: 1;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn svg {
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn:hover svg {
  transform: translateY(2px);
}

.btn .arrow {
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn:hover .arrow {
  transform: translateX(3px);
}


/* --- Project Cards ----------------------------------------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.project-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur-base) var(--ease-out),
              transform 0.5s var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
  will-change: transform;
}

.project-card:hover {
  border-color: var(--border-active);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Spotlight effect — positioned by JS */
.card-spotlight {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  border-radius: inherit;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(124, 92, 252, 0.06),
    transparent 40%
  );
}

.project-card:hover .card-spotlight {
  opacity: 1;
}

.project-card[data-project="sieve"] .card-spotlight {
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(59, 130, 246, 0.06),
    transparent 40%
  );
}

.project-card[data-project="convoy"] .card-spotlight {
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(16, 185, 129, 0.06),
    transparent 40%
  );
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--accent));
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  z-index: 2;
}

.project-card:hover::before {
  opacity: 1;
  transform: scaleX(1);
}

.project-card[data-project="sieve"] {
  --card-accent: var(--sieve);
}

.project-card[data-project="convoy"] {
  --card-accent: var(--convoy);
}

.project-media {
  position: relative;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  min-height: 220px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
}

.project-media img {
  aspect-ratio: 760 / 420;
  border-radius: var(--radius-sm);
}

.project-body {
  padding: var(--space-6);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
}

.tag-active {
  background: var(--accent-subtle);
  color: var(--accent);
}

.tag-sieve {
  background: var(--sieve-subtle);
  color: var(--sieve);
}

.tag-convoy {
  background: var(--convoy-subtle);
  color: var(--convoy);
}

.tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-1);
}

.project-subtitle {
  color: var(--text-tertiary);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.project-desc {
  margin-bottom: var(--space-5);
  line-height: 1.65;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: gap var(--dur-fast) var(--ease-out);
}

.project-link:hover {
  gap: var(--space-3);
}


/* --- Approach / How I Build -------------------------------- */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.approach-card {
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-base) var(--ease-out),
              transform 0.5s var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
  will-change: transform;
}

.approach-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.approach-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-4);
  background: var(--accent-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent);
}

.approach-card h3 {
  margin-bottom: var(--space-3);
}

.approach-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
}


/* --- Project Hero (Case Study Pages) ----------------------- */
.project-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-16) 0 var(--space-12);
}

.project-hero-content .eyebrow {
  margin-bottom: var(--space-4);
}

.project-hero-content h1 {
  margin-bottom: var(--space-3);
}

.project-hero-content .positioning {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.project-hero-content .summary {
  color: var(--text-tertiary);
  margin-bottom: var(--space-8);
  max-width: 560px;
  line-height: 1.65;
}

.project-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero-diagram {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}


/* --- Detail Grid (Case Study Overview) --------------------- */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.detail-card {
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
}

.detail-card h2 {
  font-size: 1.125rem;
  margin-bottom: var(--space-3);
}

.detail-card p {
  font-size: 0.9375rem;
  line-height: 1.65;
}


/* --- Case Study Sections ----------------------------------- */
.case-study {
  display: grid;
  gap: var(--space-6);
}

.case-grid {
  display: grid;
  gap: var(--space-5);
}

.case-grid.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.case-grid.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.case-panel {
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
}

.case-panel h3 {
  margin-bottom: var(--space-3);
}

.case-panel p {
  font-size: 0.9375rem;
  line-height: 1.65;
}

.case-panel.wide {
  max-width: none;
}


/* --- Lists (Case Studies) ---------------------------------- */
.styled-list {
  display: grid;
  gap: var(--space-2);
  padding-left: var(--space-5);
  list-style: disc;
}

.styled-list li {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.styled-list li::marker {
  color: var(--text-tertiary);
}

.step-list {
  display: grid;
  gap: var(--space-3);
  padding-left: var(--space-5);
  list-style: decimal;
  counter-reset: none;
}

.step-list li {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.step-list li strong {
  color: var(--text-primary);
}


/* --- Tech Stack Tags --------------------------------------- */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}


/* --- Media Reel -------------------------------------------- */
.media-reel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
}

.media-reel video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
}

.media-reel-content {
  display: grid;
  gap: var(--space-3);
}

.media-reel-content h3 {
  font-size: 1.25rem;
}

.media-reel-content p {
  font-size: 0.9375rem;
  line-height: 1.65;
}

.media-note {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}


/* --- Footer ------------------------------------------------ */
.site-footer {
  padding: var(--space-10) 0 var(--space-12);
  border-top: 1px solid var(--border-primary);
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

.footer-links a {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--dur-fast) var(--ease-out);
}

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

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}


/* --- Eyebrow Line ------------------------------------------ */
.eyebrow-line {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: var(--space-2);
}


/* --- Animations -------------------------------------------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeUpScale {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50%      { background-position: 100% center; }
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.8); }
}

@keyframes scrollWheel {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  50%  { opacity: 0; transform: translateX(-50%) translateY(12px); }
  100% { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes hintFade {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 0.2; }
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33%      { transform: translate(60px, 40px) rotate(120deg); }
  66%      { transform: translate(-30px, 80px) rotate(240deg); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33%      { transform: translate(-70px, -30px) rotate(120deg); }
  66%      { transform: translate(40px, -60px) rotate(240deg); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33%      { transform: translate(50px, -50px) rotate(120deg); }
  66%      { transform: translate(-60px, 20px) rotate(240deg); }
}

@keyframes pageEntrance {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body {
  animation: pageEntrance 0.8s var(--ease-out) both;
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
}

.reveal.visible {
  animation: fadeUpScale 0.7s var(--ease-out) forwards;
}

.reveal-delay-1 { animation-delay: 120ms; }
.reveal-delay-2 { animation-delay: 240ms; }
.reveal-delay-3 { animation-delay: 360ms; }
.reveal-delay-4 { animation-delay: 480ms; }


/* --- Responsive -------------------------------------------- */
@media (max-width: 820px) {
  .header-inner {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .approach-grid {
    grid-template-columns: 1fr;
  }

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

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

  .case-grid.two-col,
  .case-grid.three-col {
    grid-template-columns: 1fr;
  }

  .media-reel {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .hero {
    padding: clamp(80px, 12vh, 120px) 0 var(--space-12);
  }

  .ambient-orb { filter: blur(80px); }
  .ambient-orb-1 { width: 400px; height: 400px; }
  .ambient-orb-2 { width: 300px; height: 300px; }
  .ambient-orb-3 { width: 250px; height: 250px; }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - var(--space-6), var(--max-width));
  }

  .site-nav {
    gap: var(--space-4);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

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

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


/* --- Theme Toggle ------------------------------------------ */
.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-primary);
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}

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

.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform var(--dur-base) var(--ease-out);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

/* Show/hide icons based on theme */
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }

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

/* Smooth theme transition for key elements */
.site-header,
.project-card,
.approach-card,
.case-panel,
.detail-card,
.media-reel {
  transition: background-color var(--dur-slow) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              color var(--dur-slow) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}


/* --- Reduced Motion ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .ambient-orb,
  .scroll-mouse,
  .hero-scroll-hint {
    display: none;
  }
}