/* ============================================================
   GLY3D Studio — Apple-inspired design system
   ============================================================ */
:root {
  /* Colors */
  --color-void-black: #ffffff;
  --color-pure-white: #1d1d1f;
  --color-charcoal: #f5f5f7;
  --color-graphite: #d2d2d7;
  --color-lamp-cream: #0071e3;
  --color-lamp-cream-hover: #0077ed;
  --color-smoke: #6e6e73;
  --color-on-dark: #ffffff;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;

  --text-label-sm: 11px;
  --text-body: 16px;
  --text-body-lg: 20px;
  --text-subheading: 30px;
  --text-heading: 54px;
  --text-heading-lg: 57px;
  --text-display: 56px;

  /* Spacing */
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-28: 28px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-64: 64px;
  --spacing-80: 80px;
  --spacing-96: 96px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 112px;

  /* Radius */
  --radius-cards: 18px;
  --radius-badges: 9999px;
  --radius-inputs: 12px;
  --radius-buttons: 9999px;

  /* Shadows */
  --shadow-xl: rgba(0, 0, 0, 0.25) 0px 10px 30px 0px;
  --shadow-lg: rgba(0, 0, 0, 0.1) 0px 4px 20px 0px;

  --ease: cubic-bezier(0.625, 0.05, 0, 1);
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-void-black);
  color: var(--color-pure-white);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
em {
  font-family: inherit;
  font-style: normal;
  font-weight: inherit;
  color: var(--color-lamp-cream);
}

.container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-24);
}

section { position: relative; }

/* ============================================================
   Typography helpers
   ============================================================ */
.eyebrow {
  display: block;
  font-size: var(--text-label-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-smoke);
  margin-bottom: var(--spacing-16);
}
.label-sm {
  font-size: var(--text-label-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.section-heading {
  font-weight: 300;
  font-size: var(--text-heading);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-pure-white);
}
.section-sub {
  font-size: var(--text-body-lg);
  line-height: 1.5;
  color: var(--color-smoke);
  max-width: 620px;
  margin-top: var(--spacing-16);
}
.lede { font-size: var(--text-body-lg); color: var(--color-pure-white) !important; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  border-radius: var(--radius-buttons);
  font-size: var(--text-body);
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease), opacity 0.25s var(--ease);
}
.btn-primary {
  background: var(--color-lamp-cream);
  color: var(--color-void-black);
  border: none;
  padding: 15px 24px;
  box-shadow: var(--shadow-lg);
}
.btn-primary:hover { background: var(--color-lamp-cream-hover); }
.btn-ghost {
  background: transparent;
  color: var(--color-pure-white);
  border: 1px solid var(--color-graphite);
  padding: 14px 20px;
}
.btn-ghost:hover { border-color: var(--color-pure-white); }
.btn-block { width: 100%; }

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--spacing-24) 0;
  transition: background-color 0.3s var(--ease), padding 0.3s var(--ease), border-color 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--spacing-16) 0;
  border-bottom: 1px solid var(--color-graphite);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.01em;
}
.brand-logo {
  display: block;
  height: 75px;
  width: auto;
  transition: filter 0.3s var(--ease);
}
.nav .brand-logo { transition: filter 0.3s var(--ease), height 0.3s var(--ease); }
.nav.scrolled .brand-logo { filter: invert(1); height: 48px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-32);
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  transition: color 0.2s var(--ease), text-shadow 0.2s var(--ease);
}
.nav-link:hover { color: rgba(255, 255, 255, 0.7); }
.nav.scrolled .nav-link {
  color: var(--color-pure-white);
  text-shadow: none;
}
.nav.scrolled .nav-link:hover { color: var(--color-smoke); }

.nav-actions { display: flex; align-items: center; gap: var(--spacing-16); }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-buttons);
  width: 44px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav.scrolled .nav-toggle {
  border-color: var(--color-graphite);
  color: var(--color-pure-white);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.6s ease;
}
.hero-bg-slide.is-active { opacity: 1; }

.hero-play {
  position: absolute;
  z-index: 1;
  right: var(--spacing-24);
  bottom: var(--spacing-40);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-12);
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
  transition: opacity 0.5s var(--ease);
}
.hero-play-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.8);
  background: rgba(0, 0, 0, 0.25);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.hero-play:hover .hero-play-circle { background: rgba(0, 0, 0, 0.4); border-color: #ffffff; }

/* ============================================================
   Sections generic
   ============================================================ */
.section { padding: var(--section-gap) 0; }
.section-head { margin-bottom: var(--spacing-64); max-width: 720px; }

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-64);
  align-items: start;
}
.about-copy { display: flex; flex-direction: column; gap: var(--spacing-20); }
.about-copy p { color: var(--color-smoke); font-size: var(--text-body); line-height: 1.5; }
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
}
.stat-card {
  background: var(--color-charcoal);
  border-radius: var(--radius-cards);
  padding: var(--spacing-32);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}
.stat-number {
  font-weight: 500;
  font-size: var(--text-heading);
  letter-spacing: -0.02em;
  color: var(--color-lamp-cream);
}
.stat-label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--color-smoke);
}

/* ============================================================
   Services
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
}
.service-card {
  background: var(--color-charcoal);
  border-radius: var(--radius-cards);
  padding: var(--spacing-40) var(--spacing-32);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
}
.service-index {
  font-size: var(--text-label-sm);
  color: var(--color-smoke);
  letter-spacing: 0.05em;
}
.service-title {
  font-weight: 500;
  font-size: var(--text-subheading);
  letter-spacing: -0.01em;
  color: var(--color-pure-white);
}
.service-desc { color: var(--color-smoke); font-size: var(--text-body); }
.service-list { display: flex; flex-direction: column; gap: var(--spacing-12); margin-top: var(--spacing-8); border-top: 1px solid var(--color-graphite); padding-top: var(--spacing-16); }
.service-list li {
  position: relative;
  padding-left: var(--spacing-16);
  font-size: 14px;
  color: var(--color-smoke);
  line-height: 1.5;
}
.service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-lamp-cream);
}

/* ============================================================
   Portfolio
   ============================================================ */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-24);
}
.portfolio-tile {
  position: relative;
  border-radius: var(--radius-cards);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-24);
  isolation: isolate;
}
.portfolio-img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--color-charcoal);
  transition: transform 0.5s var(--ease);
}
.portfolio-tile:hover .portfolio-img { transform: scale(1.04); }
.portfolio-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.65) 100%);
}
.badge {
  position: absolute;
  top: var(--spacing-16);
  right: var(--spacing-16);
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  color: var(--color-on-dark);
  border-radius: var(--radius-badges);
  padding: 8px 16px;
  font-size: var(--text-label-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: var(--shadow-xl);
}
.portfolio-title {
  font-weight: 500;
  font-size: var(--text-body-lg);
  color: var(--color-on-dark);
}

/* ============================================================
   Process strip
   ============================================================ */
.process-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-24);
}
.process-step { display: flex; flex-direction: column; gap: var(--spacing-12); padding-top: var(--spacing-24); border-top: 1px solid var(--color-graphite); }
.process-num { font-size: var(--text-label-sm); color: var(--color-smoke); font-weight: 500; letter-spacing: 0.05em; }
.process-title { font-weight: 500; font-size: var(--text-body-lg); color: var(--color-pure-white); }
.process-desc { font-size: 14px; color: var(--color-smoke); }

/* ============================================================
   Contact
   ============================================================ */
.contact-solo {
  max-width: 520px;
  margin: var(--spacing-96) auto 0;
  padding-top: var(--spacing-96);
  border-top: 1px solid var(--color-graphite);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-20);
}
.contact-solo .section-heading { font-size: 36px; }
.contact-solo p { color: var(--color-smoke); font-size: var(--text-body); max-width: 400px; }
.contact-methods { display: flex; flex-direction: column; gap: 0; margin-top: var(--spacing-8); width: 100%; }
.contact-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-16) 0;
  border-top: 1px solid var(--color-graphite);
}
.contact-method:last-child { border-bottom: 1px solid var(--color-graphite); }
.contact-method-label { font-size: var(--text-label-sm); color: var(--color-smoke); text-transform: uppercase; letter-spacing: 0.05em; }
.contact-method-value { font-size: var(--text-body-lg); font-weight: 500; color: var(--color-pure-white); }

/* ============================================================
   Footer
   ============================================================ */
.footer { border-top: 1px solid var(--color-graphite); padding: var(--section-gap) 0 var(--spacing-40); }
.footer-headline {
  font-weight: 300;
  font-size: var(--text-heading-lg);
  letter-spacing: -0.02em;
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-64);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-24);
  padding-top: var(--spacing-32);
  border-top: 1px solid var(--color-graphite);
  flex-wrap: wrap;
}
.footer-links { display: flex; gap: var(--spacing-24); flex-wrap: wrap; }
.footer-links a { font-size: 14px; color: var(--color-smoke); transition: color 0.2s var(--ease); }
.footer-links a:hover { color: var(--color-pure-white); }
.footer-copy { font-size: var(--text-label-sm); color: var(--color-smoke); }

/* ============================================================
   Reveal-on-scroll
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  :root { --text-display: 42px; --text-heading: 42px; --text-heading-lg: 42px; }
  .about-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .process-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-actions .btn-primary { display: none; }
  .hero-play { display: none; }
  .process-strip { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* Mobile nav panel */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--color-void-black);
  display: none;
  flex-direction: column;
  padding: 100px var(--spacing-24) var(--spacing-32);
  gap: var(--spacing-8);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-size: 28px;
  font-weight: 300;
  padding: var(--spacing-16) 0;
  border-bottom: 1px solid var(--color-graphite);
  color: var(--color-pure-white);
}
.mobile-nav .btn { margin-top: var(--spacing-24); }