/* ============================================
   LUCINEER.COM — Slackwater Game Framework
   Maritime salvage yard meets AI workshop
   ============================================ */

:root {
  --bg: #0E1A1C;
  --bg-deep: #081113;
  --bg-card: #142328;
  --bg-card-hover: #1A2D33;
  --amber: #D4A055;
  --amber-dim: #A07E42;
  --amber-glow: rgba(212, 160, 85, 0.15);
  --tide: #5FB4C7;
  --tide-dim: #4589A0;
  --tide-glow: rgba(95, 180, 199, 0.15);
  --fog: #B8C5C9;
  --fog-dim: #7A8A8E;
  --rust: #B85C3A;
  --copper: #C77B4A;
  --serif: Georgia, 'Times New Roman', Cambria, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
  --maxw: 1200px;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--fog);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--amber); color: var(--bg-deep); }

a { color: var(--tide); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--amber); }

img { max-width: 100%; height: auto; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--amber-dim); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--amber); }

/* ============================================
   NAVIGATION
   ============================================ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(14, 26, 28, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 160, 85, 0.1);
  transition: padding var(--transition);
}

nav .nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav .logo {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--amber);
  letter-spacing: 0.05em;
}

nav .logo span { color: var(--tide); }

nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav .nav-links a {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fog-dim);
  transition: color var(--transition);
}

nav .nav-links a:hover { color: var(--amber); }

nav .nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--amber);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  nav .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg-deep);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
  }
  nav .nav-links.open { display: flex; }
  nav .nav-toggle { display: block; }
}

/* ============================================
   HERO
   ============================================ */
#hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-deep);
}

#hero-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

#hero .hero-content {
  position: relative;
  z-index: 2;
  padding: 2rem;
  max-width: 800px;
}

#hero .hero-pre {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--tide-dim);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s ease forwards;
}

#hero h1 {
  font-family: var(--serif);
  font-size: clamp(3rem, 10vw, 6.5rem);
  font-weight: normal;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--fog);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s ease forwards;
}

#hero h1 .accent { color: var(--amber); font-style: italic; }

#hero .tagline {
  font-family: var(--serif);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-style: italic;
  color: var(--fog-dim);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s ease forwards;
}

#hero .cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2.2rem;
  background: transparent;
  border: 1.5px solid var(--amber);
  border-radius: 50px;
  color: var(--amber);
  font-family: var(--sans);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  opacity: 0;
  animation: fadeUp 0.8s 0.8s ease forwards;
}

#hero .cta:hover {
  background: var(--amber);
  color: var(--bg-deep);
  box-shadow: 0 0 40px var(--amber-glow);
}

#hero .audio-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: 0.75rem;
  color: var(--fog-dim);
  opacity: 0.5;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#hero .audio-hint svg { width: 14px; height: 14px; }

/* Music toggle in hero */
.music-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 50;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.music-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--amber);
  transform: scale(1.05);
}

.music-btn.playing {
  background: var(--amber);
  color: var(--bg-deep);
  animation: pulse-music 2s ease infinite;
}

@keyframes pulse-music {
  0%, 100% { box-shadow: 0 0 0 0 var(--amber-glow); }
  50% { box-shadow: 0 0 0 12px transparent; }
}

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

/* ============================================
   SECTION BASE
   ============================================ */
section {
  padding: 6rem 2rem;
  position: relative;
}

.section-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--tide-dim);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: normal;
  color: var(--fog);
  margin-bottom: 1rem;
  line-height: 1.15;
}

.section-title .accent { color: var(--amber); font-style: italic; }

.section-sub {
  font-size: 1.05rem;
  color: var(--fog-dim);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ============================================
   ERAS TIMELINE
   ============================================ */
#eras {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.eras-scroll {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding: 1rem 0 2rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--amber-dim) transparent;
}

.eras-scroll::-webkit-scrollbar { height: 6px; }
.eras-scroll::-webkit-scrollbar-track { background: transparent; }
.eras-scroll::-webkit-scrollbar-thumb { background: var(--amber-dim); border-radius: 3px; }

.era-card {
  flex: 0 0 320px;
  height: 420px;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  scroll-snap-align: start;
  background: var(--bg-card);
  border: 1px solid rgba(212, 160, 85, 0.08);
  transition: all var(--transition);
}

.era-card:hover {
  border-color: var(--amber);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 30px var(--amber-glow);
}

.era-card .era-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  transition: opacity var(--transition);
}

.era-card:hover .era-bg { opacity: 0.55; }

.era-card .era-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(14,26,28,0.7) 50%, var(--bg-deep) 100%);
  z-index: 1;
}

.era-card .era-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 2;
  padding: 1.5rem;
}

.era-card .era-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--tide);
  margin-bottom: 0.4rem;
}

.era-card .era-name {
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--fog);
  margin-bottom: 0.5rem;
}

.era-card .era-desc {
  font-size: 0.85rem;
  color: var(--fog-dim);
  line-height: 1.4;
}

.era-card .era-play {
  position: absolute;
  top: 1rem; right: 1rem;
  z-index: 3;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(14,26,28,0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  opacity: 0;
}

.era-card:hover .era-play { opacity: 1; }

.era-card .era-play:hover {
  background: var(--amber);
  color: var(--bg-deep);
}

.era-card .era-play.playing {
  background: var(--amber);
  color: var(--bg-deep);
  opacity: 1;
  animation: pulse-music 1.5s ease infinite;
}

/* ============================================
   FRAMEWORK SECTION
   ============================================ */
#framework {
  background: var(--bg-deep);
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.fw-card {
  background: var(--bg-card);
  border: 1px solid rgba(212, 160, 85, 0.06);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.fw-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--amber);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.fw-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(212, 160, 85, 0.2);
  transform: translateY(-2px);
}

.fw-card:hover::before { transform: scaleY(1); }

.fw-card .fw-icon {
  width: 40px; height: 40px;
  margin-bottom: 1rem;
  color: var(--tide);
}

.fw-card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: normal;
  color: var(--fog);
  margin-bottom: 0.5rem;
}

.fw-card .fw-mono {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--amber-dim);
  margin-bottom: 0.75rem;
}

.fw-card p {
  font-size: 0.9rem;
  color: var(--fog-dim);
  line-height: 1.5;
}

.fw-card a {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--tide-dim);
}

/* ============================================
   DEMOS
   ============================================ */
#demos {
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid rgba(95, 180, 199, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.demo-card:hover { border-color: rgba(95, 180, 199, 0.2); }

.demo-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(95, 180, 199, 0.06);
}

.demo-header h3 {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: normal;
  color: var(--amber);
  margin-bottom: 0.25rem;
}

.demo-header p {
  font-size: 0.8rem;
  color: var(--fog-dim);
}

.demo-canvas-wrap {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.demo-canvas-wrap canvas {
  background: var(--bg-deep);
  border-radius: 8px;
  cursor: crosshair;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
  touch-action: none;
}

.demo-controls {
  padding: 0.75rem 1rem 1.25rem;
  width: 100%;
  max-width: 300px;
}

.demo-controls label {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fog-dim);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}

.demo-controls label span { color: var(--amber); }

.demo-controls input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  background: var(--bg-deep);
  border-radius: 2px;
  outline: none;
}

.demo-controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--amber);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.demo-controls input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.demo-controls input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--amber);
  cursor: pointer;
  border: none;
}

.demo-readout {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--tide);
  margin-top: 0.5rem;
  text-align: center;
}

/* ============================================
   CREW
   ============================================ */
#crew {
  background: var(--bg-deep);
}

.crew-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.crew-card {
  background: var(--bg-card);
  border: 1px solid rgba(212, 160, 85, 0.06);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.crew-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.crew-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.crew-card:hover::after { transform: scaleX(1); }

.crew-avatar {
  width: 64px; height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--amber-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--amber);
}

.crew-card h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: normal;
  color: var(--fog);
  margin-bottom: 0.2rem;
}

.crew-card .crew-model {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--tide-dim);
  margin-bottom: 0.75rem;
}

.crew-card .crew-role {
  font-style: italic;
  color: var(--amber);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.crew-card .crew-desc {
  font-size: 0.8rem;
  color: var(--fog-dim);
  line-height: 1.4;
}

.crew-card .crew-instrument {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fog-dim);
  opacity: 0.6;
}

/* ============================================
   WRITINGS
   ============================================ */
#writings {
  background: var(--bg);
}

.writings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.writing-card {
  background: var(--bg-card);
  border: 1px solid rgba(212, 160, 85, 0.06);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
}

.writing-card:hover {
  border-color: var(--amber-dim);
  transform: translateY(-2px);
}

.writing-card .writing-icon {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--amber);
  opacity: 0.4;
  margin-bottom: 0.5rem;
}

.writing-card h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: normal;
  color: var(--fog);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.writing-card p {
  font-size: 0.85rem;
  color: var(--fog-dim);
  margin-bottom: 1rem;
  font-style: italic;
}

.writing-card a {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================
   OPEN SOURCE
   ============================================ */
#opensource {
  background: var(--bg-deep);
}

.repos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.repo-card {
  background: var(--bg-card);
  border: 1px solid rgba(95, 180, 199, 0.06);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.repo-card:hover {
  border-color: var(--tide-dim);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.repo-card .repo-name {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--amber);
}

.repo-card .repo-desc {
  font-size: 0.8rem;
  color: var(--fog-dim);
  flex: 1;
}

.repo-card .repo-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--fog-dim);
}

.repo-card .repo-stars {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.repo-card .repo-lang {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--tide-dim);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background: var(--bg);
  padding: 3rem 2rem 2rem;
  border-top: 1px solid rgba(212, 160, 85, 0.08);
  text-align: center;
}

footer .footer-tag {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--fog-dim);
  margin-bottom: 1.5rem;
}

footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

footer .footer-links a {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fog-dim);
}

footer .footer-copy {
  font-size: 0.75rem;
  color: var(--fog-dim);
  opacity: 0.5;
}

footer .footer-anchor {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

/* ============================================
   UTILITIES
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 768px) {
  section { padding: 4rem 1.25rem; }
  .section-sub { margin-bottom: 2rem; }
  .demo-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}