/* ================================================================
   layout.css — Page-level layout, sections, grid structures
================================================================ */

/* ── Scroll progress bar ─────────────────────────────────────── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--rainbow);
  background-size: 400% 400%;
  animation: rainbowShift 4s ease infinite;
  z-index: 10000;
  transition: width 0.1s linear;
}

/* ── Navigation ──────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 3px;
  left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  z-index: 1000;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--rainbow);
  background-size: 300% 300%;
  animation: rainbowShift 5s ease infinite;
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-counter {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  background: var(--color-faint);
  padding: 4px 10px;
  border-radius: 100px;
  letter-spacing: 0.05em;
}

.nav-konami-hint {
  font-size: 1rem;
  opacity: 0.3;
  transition: opacity var(--transition);
  cursor: none;
}

.nav-konami-hint:hover { opacity: 1; }

/* ── Hero ────────────────────────────────────────────────────── */
#hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--nav-h) var(--space-5) var(--space-8);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 1s ease 1.5s forwards, scrollHintBounce 2s ease 2.5s infinite;
}

/* ── Section base ────────────────────────────────────────────── */
.section {
  padding: var(--space-10) var(--space-5);
}

.section--rainbow {
  background: var(--rainbow);
  background-size: 400% 400%;
  animation: rainbowShift 8s ease infinite;
}

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

.section--centered {
  text-align: center;
  min-height: 50vh;
  display: flex;
  align-items: center;
}

.section--centered .section-inner {
  margin: 0 auto;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ── About grid ──────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ── Tracklist ───────────────────────────────────────────────── */
.tracklist {
  margin-top: var(--space-7);
  border-top: 1px solid rgba(0,0,0,0.1);
  padding-top: var(--space-5);
}

.tracklist-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  counter-reset: track;
}

.tracklist-items li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px var(--space-2) 14px 0;
  border-bottom: 1px solid var(--color-subtle);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-muted);
  transition: color var(--transition), background var(--transition);
  padding-left: var(--space-5);
  position: relative;
  cursor: none;
}

.tracklist-items li::before {
  counter-increment: track;
  content: counter(track, decimal-leading-zero);
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-subtle);
}

.tracklist-items li::after {
  content: attr(data-duration);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-subtle);
  margin-left: var(--space-2);
}

.tracklist-items li:hover {
  color: var(--color-text);
}

/* ── Live empty ──────────────────────────────────────────────── */
.live-empty {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: rgba(0,0,0,0.7);
  max-width: 600px;
  margin: 0 auto;
  font-style: italic;
}

/* ── Footer ──────────────────────────────────────────────────── */
footer {
  padding: var(--space-6) var(--space-5);
  border-top: 1px solid var(--color-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: 0.05em;
}

/* ── Matrix canvas ───────────────────────────────────────────── */
#matrix-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 4000;
  pointer-events: none;
  display: none;
  opacity: 0.85;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .tracklist-items { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  nav { padding: 0 var(--space-3); }
  .nav-links { display: none; }
  footer { flex-direction: column; gap: var(--space-2); text-align: center; }
}