/* =====================================================
   SoundCanvas — style.css
   Dark neon aesthetic | Syne + Space Mono
   ===================================================== */

:root {
  --bg-deep:    #07080f;
  --bg-card:    rgba(255,255,255,0.04);
  --border:     rgba(255,255,255,0.08);
  --neon-a:     #00ffe7;
  --neon-b:     #b400ff;
  --neon-c:     #ff2d78;
  --text-primary: #f0f0f8;
  --text-muted:   rgba(240,240,248,0.45);
  --font-display: 'Syne', sans-serif;
  --font-mono:    'Space Mono', monospace;
  --radius:       14px;
  --glow-a:       0 0 18px rgba(0,255,231,0.45);
  --glow-b:       0 0 18px rgba(180,0,255,0.4);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-display);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated BG gradient mesh */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 50% at 10% 20%, rgba(0,255,231,0.07) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 90% 80%, rgba(180,0,255,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 55% 10%, rgba(255,45,120,0.05) 0%, transparent 70%),
    var(--bg-deep);
  animation: bgShift 12s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0%   { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(30deg); }
}

/* ── Navbar ── */
.navbar {
  border-bottom: 1px solid var(--border);
  background: rgba(7,8,15,0.85);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--neon-a), var(--neon-b));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mode-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--neon-a);
  border: 1px solid var(--neon-a);
  padding: 2px 8px;
  border-radius: 4px;
  opacity: 0.8;
}

.btn-outline-glow {
  color: var(--text-primary);
  border-color: var(--border);
  background: transparent;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.btn-outline-glow:hover {
  border-color: var(--neon-a);
  color: var(--neon-a);
  box-shadow: var(--glow-a);
}

/* ── Hero ── */
.hero-section {
  padding: 5rem 1rem 3rem;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--neon-a) 0%, var(--neon-b) 50%, var(--neon-c) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite alternate;
}

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

.hero-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ── Upload / Drop Zone ── */
.upload-section { max-width: 640px; }

.drop-zone {
  border: 2px dashed rgba(0,255,231,0.25);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.drop-zone::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,255,231,0.04) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--neon-a);
  box-shadow: var(--glow-a), inset 0 0 40px rgba(0,255,231,0.04);
}

.drop-zone:hover::after,
.drop-zone.drag-over::after { opacity: 1; }

.drop-zone.drag-over { transform: scale(1.01); }

.drop-icon {
  font-size: 3rem;
  color: var(--neon-a);
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 0 10px rgba(0,255,231,0.5));
  animation: iconPulse 2.5s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.drop-primary {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.drop-secondary {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.btn-glow {
  background: linear-gradient(135deg, var(--neon-a), var(--neon-b));
  color: #000;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1.5rem;
  transition: all 0.2s;
}
.btn-glow:hover {
  box-shadow: 0 0 20px rgba(0,255,231,0.6);
  transform: translateY(-1px);
}

/* File info */
.file-info-pill {
  margin-top: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--neon-a);
  text-align: center;
  backdrop-filter: blur(8px);
}

.separator {
  margin: 0 0.6rem;
  opacity: 0.4;
}

/* Loading */
.loading-wrap {
  margin-top: 1rem;
  text-align: center;
}
.loading-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.08em;
}
.loading-bar-track {
  height: 3px;
  border-radius: 4px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.loading-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--neon-a), var(--neon-b));
  width: 0%;
  transition: width 0.3s;
  animation: loadingAnim 1.5s ease-in-out infinite;
}
@keyframes loadingAnim {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* ── Canvas ── */
.canvas-section { max-width: 900px; }

.canvas-wrapper {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--border);
  box-shadow: 0 0 40px rgba(0,255,231,0.06), 0 8px 40px rgba(0,0,0,0.6);
  aspect-ratio: 16/7;
}

#vizCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-idle-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 3rem;
  color: rgba(255,255,255,0.06);
  pointer-events: none;
  transition: opacity 0.4s;
}

.canvas-idle-overlay p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.1);
}

.canvas-idle-overlay.hidden { opacity: 0; }

/* ── Controls ── */
.controls-section { max-width: 640px; }

.controls-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  backdrop-filter: blur(12px);
}

.time-display {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
  color: var(--neon-a);
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.time-sep { margin: 0 0.4rem; opacity: 0.4; }

/* Range inputs */
.range-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: rgba(255,255,255,0.1);
  outline: none;
  cursor: pointer;
  transition: background 0.2s;
}
.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--neon-a);
  box-shadow: 0 0 8px var(--neon-a);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.range-input::-webkit-slider-thumb:hover {
  transform: scale(1.3);
  box-shadow: 0 0 14px var(--neon-a);
}
.range-input::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: 50%;
  background: var(--neon-a);
  box-shadow: 0 0 8px var(--neon-a);
  cursor: pointer;
}

.seek-wrap { padding: 0.25rem 0; }

/* Playback buttons */
.ctrl-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}
.ctrl-btn:hover {
  border-color: var(--neon-a);
  color: var(--neon-a);
  box-shadow: var(--glow-a);
  transform: scale(1.08);
}
.ctrl-btn-play {
  width: 62px;
  height: 62px;
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--neon-a), var(--neon-b));
  color: #000 !important;
  border: none;
  box-shadow: 0 0 20px rgba(0,255,231,0.35);
}
.ctrl-btn-play:hover {
  box-shadow: 0 0 30px rgba(0,255,231,0.65);
  transform: scale(1.1);
  color: #000 !important;
  border: none;
}
.ctrl-btn-pause {
  width: 62px;
  height: 62px;
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--neon-b), var(--neon-c));
  color: #fff !important;
  border: none;
  box-shadow: 0 0 20px rgba(180,0,255,0.35);
}
.ctrl-btn-pause:hover {
  box-shadow: 0 0 30px rgba(180,0,255,0.65);
  transform: scale(1.1);
}

.volume-row { padding: 0.25rem 0; }
.vol-icon { color: var(--text-muted); font-size: 1rem; flex-shrink: 0; }
.volume-range { max-width: 200px; }

/* ── Snapshot button ── */
.btn-snapshot {
  background: transparent;
  border: 1px solid rgba(255,45,120,0.5);
  color: var(--neon-c);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  padding: 0.65rem 2rem;
  border-radius: 50px;
  transition: all 0.2s;
}
.btn-snapshot:hover {
  background: rgba(255,45,120,0.1);
  border-color: var(--neon-c);
  box-shadow: 0 0 20px rgba(255,45,120,0.4);
  color: var(--neon-c);
  transform: translateY(-1px);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.3);
}
.footer-name {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-name strong { color: var(--neon-a); }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.04em;
  margin: 0;
}

/* ── Utilities ── */
.d-none { display: none !important; }

/* ── Fullscreen canvas ── */
.canvas-wrapper:fullscreen,
.canvas-wrapper:-webkit-full-screen {
  aspect-ratio: unset;
  height: 100vh;
  width: 100vw;
  border-radius: 0;
}

/* ── Particles canvas (behind main canvas) ── */
#particleCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ── Responsive ── */
@media (max-width: 576px) {
  .hero-title { font-size: 2.2rem; }
  .controls-card { padding: 1.25rem 1rem; }
  .volume-range { max-width: 130px; }
}