/* ═══════════════════════════════════════════════════════════════
   AZ-TØNE WAVE MACHINE — styles.css                     v0.0.2

   Token system:
     --clr-bg          #050509      Matte black
     --clr-surface     #0e0e16      Card surface
     --clr-surface-2   #14141f      Elevated surface
     --clr-border      #1e1e32      Subtle border          --clr-border-glow #3b2d6e      Glowing border (hover)
     --clr-purple-hi   #a855f7      Primary neon purple                                                          --clr-purple-mid  #8b5cf6      Mid purple (buttons)
     --clr-purple-lo   #5b21b6      Deep purple
     --clr-purple-dim  #3b2d6e      Dim purple (borders, glows)
     --clr-text        #e8e8f0      Primary text
     --clr-text-2      #9898b0      Secondary text         --clr-text-3      #555570      Muted text
     --clr-play        #22c55e      Play green accent
     --clr-stop        #ef4444      Stop red accent

   Typography:
     Display: system-ui fallback — tight letter-spacing, uppercase
     Body: same stack — readable at small sizes
     Mono: for times, counts
═══════════════════════════════════════════════════════════════ */

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

/* ── Custom Properties ──────────────────────────────────────── */
:root {
  --clr-bg:          #050509;
  --clr-surface:     #0e0e16;
  --clr-surface-2:   #14141f;
  --clr-border:      #1e1e32;
  --clr-border-glow: #3b2d6e;
  --clr-purple-hi:   #a855f7;
  --clr-purple-mid:  #8b5cf6;
  --clr-purple-lo:   #5b21b6;
  --clr-purple-dim:  #2a1d50;
  --clr-text:        #e8e8f0;
  --clr-text-2:      #9898b0;
  --clr-text-3:      #555570;
  --clr-play:        #22c55e;
  --clr-stop:        #ef4444;

  --radius-card:     16px;
  --radius-btn:      40px;
  --radius-input:    12px;

  --shadow-glow-sm:  0 0 12px #8b5cf640;
  --shadow-glow-md:  0 0 24px #8b5cf660, 0 0 48px #7c3aed30;
  --shadow-glow-lg:  0 0 32px #a855f780, 0 0 80px #7c3aed40;

  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-med:  280ms cubic-bezier(0.4, 0, 0.2, 1);

  --bottom-player-h: 100px;
  --header-h:        220px;
}

/* ── Base ───────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100dvh;
}

/* ── Ambient Background ─────────────────────────────────────── */
.background {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%,   #8b5cf618 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 20% 100%,  #5b21b614 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 80% 80%,   #7c3aed10 0%, transparent 55%);
  z-index: -2;
  pointer-events: none;
}

/* Subtle perspective grid — gives depth without noise */
.grid-overlay {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(#1e1e3208 1px, transparent 1px),
    linear-gradient(90deg, #1e1e3208 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: -1;
  pointer-events: none;
}

/* ── Header ─────────────────────────────────────────────────── */
.app-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 24px 32px;
  text-align: center;
}

/* Logo */
.logo {
  position: relative;
  width: 130px;
  height: 130px;
  flex-shrink: 0;
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid var(--clr-purple-mid);
  box-shadow:
    0 0 18px var(--clr-purple-mid),
    0 0 50px var(--clr-purple-lo),
    inset 0 0 20px #8b5cf610;
  animation: pulse-ring 3s ease-in-out infinite;
}

.beam {
  position: absolute;
  width: 180px;
  height: 3px;
  background: linear-gradient(90deg, transparent, #c084fc, #fff, #c084fc, transparent);
  top: 50%;
  left: -25px;
  transform: rotate(-30deg) translateY(-50%);
  box-shadow: 0 0 16px #c084fc, 0 0 32px #a855f770;
  animation: pulse-beam 3s ease-in-out infinite;
}

.center {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow:
    0 0 20px #fff,
    0 0 40px #c084fc,
    0 0 80px #a855f780;
}

@keyframes pulse-ring {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; box-shadow: 0 0 30px var(--clr-purple-hi), 0 0 70px var(--clr-purple-lo); }
}

@keyframes pulse-beam {
  0%, 100% { opacity: 0.9; }
  50%       { opacity: 0.5; }
}

/* Brand text */
.brand { display: flex; flex-direction: column; gap: 4px; }

h1 {
  font-size: clamp(2.4rem, 7vw, 4rem);
  font-weight: 900;
  letter-spacing: 8px;
  text-transform: uppercase;
  background: linear-gradient(135deg, #fff 30%, #c084fc 70%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

h2 {
  font-size: clamp(0.8rem, 2.5vw, 1rem);
  font-weight: 300;
  letter-spacing: 10px;
  color: var(--clr-purple-hi);
  text-transform: uppercase;
}

.subtitle {
  font-size: 0.78rem;
  color: var(--clr-text-2);
  letter-spacing: 1px;
  margin-top: 4px;
}

/* ── Main ───────────────────────────────────────────────────── */
.app-main {
  width: min(960px, 94%);
  margin: 0 auto;
  padding-bottom: calc(var(--bottom-player-h) + 48px);
}

/* ── Landing Section ────────────────────────────────────────── */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 16px 0 48px;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--clr-purple-mid), var(--clr-purple-lo));
  border: 1px solid var(--clr-purple-hi);
  color: #fff;
  padding: 16px 36px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-glow-sm);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary .btn-icon {
  font-size: 1.1rem;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-2);
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.btn-ghost:hover {
  border-color: var(--clr-purple-mid);
  color: var(--clr-purple-hi);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.75rem;
}

.btn-stop {
  background: transparent;
  border: 1px solid var(--clr-stop);
  color: var(--clr-stop);
  padding: 7px 18px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-stop:hover {
  background: #ef444418;
  box-shadow: 0 0 12px #ef444440;
}

/* ── Status text ────────────────────────────────────────────── */
.status {
  color: var(--clr-text-3);
  font-size: 0.82rem;
  letter-spacing: 0.3px;
}

/* ── Browser Section ────────────────────────────────────────── */
.browser {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Toolbar */
.browser-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: #050509e0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 12px 0;
  border-bottom: 1px solid var(--clr-border);
}

/* Search */
.search-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-input);
  color: var(--clr-text);
  font-size: 0.9rem;
  padding: 10px 40px 10px 38px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input::placeholder {
  color: var(--clr-text-3);
}

.search-input:focus {
  border-color: var(--clr-purple-mid);
  box-shadow: var(--shadow-glow-sm);
}

/* Clear X button inside search */
.search-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--clr-text-3);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 2px 4px;
  transition: color var(--transition-fast);
}

.search-clear:hover {
  color: var(--clr-text);
}

/* Meta row */
.browser-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.meta-count {
  color: var(--clr-text-3);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ── Sample Grid ────────────────────────────────────────────── */
.sample-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

/* ── Sample Card ────────────────────────────────────────────── */
/*
  Each card represents a Sample object — not a file.
  States: default | loading | playing
  Future states: favorite | loaded-to-track
*/
.sample-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition:
    border-color var(--transition-med),
    box-shadow var(--transition-med),
    transform var(--transition-fast);
  cursor: default;
  position: relative;
  overflow: hidden;
}

/* Subtle shimmer line on top edge */
.sample-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-purple-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition-med);
}

.sample-card:hover {
  border-color: var(--clr-border-glow);
  box-shadow: 0 4px 24px #8b5cf612, 0 0 0 1px #3b2d6e40;
  transform: translateY(-1px);
}

.sample-card:hover::before {
  opacity: 1;
}

/* Playing state — purple glow ring */
.sample-card.is-playing {
  border-color: var(--clr-purple-hi);
  box-shadow:
    0 0 0 1px var(--clr-purple-mid),
    var(--shadow-glow-md);
}

.sample-card.is-playing::before {
  opacity: 1;
  background: linear-gradient(90deg, transparent, var(--clr-purple-hi), transparent);
}

/* Loading state */
.sample-card.is-loading {
  border-color: var(--clr-purple-lo);
}

/* Card top row: icon + name */
.card-top {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.card-icon {
  font-size: 1.3rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
  filter: drop-shadow(0 0 6px #a855f760);
}

.card-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text);
  /* Truncate long names with ellipsis */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  flex: 1;
  min-width: 0;
}

/* Optional category tag */
.card-category {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--clr-purple-hi);
  background: var(--clr-purple-dim);
  border-radius: 6px;
  padding: 2px 7px;
  white-space: nowrap;
  align-self: flex-start;
  flex-shrink: 0;
}

/* Duration badge */
.card-duration {
  font-size: 0.7rem;
  color: var(--clr-text-3);
  font-variant-numeric: tabular-nums;
  font-family: "SF Mono", "Fira Mono", "Consolas", monospace;
  margin-top: -4px;
}

/*
  FUTURE: mini waveform placeholder
  .card-waveform { height: 28px; background: ...; }
*/

/* Card action buttons */
.card-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 2px;
}

.btn-preview {
  flex: 1;
  background: linear-gradient(135deg, var(--clr-purple-mid), var(--clr-purple-lo));
  border: none;
  color: #fff;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition:
    opacity var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  white-space: nowrap;
  text-align: center;
}

.btn-preview:hover {
  box-shadow: var(--shadow-glow-sm);
  transform: translateY(-1px);
}

.btn-preview:active {
  transform: translateY(0);
}

/* When this card is playing, flip the button to a "pause" style */
.sample-card.is-playing .btn-preview {
  background: linear-gradient(135deg, #a855f7, #7c3aed);
  box-shadow: var(--shadow-glow-sm);
}

/* Loading spinner on the button */
.sample-card.is-loading .btn-preview {
  opacity: 0.65;
  cursor: wait;
}

/*
  FUTURE: Load-to-Track button placeholder
  .btn-load { ... }
*/

/* ── Empty State ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.empty-icon {
  font-size: 3rem;
  opacity: 0.4;
}

.empty-title {
  color: var(--clr-text-2);
  font-size: 0.95rem;
  font-weight: 600;
}

.empty-sub {
  color: var(--clr-text-3);
  font-size: 0.82rem;
}

/* ── Bottom Player ──────────────────────────────────────────── */
/*
  Floats above content. Hidden until playback starts.
  Glassmorphism panel.
*/
.bottom-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #0e0e16cc;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--clr-border-glow);
  box-shadow: 0 -4px 32px #8b5cf620, 0 -1px 0 var(--clr-purple-dim);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  min-height: var(--bottom-player-h);

  /* Slide-in animation */
  transform: translateY(100%);
  transition: transform var(--transition-med);
}

.bottom-player.is-visible {
  transform: translateY(0);
}

/* Sample info */
.player-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 120px;
  flex-shrink: 0;
}

.player-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--clr-purple-hi);
  text-transform: uppercase;
}

.player-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

/* Progress bar */
.player-progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.player-time {
  font-size: 0.72rem;
  font-family: "SF Mono", "Fira Mono", "Consolas", monospace;
  color: var(--clr-text-3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.player-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--clr-border);
  border-radius: 2px;
  overflow: hidden;
  min-width: 60px;
}

.player-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--clr-purple-mid), var(--clr-purple-hi));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--clr-purple-mid);
  transition: width 80ms linear;
}

/* Controls */
.player-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ── Footer ─────────────────────────────────────────────────── */
.app-footer {
  text-align: center;
  padding: 16px 24px 32px;
  color: var(--clr-text-3);
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.footer-dot {
  color: var(--clr-border-glow);
}

/* ── Utility ────────────────────────────────────────────────── */
[hidden] { display: none !important; }

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

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 600px) {

  .app-header {
    padding: 32px 16px 20px;
  }

  .logo {
    width: 100px;
    height: 100px;
  }

  .beam {
    width: 140px;
    left: -20px;
  }

  .browser-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .browser-meta {
    justify-content: space-between;
  }

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

  .bottom-player {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    min-height: unset;
  }

  .player-progress-wrap {
    width: 100%;
  }

  .player-name {
    max-width: unset;
  }
}