/* ============================================
   FLOWSTATE - Brutalist "Receipt" Design
   Match Reference: Card Stack, Monospaced, High Contrast
   ============================================ */

:root {
  --font-mono: "JetBrains Mono", monospace;

  /* Palette */
  --bg-backdrop: #b8b3a9;
  --bg-card: #ffffff;
  --bg-tab-inactive: #dcd8d0;
  --bg-black: #000000;

  --text-primary: #000000;
  --text-secondary: #555555;

  --spacing-unit: 8px;
  --card-gap: 8px;
}

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

body {
  font-family: var(--font-mono);
  background-color: var(--bg-backdrop);
  color: var(--text-primary);
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* New Wobble Background Layer */
.bg-wobble {
  position: fixed;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  z-index: -2;
  background-image: url("https://images.unsplash.com/photo-1618005182384-a83a8bd57fbe?q=80&w=2564&auto=format&fit=crop");
  background-size: cover;
  background-position: center;
  animation: bg-float 30s infinite ease-in-out alternate;
  pointer-events: none;
}

@keyframes bg-float {
  0% {
    transform: scale(1) translate(0, 0) rotate(0deg);
  }
  25% {
    transform: scale(1.02) translate(1%, 1%) rotate(0.5deg);
  }
  50% {
    transform: scale(1.05) translate(-1%, 2%) rotate(-0.5deg);
  }
  75% {
    transform: scale(1.02) translate(-2%, -1%) rotate(0.5deg);
  }
  100% {
    transform: scale(1.1) translate(1%, -2%) rotate(0deg);
  }
}

.backdrop {
  position: absolute;
  inset: 0;
  backdrop-filter: blur(40px); /* Heavy blur */
  background: rgba(180, 175, 165, 0.6);
  z-index: -1;
}

.interface-container {
  width: 500px;
  max-width: 95vw;
  display: flex;
  flex-direction: column;
  gap: var(--card-gap);
  z-index: 10;
}

/* --- TABS HEADER --- */
.tabs-nav {
  display: flex;
  width: 100%;
  background: var(--bg-tab-inactive);
  padding-right: 40px;
  position: relative;
  user-select: none;
}

.close-btn {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 48px;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  font-weight: 500;
}

.tab-item {
  padding: 16px 20px;
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
}

.tab-item.active {
  background: var(--bg-card);
  color: var(--text-primary);
  opacity: 1;
}

/* --- VIEW ANIMATIONS --- */
.view-section {
  display: none;
  width: 100%;
}

.view-section.active {
  display: block;
  animation: slide-up-fade 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slide-up-fade {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- CARDS COMMON --- */
.panel {
  background: var(--bg-card);
  padding: 24px;
  width: 100%;
}

/* --- SUMMARY CARD (Top) --- */
.summary-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 140px;
  margin-top: -8px;
}

.panel-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}
.panel-row.top {
  margin-bottom: 24px;
}

.label {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  font-weight: 700;
  text-transform: uppercase;
}

.data-col {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.data-row {
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-transform: uppercase;
  line-height: 1.2;
}

.data-row span:first-child {
  font-weight: 700;
  font-size: 0.9rem;
}

.data-row span:last-child {
  color: #666;
  font-size: 0.65rem;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: #000;
  border-radius: 50%;
  margin-left: 6px;
}
.status-dot.ready {
  background: #00ff00;
}

/* Visualization inside summary */
.visualization-area {
  width: 100%;
  height: 48px;
  background: #000;
  position: relative;
}
.spectrogram-canvas {
  width: 100%;
  height: 100%;
}
.viz-overlay {
  position: absolute;
  bottom: 2px;
  left: 4px;
  color: #fff;
  font-size: 0.6rem;
}

/* --- TRACK CARDS (Middle items) --- */
.track-panel {
  display: grid;
  /* Img | Middle (Index/Stepper) | Right (Desc) */
  grid-template-columns: 64px 140px 1fr;
  gap: 20px;
  padding: 24px;
  position: relative;
  align-items: flex-start;
  margin-top: 8px; /* Adds gap between cards */
}

.track-visual-box {
  width: 64px;
  height: 64px;
  background: #f0f0f0;
  position: relative;
}
.waveform-canvas {
  width: 100%;
  height: 100%;
  background: #f0f0f0;
}

.track-middle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 64px;
}

.track-meta-row {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stepper-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 700;
  width: 100%;
}

.step-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  padding: 0 4px;
}

.step-val {
  flex-grow: 1;
  text-align: center;
}

.track-info-col {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  height: 100%;
  font-size: 0.75rem;
  line-height: 1.4;
  text-transform: uppercase;
}

.track-filename {
  font-weight: 700;
  margin-bottom: 4px;
  display: block;
  max-width: 100%;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  cursor: pointer;
}
.track-filename:hover {
  text-decoration: underline;
}

.track-type-tag {
  color: #666;
  margin-top: auto;
}

.side-toggle {
  position: absolute;
  right: -24px;
  top: 24px;
  width: 24px;
  height: 48px;
  background: #fff;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  border-radius: 0 4px 4px 0;
}

/* --- FOOTER BUTTON --- */
.main-action-btn {
  width: 100%;
  background: var(--bg-black);
  color: #fff;
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  margin-top: 8px;
  transition: background 0.2s;
}
.main-action-btn:hover:not(:disabled) {
  background: #333;
}
.main-action-btn:disabled {
  background: #555;
  cursor: not-allowed;
}

/* Secondary Actions */
.secondary-actions {
  display: flex;
  background: #000;
  border-top: 1px solid #333;
}
.sub-btn {
  flex: 1;
  background: #000;
  color: #fff;
  border: none;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  cursor: pointer;
  border-right: 1px solid #333;
}
.sub-btn:last-child {
  border-right: none;
}
.sub-btn:hover {
  background: #111;
}
.playing .sub-btn#playBtn {
  color: #00f0ff;
}

/* --- COMPARISON VIEW --- */
.comparison-row {
  margin-bottom: 24px;
}

.comp-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  background: #f4f4f4;
  padding: 8px 12px;
  border-left: 2px solid #000;
}

.comp-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.comp-title.highlight {
  color: #ff2c7b;
}

.mini-play-btn {
  width: 24px;
  height: 24px;
  border: 1px solid #000;
  background: #fff;
  font-size: 0.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.mini-play-btn:hover:not(:disabled) {
  background: #000;
  color: #fff;
}
.mini-play-btn.playing {
  background: #00f0ff;
  border-color: #00f0ff;
  color: #000;
}

.comp-viz {
  width: 100%;
  height: 80px;
  background: #000;
  border: 1px solid #eee;
}

.comparison-canvas {
  width: 100%;
  height: 100%;
}

/* --- TRACK PREVIEW PLAY BUTTONS --- */
.play-overlay {
  position: absolute;
  inset: 0;
  /* Keep waveform visible; no full-screen dark tint. */
  background: rgba(0, 0, 0, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  cursor: pointer;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
}

.track-visual-box:hover .play-overlay {
  opacity: 1;
}

.play-overlay:hover {
  background: rgba(0, 0, 0, 0);
  color: #00f0ff;
}

.play-overlay.playing {
  opacity: 1;
  background: rgba(0, 0, 0, 0);
  color: #00f0ff;
  text-shadow: 0 0 10px #00f0ff;
}

/* --- AUTHOR LINK --- */
.author-link {
  color: #000;
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid #000;
  transition: background 0.2s, color 0.2s;
}
.author-link:hover {
  background: #000;
  color: #fff;
  text-decoration: none;
}

/* ============================================
   MOBILE RESPONSIVENESS
   ============================================ */
@media (max-width: 600px) {
  body {
    align-items: flex-start;
    overflow-y: auto; /* Enable vertical scroll */
    height: auto;
    min-height: 100vh;
    padding: 0;
  }

  .bg-wobble {
    display: none; /* Performance optimization for mobile */
  }

  .interface-container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    gap: 1px; /* Minimal gap */
    background: #e0e0e0; /* Separator color */
  }

  /* Make panels flush */
  .panel {
    padding: 16px;
    margin: 0;
    width: 100%;
  }

  /* Scrollable Tabs */
  .tabs-nav {
    overflow-x: auto;
    overflow-y: hidden;
    justify-content: flex-start;
    padding-right: 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
  }
  .tabs-nav::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
  }

  .tab-item {
    padding: 14px 16px;
    flex-shrink: 0;
    font-size: 0.75rem;
  }

  .close-btn {
    display: none;
  }

  /* Summary Panel Adjustments */
  .summary-panel {
    min-height: auto;
  }

  .panel-row {
    margin-bottom: 16px;
  }

  .panel-row.top {
    margin-bottom: 16px;
  }

  /* Track Cards Compact Layout */
  .track-panel {
    /* Grid: Image | Content */
    display: grid;
    grid-template-columns: 60px 1fr;
    grid-template-rows: auto auto; /* Meta Row | Filename */
    gap: 12px;
    padding: 16px;
    align-items: center;
    margin-top: 0;
  }

  .track-visual-box {
    width: 60px;
    height: 60px;
    grid-row: 1 / span 2;
  }

  .track-middle {
    grid-column: 2;
    grid-row: 1;
    height: auto;
    flex-direction: row;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
  }

  /* Hide the original label "01 / SOURCE" etc to save space if needed, 
       or keep it but adjust layout */
  .track-meta-row {
    font-size: 0.7rem;
    margin-bottom: 0;
  }

  .track-controls-col {
    /* Move stepper to the right */
    margin-left: auto;
  }

  .stepper-control {
    width: auto;
    gap: 8px;
  }

  .step-btn {
    padding: 8px; /* Larger touch target */
    background: #f4f4f4;
    border-radius: 4px;
  }

  .track-info-col {
    grid-column: 2;
    grid-row: 2;
    height: auto;
  }

  .track-filename {
    font-size: 0.85rem;
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }

  .track-type-tag {
    font-size: 0.65rem;
    margin-top: 4px;
  }

  .side-toggle {
    display: none; /* Hide toggle on mobile */
  }

  /* Buttons */
  .main-action-btn {
    padding: 20px;
    font-size: 0.9rem;
    position: sticky;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
  }

  .secondary-actions {
    margin-bottom: 20px; /* Space for sticky button/scroll */
  }

  .sub-btn {
    padding: 14px;
  }

  /* Comparison View */
  .comp-viz {
    height: 60px;
  }
}