/* ==========================================================================
   MUZIC.PW - FAST & BAREBONES MATERIAL DESIGN 3 MUSIC PLAYER
   Theme: Dark Grey & Vibrant Pink
   Typography: Google Sans (Fast Local Loading with font-display: swap)
   ========================================================================== */

/* 1. FAST LOCAL FONT LOADING (Google Sans) */
@font-face {
  font-family: 'Google Sans';
  font-style: normal;
  font-weight: 400;
  src: url('./font/GoogleSans-Regular.ttf') format('truetype');
  font-display: swap;
}

@font-face {
  font-family: 'Google Sans';
  font-style: normal;
  font-weight: 500;
  src: url('./font/GoogleSans-Medium.ttf') format('truetype');
  font-display: swap;
}

@font-face {
  font-family: 'Google Sans';
  font-style: normal;
  font-weight: 700;
  src: url('./font/GoogleSans-Bold.ttf') format('truetype');
  font-display: swap;
}

/* 2. MD3 COLOR PALETTE & DESIGN TOKENS */
:root {
  /* Vibrant Pink Primary */
  --md-primary: #FF2A85;
  --md-primary-hover: #FF4B99;
  --md-primary-container: #4D0026;
  --md-on-primary-container: #FFD8E8;
  --md-primary-glow: 0 0 20px rgba(255, 42, 133, 0.4);

  /* Dark Grey Surface Palette */
  --md-bg: #0E0E12;
  --md-surface: #14141A;
  --md-surface-container: #1C1C24;
  --md-surface-container-high: #252530;
  --md-surface-container-highest: #2F2F3D;

  /* Typography Colors */
  --md-on-surface: #ECE8EC;
  --md-on-surface-variant: #A79FA8;
  --md-outline: #47414A;
  --md-outline-variant: #2D2831;

  /* Shape Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Player Height */
  --player-height: 88px;
}

/* 3. RESET & BASE */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Google Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--md-bg);
  color: var(--md-on-surface);
  overflow: hidden;
  user-select: none;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--md-surface-container-highest);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--md-outline);
}

/* 4. APP SHELL LAYOUT */
.app-wrapper {
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.ambient-glow {
  position: absolute;
  top: -10%;
  left: 30%;
  width: 50vw;
  height: 40vh;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 42, 133, 0.15) 0%, rgba(14, 14, 18, 0) 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

/* 5. TOP HEADER */
.app-header {
  height: 64px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--md-surface);
  border-bottom: 1px solid var(--md-outline-variant);
  position: relative;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--md-primary), #A6004E);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(255, 42, 133, 0.3);
}

.brand-dot {
  color: var(--md-primary);
}

.library-badge {
  font-size: 12px;
  font-weight: 600;
  background-color: var(--md-surface-container-high);
  color: var(--md-on-surface-variant);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.md3-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.md3-btn-filled {
  background-color: var(--md-primary);
  color: #FFFFFF;
  box-shadow: var(--md-primary-glow);
}

.md3-btn-filled:hover {
  background-color: var(--md-primary-hover);
  transform: translateY(-1px);
}

.md3-btn-outlined {
  background: transparent;
  border: 1px solid var(--md-outline);
  color: var(--md-on-surface-variant);
}

.md3-btn-outlined:hover {
  border-color: var(--md-primary);
  color: var(--md-primary);
  background-color: rgba(255, 42, 133, 0.08);
}

/* 6. MAIN CONTENT WRAPPER */
.main-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px calc(var(--player-height) + 32px) 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  z-index: 1;
}

/* 7. DROPZONE CARD */
.dropzone-card {
  background-color: var(--md-surface-container);
  border: 2px dashed var(--md-outline);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.dropzone-card:hover, .dropzone-card.drag-over {
  border-color: var(--md-primary);
  background-color: rgba(255, 42, 133, 0.05);
  box-shadow: 0 0 24px rgba(255, 42, 133, 0.15);
}

.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.dropzone-icon-circle {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background-color: var(--md-surface-container-highest);
  color: var(--md-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  transition: transform 0.2s ease;
}

.dropzone-card:hover .dropzone-icon-circle {
  transform: translateY(-3px);
}

.dropzone-title {
  font-size: 16px;
  font-weight: 700;
}

.dropzone-subtitle {
  font-size: 13px;
  color: var(--md-on-surface-variant);
}

/* 8. LIBRARY SECTION & TABLE */
.library-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.4px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  width: 260px;
  color: var(--md-on-surface-variant);
  transition: border-color 0.2s ease;
}

.search-box:focus-within {
  border-color: var(--md-primary);
  color: var(--md-on-surface);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--md-on-surface);
  font-size: 13.5px;
  width: 100%;
}

.table-wrapper {
  background-color: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tracks-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.tracks-table thead th {
  padding: 12px 16px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--md-on-surface-variant);
  border-bottom: 1px solid var(--md-outline-variant);
  background-color: var(--md-surface-container-low, #111116);
}

.col-num { width: 50px; text-align: center; }
.col-title { width: auto; }
.col-duration { width: 120px; }
.col-actions { width: 100px; text-align: right; }

.track-row {
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.track-row:hover {
  background-color: var(--md-surface-container-high);
}

.track-row.active {
  background-color: rgba(255, 42, 133, 0.12);
}

.track-row.active .t-title-text {
  color: var(--md-primary);
  font-weight: 700;
}

.track-row td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 14px;
}

.t-num-cell {
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 13px;
}

.t-title-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.t-mini-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--md-surface-container-highest);
  color: var(--md-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.t-title-text {
  font-weight: 600;
  color: var(--md-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.t-duration-cell {
  color: var(--md-on-surface-variant);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
}

.t-actions-cell {
  text-align: right;
}

.btn-del-track {
  background: transparent;
  border: none;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
  transition: all 0.2s ease;
}

.btn-del-track:hover {
  color: #FF4757;
  opacity: 1;
  background-color: rgba(255, 71, 87, 0.1);
}

/* 9. EMPTY STATE */
.empty-state {
  padding: 48px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.empty-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background-color: var(--md-surface-container);
  color: var(--md-on-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}

.empty-title {
  font-size: 18px;
  font-weight: 700;
}

.empty-desc {
  font-size: 14px;
  color: var(--md-on-surface-variant);
  max-width: 380px;
}

/* 10. BOTTOM PERSISTENT PLAYER */
.bottom-player {
  height: var(--player-height);
  width: 100vw;
  background-color: var(--md-surface);
  border-top: 1px solid var(--md-outline-variant);
  position: fixed;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 100;
}

/* Left: Meta */
.player-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 240px;
  min-width: 180px;
}

.track-disc-art {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--md-surface-container-highest), #121216);
  color: var(--md-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--md-outline-variant);
}

.track-disc-art.playing {
  animation: pulseGlow 2s infinite ease-in-out;
  border-color: var(--md-primary);
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 10px rgba(255, 42, 133, 0.3); }
  50% { box-shadow: 0 0 20px rgba(255, 42, 133, 0.6); }
}

.track-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.track-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--md-on-surface);
}

.track-artist {
  font-size: 12px;
  color: var(--md-on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Center: Controls & Squiggly Wave */
.player-controls-center {
  flex: 1;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
}

.transport-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--md-on-surface-variant);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  color: var(--md-on-surface);
  background-color: rgba(255, 255, 255, 0.06);
}

.icon-btn.active {
  color: var(--md-primary);
}

.play-fab {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--md-primary);
  color: #FFFFFF;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--md-primary-glow);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.play-fab:hover {
  transform: scale(1.08);
  background-color: var(--md-primary-hover);
}

/* 11. SQUIGGLY PROGRESS BAR */
.progress-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.time-stamp {
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
  min-width: 32px;
}

.squiggly-canvas-wrapper {
  flex: 1;
  height: 28px;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
}

#squiggly-canvas {
  width: 100%;
  height: 28px;
  display: block;
}

.time-tooltip {
  position: absolute;
  top: -24px;
  transform: translateX(-50%);
  background-color: var(--md-surface-container-highest);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.squiggly-canvas-wrapper:hover .time-tooltip {
  opacity: 1;
}

/* 12. VOLUME CONTROLS */
.player-volume-right {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 240px;
  justify-content: flex-end;
}

.volume-track {
  width: 88px;
  height: 4px;
  border-radius: var(--radius-full);
  background-color: var(--md-surface-container-highest);
  cursor: pointer;
  position: relative;
}

.volume-fill {
  height: 100%;
  background-color: var(--md-primary);
  border-radius: inherit;
  width: 80%;
}

/* 13. TOAST SNACKBAR */
.toast-snackbar {
  position: fixed;
  bottom: calc(var(--player-height) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background-color: #2D2D38;
  color: #FFFFFF;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.1, 0.9, 0.2, 1);
  z-index: 200;
}

.toast-snackbar.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 14. RESPONSIVE BREAKPOINTS */
@media (max-width: 768px) {
  .app-header {
    padding: 0 16px;
  }
  .main-container {
    padding: 16px 16px calc(var(--player-height) + 24px) 16px;
  }
  .player-meta {
    width: auto;
    max-width: 120px;
  }
  .player-volume-right {
    display: none;
  }
  .col-duration {
    display: none;
  }
}