/* ========== Root Variables ========== */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #161625;
  --bg-card: rgba(30, 30, 50, 0.7);
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-active: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.08);
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #606078;
  --accent: #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --success: #00cec9;
  --danger: #ff6b6b;
  --warning: #fdcb6e;
  --waveform-color: #a29bfe;
  --waveform-selected: #6c5ce7;
  --playhead: #00cec9;
  --selection-bg: rgba(108, 92, 231, 0.25);
  --selection-border: rgba(108, 92, 231, 0.6);
  --radius: 8px;
  --radius-sm: 4px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.15s ease;
}

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

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* ========== App Layout ========== */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ========== Header ========== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

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

.header-left h1 {
  font-size: 1.15rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--success));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 20px;
  background: var(--accent-glow);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.file-info .separator {
  color: var(--text-muted);
  opacity: 0.4;
}

/* ========== Toolbar ========== */
.toolbar {
  display: flex;
  align-items: center;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 4px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.toolbar-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
  margin: 0 8px;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.tool-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tool-btn:active:not(:disabled) {
  background: var(--bg-active);
}

.tool-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tool-btn.accent {
  color: var(--accent);
}

.tool-btn.accent:hover:not(:disabled) {
  background: var(--accent-glow);
  color: #fff;
}

.tool-btn.marker-start {
  color: #00b894;
}

.tool-btn.marker-start:hover:not(:disabled),
.tool-btn.marker-start.active {
  background: rgba(0, 184, 148, 0.15);
  color: #00b894;
}

.tool-btn.marker-end {
  color: #e17055;
}

.tool-btn.marker-end:hover:not(:disabled),
.tool-btn.marker-end.active {
  background: rgba(225, 112, 85, 0.15);
  color: #e17055;
}

.tool-btn.recording {
  color: var(--danger);
  animation: pulse-record 1.2s ease-in-out infinite;
}

@keyframes pulse-record {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

.tool-btn span {
  display: none;
}

@media (min-width: 800px) {
  .tool-btn span {
    display: inline;
  }
}

/* ========== Main Content ========== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

/* ========== Waveform Panel ========== */
.waveform-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--bg-primary);
  min-height: 0;
}

/* Drop Zone */
.drop-zone {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  transition: all 0.3s;
  cursor: pointer;
}

.drop-zone.hidden {
  display: none;
}

.drop-zone.dragover {
  background: rgba(108, 92, 231, 0.08);
  border: 2px dashed var(--accent);
}

.drop-zone-content {
  text-align: center;
  color: var(--text-secondary);
}

.drop-zone-content i {
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.6;
}

.drop-zone-content p {
  margin: 6px 0;
  font-size: 0.95rem;
}

.drop-zone-content .hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.drop-zone-content .formats {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 12px;
  letter-spacing: 1px;
}

/* Time Ruler */
.time-ruler {
  height: 24px;
  width: 100%;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

/* Waveform Canvas Container */
.waveform-scroll {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  position: relative;
  cursor: crosshair;
  min-height: 0;
}

.waveform-scroll canvas {
  display: block;
}

/* Selection Info / Precise Time Inputs */
.selection-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.time-input-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.time-input-group label {
  color: var(--text-secondary);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.time-input {
  width: 90px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.78rem;
  outline: none;
  transition: border-color var(--transition);
  -moz-appearance: textfield;
  appearance: textfield;
}

.time-input::-webkit-inner-spin-button,
.time-input::-webkit-outer-spin-button {
  opacity: 1;
}

.time-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.selection-info .arrow {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.selection-duration {
  color: var(--accent);
  font-weight: 500;
}

.marker-label {
  font-weight: 600;
}

.start-label {
  color: #00b894;
}

.end-label {
  color: #e17055;
}

.start-input:focus {
  border-color: #00b894;
  box-shadow: 0 0 0 2px rgba(0, 184, 148, 0.25);
}

.end-input:focus {
  border-color: #e17055;
  box-shadow: 0 0 0 2px rgba(225, 112, 85, 0.25);
}

.unit {
  color: var(--text-muted);
  font-size: 0.7rem;
}

/* ========== Effects Panel ========== */
.effects-panel {
  flex-shrink: 0;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.effects-panel h3 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.effects-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.effect-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--transition);
  min-width: 64px;
}

.effect-btn i {
  font-size: 0.9rem;
}

.effect-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.effect-btn:active:not(:disabled) {
  transform: translateY(0);
}

.effect-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.effect-btn.danger:hover:not(:disabled) {
  border-color: var(--danger);
  color: var(--danger);
}

/* Volume Control */
.volume-control {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.volume-control label {
  white-space: nowrap;
  min-width: 70px;
}

.volume-control input[type="range"] {
  flex: 1;
  max-width: 200px;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
}

.volume-control span {
  min-width: 40px;
  text-align: right;
  color: var(--accent);
  font-weight: 500;
}

/* ========== Export Bar ========== */
.export-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.export-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.text-success {
  color: var(--success);
}

.export-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), #8b7cf7);
  color: #fff;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.export-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.export-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ========== Toast Notifications ========== */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: var(--radius);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.82rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  animation: toast-slide-in 0.3s ease-out;
  max-width: 360px;
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.info {
  border-left: 3px solid var(--accent);
}

.toast.removing {
  animation: toast-slide-out 0.25s ease-in forwards;
}

@keyframes toast-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toast-slide-out {
  from {
    transform: translateX(0);
    opacity: 1;
  }

  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ========== Responsive ========== */
@media (max-width: 600px) {
  .app-header {
    padding: 8px 12px;
  }

  .file-info {
    display: none;
  }

  .toolbar {
    padding: 4px 8px;
  }

  .toolbar-divider {
    margin: 0 4px;
  }

  .effects-panel {
    padding: 8px 10px;
  }

  .export-bar {
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
  }

  .export-left {
    font-size: 0.7rem;
  }
}