:root {
  --md-sys-color-primary: #a8c7fa;
  --md-sys-color-on-primary: #062e6f;
  --md-sys-color-primary-container: #004a77;
  --md-sys-color-on-primary-container: #c2e7ff;
  --md-sys-color-surface: #111318;
  --md-sys-color-surface-container: #1e2025;
  --md-sys-color-surface-container-high: #282a2f;
  --md-sys-color-on-surface: #e2e2e9;
  --md-sys-color-on-surface-variant: #c4c6d0;
  --md-sys-color-outline: #8e9099;
  --md-sys-color-outline-variant: #44474f;
  --md-sys-color-error: #f2b8b5;
  --md-sys-color-on-error: #601410;
  
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-full: 9999px;
}

body {
  font-family: 'Google Sans', 'Roboto', sans-serif;
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 24px;
}

.app-container {
  width: 100%;
  max-width: 960px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 8px;
  flex-wrap: wrap;
  gap: 12px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.shot-badge {
  font-size: 0.9rem;
  color: var(--md-sys-color-outline);
  margin-left: 8px;
}

.btn-action {
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 6px 12px;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.btn-action:hover:not(:disabled) {
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
  border-color: var(--md-sys-color-primary);
}

.btn-action.btn-danger:hover:not(:disabled) {
  color: var(--md-sys-color-error);
  border-color: var(--md-sys-color-error);
}

.btn-action:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.btn-action .material-symbols-outlined {
  font-size: 18px;
}

/* Media Area */
.media-card {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-extra-large);
  border: 1px solid var(--md-sys-color-outline-variant);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 9;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  border: 2px dashed var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-extra-large);
  margin: 12px;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  z-index: 2;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--md-sys-color-primary);
  background: rgba(168, 199, 250, 0.08);
}

.drop-zone .material-symbols-outlined {
  font-size: 64px;
  color: var(--md-sys-color-primary);
}

.drop-zone p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1rem;
  margin: 0;
}

video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
  background-color: #000;
}

/* Controls Panel */
.controls-card {
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  backdrop-filter: blur(20px);
}

/* Timeline */
.timeline-container {
  display: flex;
  align-items: center;
  gap: 16px;
}

.time-display {
  font-family: 'Roboto Mono', monospace;
  font-size: 1.1rem;
  color: var(--md-sys-color-primary);
  min-width: 140px;
  text-align: center;
  background: rgba(0, 0, 0, 0.3);
  padding: 6px 12px;
  border-radius: 8px;
}

input[type="range"] {
  flex: 1;
  appearance: none;
  background: var(--md-sys-color-outline-variant);
  height: 6px;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  cursor: pointer;
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

/* Controls Rows */
.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.select-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.inline-label {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mt-8 {
  margin-top: 8px;
}

.btn-group {
  display: flex;
  gap: 6px;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

/* Material 3 Buttons */
.btn {
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 6px 12px;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.btn:hover:not(:disabled) {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: transparent;
}

.btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.btn kbd {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.7rem;
  font-family: 'Roboto Mono', monospace;
  color: var(--md-sys-color-primary);
}

.btn-primary {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  padding: 10px 20px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(168, 199, 250, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background: #c2e7ff;
  color: #001d35;
  box-shadow: 0 6px 16px rgba(168, 199, 250, 0.4);
}

.btn-block {
  justify-content: center;
  width: 100%;
}

.btn-icon {
  padding: 10px;
  border-radius: 50%;
}

/* Controls */
.select-control {
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 6px 12px;
  border-radius: var(--md-sys-shape-corner-medium);
  font-size: 0.85rem;
  outline: none;
}

/* Shortcuts Guide */
.shortcuts-guide {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(85px, 1fr));
  gap: 8px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  list-style: none;
  margin-top: 4px;
}

.shortcuts-guide li {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}

.shortcuts-guide kbd {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.7rem;
  font-family: 'Roboto Mono', monospace;
  color: var(--md-sys-color-primary);
}

/* SRT Accordions & Form Section */
.subtitle-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details.card-accordion {
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  overflow: hidden;
}

details.card-accordion summary {
  padding: 14px 20px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  background: rgba(255, 255, 255, 0.03);
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

details.card-accordion summary:hover {
  background: rgba(255, 255, 255, 0.06);
}

.accordion-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.form-row > div {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-with-btn {
  display: flex;
  gap: 6px;
}

label {
  font-size: 0.8rem;
  color: var(--md-sys-color-on-surface-variant);
}

input[type="text"], textarea {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
  padding: 8px 12px;
  border-radius: var(--md-sys-shape-corner-medium);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
}

input[type="text"]:focus, textarea:focus {
  border-color: var(--md-sys-color-primary);
}

textarea.sub-text {
  width: 100%;
  min-height: 60px;
  resize: vertical;
}

/* Subtitle List */
.subtitle-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
}

.subtitle-item {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.time-adjust-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.time-adjust-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.time-clickable {
  cursor: pointer;
  font-family: 'Roboto Mono', monospace;
  font-size: 0.85rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 4px 8px;
  border-radius: 4px;
  color: var(--md-sys-color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.time-clickable:hover {
  text-decoration: underline;
}

.btn-sm {
  padding: 2px 6px;
  font-size: 0.75rem;
  border-radius: 4px;
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
}

.btn-sm:hover {
  background: var(--md-sys-color-primary-container);
}

.btn-sm.btn-danger {
  color: var(--md-sys-color-error);
}

.btn-sm.btn-danger:hover {
  background: rgba(242, 184, 181, 0.2);
}

#file-input, #srt-file-input {
  display: none;
}

/* Accessibility Helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Controls Panel Accordion */
details.controls-accordion {
  margin-top: 8px;
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  overflow: hidden;
}

details.controls-accordion summary {
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.2s ease;
}

details.controls-accordion summary:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--md-sys-color-on-surface);
}

details.controls-accordion[open] summary .material-symbols-outlined {
  transform: rotate(180deg);
}

.accordion-inner {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}