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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

/* ===== Theme Variables ===== */

/* Dark Theme */
[data-theme="dark"] {
  --bg: #121212;
  --card-bg: #1E1E1E;
  --text-main: #FFFFFF;
  --text-sub: #9E9E9E;
  --accent: #4FC3F7;
  --btn-bg: #263238;
  --btn-bg-hover: #37474F;
  --border-color: #333333;
  --danger: #EF5350;
  --toggle-bg: #555;
  --toggle-active: #4FC3F7;
  --input-bg: #2A2A2A;
  --shadow: rgba(0, 0, 0, 0.4);
  --modal-bg: rgba(0, 0, 0, 0.8);
}

/* Light Theme */
[data-theme="light"] {
  --bg: #F5F5F5;
  --card-bg: #FFFFFF;
  --text-main: #212121;
  --text-sub: #757575;
  --accent: #1565C0;
  --btn-bg: #E3F2FD;
  --btn-bg-hover: #BBDEFB;
  --border-color: #E0E0E0;
  --danger: #EF5350;
  --toggle-bg: #BDBDBD;
  --toggle-active: #1565C0;
  --input-bg: #FAFAFA;
  --shadow: rgba(0, 0, 0, 0.1);
  --modal-bg: rgba(0, 0, 0, 0.5);
}

/* Workshop (Colorful) Theme */
[data-theme="workshop"] {
  --bg: #FFFDE7;
  --card-bg: #FFFFFF;
  --text-main: #212121;
  --text-sub: #616161;
  --accent: #E91E63;
  --btn-bg: #FCE4EC;
  --btn-bg-hover: #F8BBD0;
  --border-color: #F0E68C;
  --danger: #EF5350;
  --toggle-bg: #BDBDBD;
  --toggle-active: #E91E63;
  --input-bg: #FFFEF5;
  --shadow: rgba(0, 0, 0, 0.1);
  --modal-bg: rgba(0, 0, 0, 0.5);
}

body {
  background: var(--bg);
  color: var(--text-main);
  transition: background 0.3s, color 0.3s;
}

/* ===== Screen Management ===== */
.screen {
  display: none;
  height: 100vh;
  height: 100dvh;
  flex-direction: column;
}

.screen.active {
  display: flex;
}

.hidden {
  display: none !important;
}

/* ===== TOP Screen ===== */
#top-screen {
  padding: 16px;
  position: relative;
  overflow: hidden;
}

#current-timer-area {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 0 6px;
}

#timer-label {
  font-size: max(3vw, 12px);
  color: var(--text-sub);
  margin-bottom: 2px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

#timer-label .label-sep {
  color: var(--border-color);
  font-size: 0.85em;
}

#timer-display {
  font-size: min(26vw, 140px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
  line-height: 1;
  transition: color 0.3s;
}

#timer-display.warning-30 {
  color: #FFA726;
}

#timer-display.warning-10 {
  color: #EF5350;
  animation: pulse 1s ease-in-out infinite;
}

#timer-display.warning-5 {
  color: #D32F2F;
  animation: pulse 0.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

#timer-progress-bar {
  width: 80%;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin-top: 12px;
  overflow: hidden;
}

#timer-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.2s linear;
  width: 100%;
}

/* ===== Controls ===== */
#controls {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 16px 0;
}

.control-btn {
  width: 60px;
  height: 60px;
  border: none;
  border-radius: 50%;
  background: var(--btn-bg);
  color: var(--accent);
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.1s, opacity 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.control-btn:active {
  transform: scale(0.92);
}

.control-btn:hover {
  background: var(--btn-bg-hover);
}

.control-btn:disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* ===== Waiting List ===== */
#waiting-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  -webkit-overflow-scrolling: touch;
}

#waiting-list-header {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 6px;
  padding-left: 4px;
}

.waiting-item {
  padding: 10px 16px;
  margin-bottom: 4px;
  background: var(--card-bg);
  border-radius: 8px;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 8px;
}

.waiting-item .waiting-index {
  font-size: 12px;
  color: var(--text-sub);
  opacity: 0.6;
  min-width: 20px;
}

.waiting-item.is-current {
  color: var(--accent);
  font-weight: 600;
  border-left: 3px solid var(--accent);
}

.waiting-item.is-done {
  opacity: 0.35;
  text-decoration: line-through;
}

/* ===== Empty State ===== */
#empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  gap: 8px;
  font-size: 15px;
}

/* ===== Settings FAB ===== */
#fab-settings {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 4px 12px var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
  z-index: 100;
}

#fab-settings:active {
  transform: scale(0.92);
}

/* Help FAB */
#fab-help {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--btn-bg);
  color: var(--text-sub);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform 0.2s;
  z-index: 100;
}

#fab-help:active {
  transform: scale(0.92);
}

/* ===== Settings Screen ===== */
#settings-screen {
  overflow: hidden;
}

#settings-header {
  flex: 0 0 auto;
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#settings-header h1 {
  font-size: 20px;
  font-weight: 600;
}

.help-link {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  border-radius: 6px;
}

.help-link:active {
  opacity: 0.7;
}

#settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  padding-bottom: 80px;
  -webkit-overflow-scrolling: touch;
}

#settings-footer {
  flex: 0 0 auto;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg);
}

.save-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.save-btn:active {
  opacity: 0.8;
}

/* ===== Timer Card ===== */
.timer-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.timer-card.dragging {
  box-shadow: 0 8px 24px var(--shadow);
  transform: scale(1.02);
  opacity: 0.9;
}

[data-theme="workshop"] .timer-card {
  border-left: 3px solid var(--card-accent, #FF7043);
}

.timer-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.timer-card.expanded .timer-card-header {
  margin-bottom: 10px;
}

.timer-card.expanded .timer-card-header-time {
  display: none;
}

.timer-card-header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.timer-card-header-time {
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.collapse-indicator {
  font-size: 12px;
  color: var(--text-sub);
  transition: transform 0.2s;
}

.timer-card.expanded .collapse-indicator {
  transform: rotate(180deg);
}

.timer-card-body {
  display: none;
}

.timer-card.expanded .timer-card-body {
  display: block;
}

.drag-handle {
  cursor: grab;
  font-size: 18px;
  color: var(--text-sub);
  padding: 4px;
  touch-action: none;
}

.drag-handle:active {
  cursor: grabbing;
}

.timer-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.timer-card-time {
  font-size: 28px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  text-align: center;
  margin: 4px 0;
}

/* Preset Buttons */
.preset-row {
  display: flex;
  gap: 6px;
  margin: 8px 0;
  flex-wrap: wrap;
}

.preset-btn {
  flex: 1;
  min-width: 0;
  padding: 8px 4px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--text-main);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.preset-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

.preset-btn:active {
  transform: scale(0.95);
}

/* Adjust Row */
.adjust-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 8px 0;
}

.adjust-btn {
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--text-main);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.adjust-btn:active {
  background: var(--btn-bg-hover);
}

.adjust-display {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  min-width: 70px;
  text-align: center;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background 0.2s;
}

.adjust-display:active {
  background: var(--btn-bg);
}

/* Direct Input */
.direct-input {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  background: var(--input-bg);
  border: 2px solid var(--accent);
  border-radius: 8px;
  text-align: center;
  width: 90px;
  padding: 4px 8px;
  outline: none;
}

/* Timer Card Settings */
.timer-card-settings {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 8px 0;
}

.setting-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.setting-inline label {
  color: var(--text-sub);
  min-width: 24px;
}

.volume-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.volume-slider:disabled {
  opacity: 0.3;
}

/* Timer Card Actions */
.timer-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.card-action-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--text-main);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.card-action-btn:active {
  background: var(--btn-bg-hover);
}

.card-action-btn.delete-btn {
  color: var(--danger);
  border-color: var(--danger);
}

/* ===== Add Timer Button ===== */
.add-timer-btn {
  width: 100%;
  padding: 14px;
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  background: transparent;
  color: var(--text-sub);
  font-size: 15px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.add-timer-btn:active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Global Settings ===== */
#global-settings {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

#global-settings h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 15px;
}

.setting-row:last-child {
  border-bottom: none;
  justify-content: center;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--toggle-bg);
  border-radius: 28px;
  transition: background 0.3s;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  bottom: 3px;
  background: #FFFFFF;
  border-radius: 50%;
  transition: transform 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--toggle-active);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* Small toggle for cards */
.toggle-switch.small {
  width: 40px;
  height: 24px;
}

.toggle-switch.small .toggle-slider::before {
  width: 18px;
  height: 18px;
}

.toggle-switch.small input:checked + .toggle-slider::before {
  transform: translateX(16px);
}

/* ===== Theme Selector ===== */
#theme-selector,
#waiting-mode-selector {
  display: flex;
  gap: 4px;
}

.theme-btn {
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--btn-bg);
  color: var(--text-main);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.theme-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

/* ===== Global Sound/Flash Settings ===== */
.global-effect-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 15px;
}

.global-effect-row label {
  min-width: 24px;
  color: var(--text-sub);
}

.global-effect-row .toggle-switch {
  flex-shrink: 0;
}

.global-effect-row .volume-slider {
  flex: 1;
  max-width: 140px;
}

.global-effect-row .effect-label {
  flex: 1;
}

/* ===== Danger Button ===== */
.danger-btn {
  padding: 10px 24px;
  border: 1px solid var(--danger);
  border-radius: 8px;
  background: transparent;
  color: var(--danger);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
}

.danger-btn:active {
  background: rgba(239, 83, 80, 0.1);
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: var(--modal-bg);
}

.modal-content {
  position: relative;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 8px 32px var(--shadow);
  max-width: 280px;
  width: 80%;
}

.modal-content p {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
}

.modal-btn {
  padding: 12px 32px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

.modal-btn:active {
  opacity: 0.8;
}

/* ===== Flash Overlay ===== */
#flash-overlay {
  position: fixed;
  inset: 0;
  background: #FFFFFF;
  z-index: 2000;
  pointer-events: none;
  opacity: 0;
}

#flash-overlay.flash-active {
  animation: flash-anim 0.6s ease-out;
}

@keyframes flash-anim {
  0% { opacity: 0; }
  10% { opacity: 0.9; }
  20% { opacity: 0; }
  30% { opacity: 0.9; }
  40% { opacity: 0; }
  50% { opacity: 0.9; }
  60% { opacity: 0; }
  100% { opacity: 0; }
}

/* ===== Workshop theme card accents ===== */
[data-theme="workshop"] .timer-card:nth-child(4n+1) { --card-accent: #FF7043; }
[data-theme="workshop"] .timer-card:nth-child(4n+2) { --card-accent: #29B6F6; }
[data-theme="workshop"] .timer-card:nth-child(4n+3) { --card-accent: #66BB6A; }
[data-theme="workshop"] .timer-card:nth-child(4n+4) { --card-accent: #AB47BC; }

/* ===== Drag placeholder ===== */
.drag-placeholder {
  border: 2px dashed var(--accent);
  border-radius: 12px;
  margin-bottom: 12px;
  background: transparent;
  opacity: 0.4;
}