:root {
  --accent: #ff6b6b;
  --accent-break: #4ecdc4;
  --text: #f5f5f7;
  --text-dim: rgba(245, 245, 247, 0.7);
  --glass-bg: rgba(20, 20, 25, 0.45);
  --glass-border: rgba(255, 255, 255, 0.14);
  --track: rgba(255, 255, 255, 0.18);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

button, input {
  font-family: inherit;
}

/* ---------------------------------------------------------------------- */
/* Background layers                                                      */
/* ---------------------------------------------------------------------- */

#bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: #0f2027;
}

.bg-layer-el {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.bg-layer-el.active {
  opacity: 1;
}

#bg-image-layer {
  background-size: cover;
  background-position: center;
}

#bg-yt-layer {
  overflow: hidden;
}

#yt-player {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

#bg-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: rgba(8, 8, 12, 0.4);
}

/* ---------------------------------------------------------------------- */
/* Layout                                                                  */
/* ---------------------------------------------------------------------- */

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}

.panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 20px;
}

/* ---------------------------------------------------------------------- */
/* Timer card                                                              */
/* ---------------------------------------------------------------------- */

.timer-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.mode-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
}

.ring-wrap {
  position: relative;
  width: 260px;
  height: 260px;
}

.ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: var(--track);
  stroke-width: 12;
}

.ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.25s linear, stroke 0.4s ease;
}

body.mode-break .ring-progress {
  stroke: var(--accent-break);
}

.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

#time-display {
  font-size: 3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.session-count {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.linear-bar {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: var(--track);
  overflow: hidden;
}

.linear-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.25s linear, background 0.4s ease;
}

body.mode-break .linear-bar-fill {
  background: var(--accent-break);
}

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

.primary-btn {
  min-width: 120px;
  padding: 14px 28px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #1a1a1a;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.4s ease;
}

.primary-btn:hover {
  transform: scale(1.04);
}

body.mode-break .primary-btn {
  background: var(--accent-break);
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, transform 0.15s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: scale(1.05);
}

.icon-btn-lg {
  width: 56px;
  height: 56px;
  font-size: 1.4rem;
}

/* ---------------------------------------------------------------------- */
/* Spotify panel                                                          */
/* ---------------------------------------------------------------------- */

.spotify-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spotify-mode-tabs {
  margin-bottom: 2px;
}

.sp-mode-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spotify-embed-wrap iframe {
  border-radius: 12px;
  display: block;
}

.spotify-state p {
  margin: 0 0 12px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.now-playing {
  display: flex;
  align-items: center;
  gap: 12px;
}

.track-art {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  object-fit: cover;
  flex-shrink: 0;
}

.track-meta {
  min-width: 0;
}

.track-name {
  margin: 0;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-artist {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.spotify-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.spotify-controls input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.sp-search-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sp-search-results {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 240px;
  overflow-y: auto;
}

.sp-search-result {
  display: flex;
  align-items: stretch;
  gap: 6px;
}

.sp-search-play {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 10px;
  border: none;
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  text-align: left;
  color: var(--text);
  min-width: 0;
}

.sp-search-play:hover {
  background: rgba(255, 255, 255, 0.14);
}

.sp-search-queue-btn {
  width: 32px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.sp-search-queue-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
}

.sp-search-art {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sp-search-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sp-search-title {
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sp-search-subtitle {
  font-size: 0.76rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sp-queue-panel {
  display: flex;
  flex-direction: column;
}

.sp-queue-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 220px;
  overflow-y: auto;
}

.sp-queue-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  width: 100%;
  border: none;
  border-radius: 8px;
  background: none;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.sp-queue-row:hover {
  background: rgba(255, 255, 255, 0.1);
}

.sp-queue-art {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sp-queue-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sp-queue-title {
  font-size: 0.83rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sp-queue-subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.inline-form {
  display: flex;
  gap: 8px;
}

.inline-form input[type="text"] {
  flex: 1;
  min-width: 0;
}

.spotify-message {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-dim);
  min-height: 1.1em;
}

/* ---------------------------------------------------------------------- */
/* Form controls                                                          */
/* ---------------------------------------------------------------------- */

input[type="text"],
input[type="number"] {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
}

input[type="text"]::placeholder {
  color: rgba(245, 245, 247, 0.45);
}

input[type="color"] {
  width: 100%;
  height: 40px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.secondary-btn {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.text-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.85rem;
  align-self: flex-start;
  padding: 0;
}

.center-text-btn {
  align-self: center;
}

.secret-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.secret-input-wrap input {
  flex: 1;
  min-width: 0;
}

.secret-toggle-btn {
  align-self: center;
  white-space: nowrap;
}

/* ---------------------------------------------------------------------- */
/* Settings drawer                                                        */
/* ---------------------------------------------------------------------- */

.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: flex-end;
  z-index: 10;
}

.settings-overlay.hidden {
  display: none;
}

.settings-panel {
  width: min(380px, 100%);
  height: 100%;
  background: #161619;
  border-left: 1px solid var(--glass-border);
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slide-in 0.25s ease;
}

@keyframes slide-in {
  from { transform: translateX(20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.tabs {
  display: flex;
  gap: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 4px;
}

.tab-btn {
  flex: 1;
  padding: 8px 0;
  border: none;
  background: transparent;
  color: var(--text-dim);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text);
}

.tab-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tab-panel.hidden {
  display: none;
}

.tab-panel h3 {
  margin: 8px 0 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.tab-panel label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
}

.checkbox-label input {
  width: 16px;
  height: 16px;
}

.hint {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin: 0;
}

.preset-swatches {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.swatch {
  height: 48px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.swatch:hover {
  transform: scale(1.05);
}

.bg-yt-history {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 260px;
  overflow-y: auto;
}

.bg-yt-history-row {
  display: flex;
  align-items: stretch;
  gap: 6px;
}

.bg-yt-history-apply {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px;
  border-radius: 10px;
  border: none;
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  text-align: left;
  color: var(--text);
  min-width: 0;
}

.bg-yt-history-apply:hover {
  background: rgba(255, 255, 255, 0.14);
}

.bg-yt-history-thumb {
  width: 56px;
  height: 32px;
  border-radius: 6px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.bg-yt-history-title {
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.bg-yt-history-remove {
  width: 32px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  flex-shrink: 0;
}

.bg-yt-history-remove:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
}

.redirect-uri-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 8px 10px;
}

.redirect-uri-box code {
  font-size: 0.78rem;
  word-break: break-all;
  color: var(--text);
}

/* ---------------------------------------------------------------------- */
/* Toast                                                                   */
/* ---------------------------------------------------------------------- */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 20, 25, 0.9);
  border: 1px solid var(--glass-border);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  z-index: 20;
}

.toast.hidden {
  display: none;
}

/* ---------------------------------------------------------------------- */
/* Utility                                                                 */
/* ---------------------------------------------------------------------- */

.hidden {
  display: none !important;
}

/* ---------------------------------------------------------------------- */
/* Responsive                                                              */
/* ---------------------------------------------------------------------- */

@media (max-width: 420px) {
  .ring-wrap {
    width: 220px;
    height: 220px;
  }

  #time-display {
    font-size: 2.4rem;
  }

  .settings-panel {
    width: 100%;
  }
}