:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --normal: #22c55e;
  --warning: #f59e0b;
  --high: #ef4444;
  --accent: #3b82f6;
}

/* Background themes — swap the palette, keep risk colors (normal/warning/high)
   fixed since those are semantic, not stylistic. */
:root[data-focus-theme="midnight"] {
  --bg: linear-gradient(160deg, #0a0a1f 0%, #14103a 100%);
  --surface: #171335;
  --border: #2e2a5c;
  --accent: #818cf8;
}

:root[data-focus-theme="forest"] {
  --bg: linear-gradient(160deg, #071a12 0%, #0f2b1c 100%);
  --surface: #12261a;
  --border: #234433;
  --accent: #34d399;
}

:root[data-focus-theme="sunset"] {
  --bg: linear-gradient(160deg, #1a0f0a 0%, #3a1a10 100%);
  --surface: #2a1810;
  --border: #4d2c1c;
  --accent: #fb923c;
}

:root[data-focus-theme="ocean"] {
  --bg: linear-gradient(160deg, #051620 0%, #0a2e3d 100%);
  --surface: #0e2530;
  --border: #1c4353;
  --accent: #22d3ee;
}

body {
  transition: background 0.4s ease;
}

header, .panel, .focus-btn, .analyze-btn {
  transition: background 0.4s ease, border-color 0.4s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

/* App-shell layout: the page itself never scrolls — header/footer are
   fixed-height, main fills what's left, and any panel with more content
   than fits (e.g. a long LLM narrative) scrolls internally instead. */
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

header {
  flex-shrink: 0;
  padding: 0.85rem 1.75rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
}

header h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

header .subtitle {
  color: var(--muted);
  font-size: 0.875rem;
}

.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--normal);
  border-radius: 50%;
  margin-right: 6px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

main {
  flex: 1;
  min-height: 0;
  padding: 1rem 1.75rem;
  max-width: 1800px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---------------- Tabs ---------------- */

.tab-nav {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.tab-view {
  display: none;
  flex: 1;
  min-height: 0;
}

.tab-view.active {
  display: flex;
  flex-direction: column;
}

/* ---------------- Details layout ---------------- */

.details-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 1100px) {
  .details-grid { grid-template-columns: 1fr; }
}

.details-main,
.details-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
}

.details-main .panel:has(.chart-wrap) {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.details-main .chart-wrap {
  flex: 1;
  min-height: 120px;
}

/* The sidebar itself never scrolls — Warnings keeps its natural height and
   Advice/Insight share whatever's left, each scrolling its own content area
   (see .advice-content) instead of the whole cluster growing/scrolling. */
.details-side > .panel {
  flex-shrink: 0;
}

.advice-panel,
.insight-panel {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.cards {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.6rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  min-width: 0;
  overflow: hidden;
}

.card .label {
  color: var(--muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card .value {
  font-size: 1.05rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card .unit {
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 400;
}

.risk-normal { color: var(--normal); }
.risk-warning { color: var(--warning); }
.risk-high { color: var(--high); }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
}

.panel h2 {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.65rem;
}

.chart-wrap {
  position: relative;
  height: 280px;
}

.alert-list {
  list-style: none;
}

.alert-item {
  padding: 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--border);
  font-size: 0.875rem;
}

.alert-item.warning { border-left-color: var(--warning); }
.alert-item.high { border-left-color: var(--high); }

.alert-item .time {
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

.alert-item .msg {
  margin-top: 0.25rem;
}

.empty {
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
  padding: 2rem;
}

footer {
  flex-shrink: 0;
  text-align: center;
  padding: 0.4rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.advice-panel {
  border-color: var(--accent);
}

.advice-panel.has-advice {
  border-left: 4px solid var(--accent);
}

.advice-summary {
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.advice-summary p { margin-bottom: 0.5rem; }
.advice-summary p:last-child { margin-bottom: 0; }
.advice-summary ul, .advice-summary ol { margin: 0 0 0.5rem 1.1rem; }
.advice-summary li { margin-bottom: 0.25rem; }
.advice-summary strong { color: var(--text); }
.advice-summary code {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
  font-size: 0.85em;
}

/* Content is unbounded LLM narrative — the panel header/status stay put and
   this area fills whatever space the panel has, scrolling internally instead
   of growing the panel (and cutting text at an arbitrary fixed height). */
.advice-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.advice-content::-webkit-scrollbar {
  width: 6px;
}

.advice-content::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}

.advice-recs {
  margin-left: 1.1rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.advice-recs li {
  margin-bottom: 0.25rem;
  color: var(--text);
}

.advice-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

.analyze-btn {
  width: 100%;
  padding: 0.7rem 0.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.analyze-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.analyze-status {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.5rem;
  text-align: center;
}

.rules-info {
  text-align: center;
  padding: 0.75rem;
  font-size: 0.7rem;
  color: var(--muted);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel-header h2 {
  margin-bottom: 0;
}

.insight-btn {
  width: auto;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.insight-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0.5rem 0 0.75rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.insight-panel {
  border-color: var(--accent);
}

.focus-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem 1.5rem;
}

.focus-mode-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent);
}

.focus-mode-badge.mode-break {
  background: rgba(34, 197, 94, 0.12);
  color: var(--normal);
}

.focus-ring-wrap {
  position: relative;
  width: 220px;
  height: 220px;
}

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

.focus-ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 10;
}

.focus-ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

.focus-time {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.focus-controls {
  display: flex;
  gap: 0.75rem;
}

.focus-btn {
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.focus-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.focus-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

.nav-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
}

.nav-link:hover {
  text-decoration: underline;
}

/* ---------------- Header ---------------- */

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* ---------------- Focus + tasks layout ---------------- */

.focus-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: stretch;
}

@media (max-width: 900px) {
  /* Stacked single column: the hero's natural height plus a usable task list
     no longer both fit the no-scroll shell, so let this cluster scroll instead
     (the task-panel min-height floor that makes the list usable here lives
     next to the base .task-panel rule below, in the Task list section — it
     has to come after that rule in source order to win the cascade tie). */
  .focus-grid {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }
}

.focus-active-task {
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 600;
  text-align: center;
}

/* ---------------- Task list ---------------- */

.task-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

@media (max-width: 900px) {
  /* Give the task list room to show more than one row once it's stacked
     under the hero (see the .focus-grid override above) — otherwise CSS
     Grid's auto-track sizing shrinks this panel toward its content minimum,
     since every box in this flex chain opts into min-height: 0. */
  .task-panel {
    min-height: 280px;
  }
}

.task-form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.task-form input {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 0.875rem;
}

.task-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.task-form button {
  width: auto;
  padding: 0.6rem 1.1rem;
}

.task-list {
  list-style: none;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.5rem;
  border-radius: 8px;
  margin-bottom: 0.35rem;
  background: rgba(255, 255, 255, 0.03);
}

.task-item.active {
  border-left: 3px solid var(--accent);
}

.task-item.done .task-text {
  text-decoration: line-through;
  color: var(--muted);
}

.task-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
  cursor: pointer;
}

.task-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.875rem;
}

.task-pomo {
  font-size: 0.75rem;
  color: var(--muted);
  flex-shrink: 0;
}

.task-select,
.task-delete {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.15rem 0.35rem;
  flex-shrink: 0;
}

.task-select:hover { color: var(--accent); }
.task-delete:hover { color: var(--high); }

.task-select:disabled {
  opacity: 0.3;
  cursor: default;
}

.task-select:disabled:hover {
  color: var(--muted);
}

/* ---------------- Settings panel ---------------- */

.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: flex-end;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.settings-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.settings-panel {
  width: min(360px, 90vw);
  height: 100%;
  background: var(--surface);
  border-left: 1px solid var(--border);
  padding: 1.5rem;
  overflow-y: auto;
  transform: translateX(20px);
  transition: transform 0.25s ease;
}

.settings-overlay.open .settings-panel {
  transform: translateX(0);
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.settings-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.settings-group {
  margin-bottom: 1.75rem;
}

.settings-group h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.settings-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
}

.settings-row-value {
  color: var(--muted);
}

.settings-group input[type="range"] {
  width: 100%;
  margin-bottom: 1rem;
  accent-color: var(--accent);
}

.sound-options,
.theme-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.sound-btn {
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 0.75rem;
  cursor: pointer;
}

/* ---------------- Custom music (YouTube) ---------------- */

.yt-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.yt-row input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 0.8rem;
}

.yt-row input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.yt-row button {
  width: auto;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.yt-status {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: -0.4rem;
  margin-bottom: 0.5rem;
  min-height: 1em;
}

.yt-hidden {
  position: fixed;
  top: -9999px;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.sound-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.theme-swatch {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
}

.theme-swatch.selected {
  border-color: var(--text);
}

.theme-swatch.theme-slate { background: linear-gradient(135deg, #0f1419, #3b82f6); }
.theme-swatch.theme-midnight { background: linear-gradient(135deg, #14103a, #818cf8); }
.theme-swatch.theme-forest { background: linear-gradient(135deg, #0f2b1c, #34d399); }
.theme-swatch.theme-sunset { background: linear-gradient(135deg, #3a1a10, #fb923c); }
.theme-swatch.theme-ocean { background: linear-gradient(135deg, #0a2e3d, #22d3ee); }

/* ---------------- Header risk pill ---------------- */

.risk-pill {
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
}

.risk-pill.risk-normal { color: var(--normal); }
.risk-pill.risk-warning { color: var(--warning); }
.risk-pill.risk-high {
  color: var(--high);
  background: rgba(239, 68, 68, 0.12);
}

/* ---------------- Toggle switch (voice reminders) ---------------- */

.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
}

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

.switch-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s;
}

.switch-slider::before {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}

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

.switch input:checked + .switch-slider::before {
  transform: translateX(18px);
}