:root {
  --bg: #0f1115;
  --bg-soft: #171a21;
  --card: #1b1f28;
  --card-border: #2a2f3a;
  --text: #eef0f4;
  --text-dim: #9aa1ae;
  --accent: #6c8cff;
  --accent-soft: rgba(108, 140, 255, 0.15);
  --focus: #6c8cff;
  --short: #4fd1a5;
  --long: #ffb347;
  --danger: #ff6b6b;
  --radius: 18px;
}

:root[data-theme="light"] {
  --bg: #f3f4f8;
  --bg-soft: #e7e9f1;
  --card: #ffffff;
  --card-border: #dfe2ec;
  --text: #1c2030;
  --text-dim: #6a7085;
  --accent: #4a63e0;
  --accent-soft: rgba(74, 99, 224, 0.12);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

html.standalone, html.standalone body {
  height: 100%;
}

body {
  background: radial-gradient(circle at 20% -10%, #1c2130 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  display: flex;
  justify-content: center;
  padding: 32px 20px 60px;
  transition: background .3s ease, color .3s ease;
}

html.standalone body {
  min-height: 100vh;
}

:root[data-theme="light"] body {
  background: radial-gradient(circle at 20% -10%, #ffffff 0%, var(--bg) 55%);
}

.app {
  width: 100%;
  max-width: 920px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 420px) {
  .streak-label { display: none; }
  .streak { padding: 6px 10px; }
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  border: none;
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
}

.icon-btn:hover { color: var(--text); background: var(--bg-soft); }

.streak {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.streak-flame { filter: grayscale(1); opacity: 0.5; transition: all .3s ease; }
.streak.active .streak-flame { filter: grayscale(0); opacity: 1; }
#streakCount { color: var(--text); font-weight: 700; }

.layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 22px;
}

.stats-card { grid-column: 1 / -1; }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .stats-card { grid-column: auto; }
}

.timer-card, .tasks-card, .stats-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background .3s ease, border-color .3s ease;
}

.tasks-card, .stats-card { align-items: stretch; }

.mode-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-soft);
  padding: 4px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.mode-tab {
  border: none;
  background: transparent;
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
}

.mode-tab:hover { color: var(--text); }

.mode-tab.active {
  background: var(--accent-soft);
  color: var(--accent);
}

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

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

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

.ring-progress {
  fill: none;
  stroke: var(--focus);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 722.6;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.3s linear, stroke 0.4s ease;
}

.ring-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
  padding: 0 20px;
}

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

.current-task {
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.controls {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.btn {
  border: none;
  cursor: pointer;
  font-weight: 700;
  transition: transform .15s ease, filter .15s ease, background .2s ease;
}

.btn:active { transform: scale(0.94); }

.btn.primary {
  background: var(--accent);
  color: #0d0f14;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 1rem;
}

.btn.primary:hover { filter: brightness(1.1); }

.btn.primary.small {
  padding: 12px 18px;
  font-size: 0.85rem;
}

.btn.secondary {
  background: var(--bg-soft);
  color: var(--text-dim);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn.secondary:hover { color: var(--text); background: #232834; }

.session-dots {
  display: flex;
  gap: 8px;
  margin-top: 22px;
}

.session-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bg-soft);
  transition: all .3s ease;
}

.session-dot.done {
  background: var(--accent);
}

.music-panel {
  width: 100%;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: opacity .2s ease;
}

.music-panel.disabled { opacity: 0.45; pointer-events: none; }

.music-categories {
  display: flex;
  gap: 8px;
}

.music-cat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--card-border);
  background: var(--bg-soft);
  color: var(--text-dim);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all .2s ease;
}

.music-cat span {
  font-size: 0.65rem;
  font-weight: 600;
}

.music-cat:hover { color: var(--text); }

.music-cat.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.music-now {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
}

.music-toggle {
  width: 34px;
  height: 34px;
  font-size: 0.85rem;
  flex: none;
}

.music-toggle:disabled { opacity: 0.4; cursor: not-allowed; }

.music-track {
  font-size: 0.78rem;
  color: var(--text-dim);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tasks-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
}

.tasks-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

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

.task-form {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.task-form input {
  flex: 1;
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color .2s ease;
}

.task-form input:focus { border-color: var(--accent); }

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 340px;
  overflow-y: auto;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-soft);
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease;
}

.task-item:hover { border-color: var(--card-border); }

.task-item.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.task-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--card-border);
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  font-size: 0.7rem;
  transition: all .2s ease;
}

.task-item.completed .task-check {
  background: var(--short);
  border-color: var(--short);
  color: #0d0f14;
}

.task-text {
  flex: 1;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.task-pomos {
  font-size: 0.75rem;
  color: var(--text-dim);
  flex: none;
}

.task-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  opacity: 0;
  transition: opacity .15s ease, color .15s ease;
  flex: none;
}

.task-item:hover .task-delete { opacity: 1; }
.task-delete:hover { color: var(--danger); }

.empty-state {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  padding: 20px 10px;
  display: none;
}

.tasks-io {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--card-border);
}

.btn.secondary.small {
  width: auto;
  height: auto;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 0.78rem;
}

.stats-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.stat-tile {
  background: var(--bg-soft);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.stats-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 90px;
  padding: 0 4px;
}

.chart-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  height: 100%;
}

.chart-bar {
  width: 100%;
  max-width: 28px;
  background: var(--accent);
  border-radius: 6px 6px 2px 2px;
  min-height: 3px;
  transition: height .3s ease;
}

.chart-day {
  font-size: 0.68rem;
  color: var(--text-dim);
}

.foot {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  margin-bottom: 60px;
}

.celebration {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 50;
}

.confetti {
  position: absolute;
  top: -20px;
  width: 8px;
  height: 14px;
  border-radius: 2px;
  opacity: 0.9;
  animation: fall linear forwards;
}

@keyframes fall {
  to {
    transform: translateY(110vh) rotate(540deg);
    opacity: 0;
  }
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 10, 0.6);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-backdrop.open { display: flex; }

.modal {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.modal-header h3 { margin: 0; font-size: 1.1rem; }

.modal-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
}

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

.duration-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.duration-field input {
  background: var(--bg-soft);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 10px;
  border-radius: 10px;
  font-size: 0.95rem;
  width: 100%;
  outline: none;
}

.duration-field input:focus { border-color: var(--accent); }

.modal-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.install-steps {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.install-steps li {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text);
}

.install-steps li b {
  color: var(--accent);
}