:root {
  --bg-0: #0a0c11;
  --bg-1: #12151d;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --text-0: #eef1f7;
  --text-1: #9aa3b5;
  --accent: #5b8cff;
  --accent-2: #3ddc97;
  --danger: #ff6b6b;
  --shadow: 0 20px 40px -18px rgba(0, 0, 0, 0.55);
  --radius: 18px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-0: #eef1f6;
    --bg-1: #e3e7ef;
    --surface: rgba(255, 255, 255, 0.65);
    --surface-hover: rgba(255, 255, 255, 0.85);
    --border: rgba(20, 25, 40, 0.08);
    --text-0: #171a21;
    --text-1: #565f73;
    --shadow: 0 20px 40px -18px rgba(30, 40, 70, 0.25);
    color-scheme: light;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--text-0);
  background: radial-gradient(circle at 20% -10%, rgba(91, 140, 255, 0.12), transparent 45%),
    radial-gradient(circle at 90% 0%, rgba(61, 220, 151, 0.08), transparent 40%), var(--bg-0);
  min-height: 100vh;
  padding: 0 0 4rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 3rem) 1rem;
}

.topbar h1 {
  font-size: 1.6rem;
  margin: 0;
  letter-spacing: -0.02em;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn {
  font: inherit;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-0);
  border-radius: 999px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, border-color 0.15s ease;
  backdrop-filter: blur(12px);
}

.btn:hover {
  background: var(--surface-hover);
  border-color: rgba(91, 140, 255, 0.4);
}

.btn:active {
  transform: scale(0.97);
}

.btn-toolbar {
  font-weight: 500;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7aa2ff);
  border-color: transparent;
  color: white;
  font-weight: 600;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent), #7aa2ff);
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
}

.board {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 0 clamp(1rem, 4vw, 3rem);
  align-items: start;
}

.empty-state {
  text-align: center;
  color: var(--text-1);
  margin-top: 4rem;
  padding: 0 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem 1.3rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card.dragging {
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6);
  cursor: grabbing;
  opacity: 0.96;
}

.card-placeholder {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: rgba(91, 140, 255, 0.06);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.drag-handle {
  cursor: grab;
  color: var(--text-1);
  touch-action: none;
  user-select: none;
  padding: 0.1rem 0.3rem;
  border-radius: 6px;
}

.drag-handle:hover {
  background: var(--surface-hover);
}

.card-title {
  font-weight: 600;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.icon-btn {
  border: none;
  background: transparent;
  color: var(--text-1);
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
}

.icon-btn:hover {
  color: var(--text-0);
  background: var(--surface-hover);
}

/* ---- reloj ---- */
.clock-display {
  text-align: center;
  padding: 0.4rem 0 0.2rem;
}

.clock-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(2rem, 6vw, 2.5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.clock-meta {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  color: var(--text-1);
  font-size: 0.85rem;
  margin-top: 0.3rem;
  text-transform: capitalize;
}

.clock-offset {
  font-family: 'JetBrains Mono', monospace;
  opacity: 0.8;
}

/* ---- switch ---- */
.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
  flex-shrink: 0;
}

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

.slider {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.slider::before {
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.15s ease;
}

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

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

/* ---- alarma ---- */
.alarm-body {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.time-input {
  font: inherit;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  background: transparent;
  border: none;
  color: var(--text-0);
  width: 100%;
  text-align: center;
}

.day-chips {
  display: flex;
  gap: 0.35rem;
  justify-content: center;
}

.day-chip {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-1);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.15s ease;
}

.day-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.alarm-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.alarm-status {
  color: var(--text-1);
  font-size: 0.82rem;
}

/* ---- timer ---- */
.timer-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.ring-wrap {
  position: relative;
  width: 150px;
  height: 150px;
}

.ring-svg {
  width: 100%;
  height: 100%;
}

.ring-track {
  fill: none;
  stroke: var(--border);
  stroke-width: 8;
}

.ring-progress {
  fill: none;
  stroke: var(--accent-2);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.3s linear;
}

.timer-card.is-done .ring-progress {
  stroke: var(--danger);
}

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

.timer-inputs {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem;
}

.num-input {
  width: 2.6ch;
  background: transparent;
  border: none;
  color: var(--text-0);
  font: inherit;
  text-align: center;
  -moz-appearance: textfield;
  appearance: textfield;
}

.num-input::-webkit-inner-spin-button,
.num-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.timer-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-variant-numeric: tabular-nums;
}

.timer-actions,
.stopwatch-actions {
  display: flex;
  gap: 0.5rem;
}

/* ---- cronómetro ---- */
.stopwatch-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}

.stopwatch-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
}

.lap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  max-height: 140px;
  overflow-y: auto;
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
}

.lap-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0.4rem;
  color: var(--text-1);
  border-bottom: 1px solid var(--border);
}

/* ---- diálogo reloj ---- */
.clock-dialog {
  background: var(--bg-1);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: min(420px, 92vw);
  box-shadow: var(--shadow);
}

.clock-dialog::backdrop {
  background: rgba(5, 7, 12, 0.6);
  backdrop-filter: blur(3px);
}

.clock-dialog h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

#tz-search,
#rename-input {
  width: 100%;
  font: inherit;
  padding: 0.6rem 0.8rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-0);
  margin-bottom: 0.8rem;
}

.rename-dialog h2 {
  margin-bottom: 1rem;
}

.tz-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.tz-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.tz-list li:last-child {
  border-bottom: none;
}

.tz-list li:hover {
  background: var(--surface-hover);
}

.tz-region {
  color: var(--text-1);
  font-size: 0.8rem;
}

.tz-empty {
  color: var(--text-1);
  cursor: default;
  justify-content: center;
}

.tz-custom-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tz-custom-row input {
  flex: 1;
  font: inherit;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-0);
}

.tz-custom-row input.invalid {
  border-color: var(--danger);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
}

/* ---- overlay de alarma/timer ---- */
.ring-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 12, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.ring-overlay.show {
  opacity: 1;
}

.ring-box {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 2.5rem 3rem;
  text-align: center;
  box-shadow: var(--shadow);
  animation: pulse 1s ease-in-out infinite;
}

.ring-icon {
  font-size: 3rem;
  margin-bottom: 0.6rem;
}

.ring-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.ring-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

@media (max-width: 480px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}