/* Tema: paleta neutra basada en jesuhrz.com; el verde (--accent-on) es semántico de Despierto.
   Estrategia de 3 estados:
     - sin [data-theme]  -> sigue el sistema (media query de abajo)
     - [data-theme=light]-> fuerza claro
     - [data-theme=dark] -> fuerza oscuro
   El toggle escribe data-theme en <html> y lo persiste; un script inline en <head> lo
   aplica antes del primer paint para evitar el flash de tema incorrecto. */
:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --bg-2: #e9ebef;
  --fg: #18181b;
  --card: #ffffff;
  --card-rgb: 255, 255, 255;
  --border: #e5e7eb;
  --accent-off: #6b7280;
  --accent-on: #16a34a;
  --accent-auto: #2277ff;
  --shadow-sm: 0 2px 10px rgba(17, 24, 39, 0.07);
  --shadow: 0 10px 34px rgba(17, 24, 39, 0.10);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d0d17;
    --fg: #ffffff;
    --card: #18181b;
    --card-rgb: 24, 24, 27;
    --border: #27272a;
    --accent-off: #9ca3af;
    --accent-on: #22c55e;
    --accent-auto: #4b9bff;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d0d17;
  --bg-2: #09090f;
  --fg: #ffffff;
  --card: #18181b;
  --card-rgb: 24, 24, 27;
  --border: #27272a;
  --accent-off: #9ca3af;
  --accent-on: #22c55e;
  --accent-auto: #4b9bff;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
  --shadow: 0 10px 34px rgba(0, 0, 0, 0.5);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  /* Gradiente sutil en vez de color plano: da profundidad y suaviza el light mode */
  background: linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
/* Transición suave al alternar tema (evita el "salto" brusco al cambiar) */
body,
.card,
.tabs,
.theme-toggle,
.history-clear,
.history-feed__item {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 3rem;
  text-align: center;
  max-width: 360px;
  width: 90%;
  box-shadow: var(--shadow);
}
h1 {
  font-size: 1.4rem;
  margin: 0 0 0.25rem;
}
.card__subtitle {
  color: var(--accent-off);
  font-size: 0.9rem;
  margin: 0 0 1.75rem;
}
.card__dot-wrap {
  position: relative;
  width: 14px;
  height: 14px;
  margin: 0 auto 1.75rem;
}
.card__dot {
  position: absolute;
  inset: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-off);
  transition: background 0.2s;
}
.card__dot.is-on {
  background: var(--accent-on);
}
.card__dot-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent-on);
  opacity: 0;
}
.card__dot-wrap.is-on::after {
  animation: ping 1.5s ease-out infinite;
}
@keyframes ping {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(2.8);
    opacity: 0;
  }
}
button {
  width: 100%;
  padding: 0.85rem;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--fg);
  color: var(--bg);
  transition: opacity 0.15s;
}
button:hover { opacity: 0.85; }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-auto);
  outline-offset: 2px;
}
.card__status {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--accent-off);
  min-height: 1.2em;
}
.card__timer {
  font-variant-numeric: tabular-nums;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: var(--accent-off);
}
.card__timer.is-on {
  color: var(--fg);
}
.card__remaining {
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  color: var(--accent-auto);
  min-height: 1.2em;
  margin-bottom: 0.5rem;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.tabs {
  display: flex;
  gap: 0.3rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.25rem;
  margin-bottom: 1.25rem;
}
.tabs__btn {
  flex: 1;
  width: auto;
  padding: 0.5rem 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  color: var(--accent-off);
  border-radius: 7px;
}
.tabs__btn:hover { opacity: 1; background: var(--border); }
.tabs__btn.is-active {
  background: var(--card);
  color: var(--fg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}
fieldset.duration-picker {
  margin: 0 0 1.25rem;
  padding: 0;
  border: none;
  text-align: left;
  /* Layout en columna con ritmo uniforme: evita el look "todo pegado" */
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
/* Sin esto, el `display: flex` de arriba anula el atributo [hidden] y el panel
   quedaría visible en modo Cronómetro (rompe el cambio de tabs). */
fieldset.duration-picker[hidden] {
  display: none;
}
.duration-picker.is-disabled {
  opacity: 0.45;
  pointer-events: none;
}
.duration-picker__presets {
  display: flex;
  gap: 0.5rem;
}
.duration-picker__btn {
  width: auto;
  flex: 1;
  padding: 0.65rem 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 8px;
}
.duration-picker__btn:hover { opacity: 1; background: var(--border); }
.duration-picker__btn.is-active {
  background: var(--accent-on);
  border-color: var(--accent-on);
  color: #fff;
}
/* Separador "o manual" con líneas a los costados */
.duration-picker__divider {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-off);
}
.duration-picker__divider::before,
.duration-picker__divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.duration-picker__field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.duration-picker__custom-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--fg);
  margin: 0;
}
.duration-picker__custom-input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
}
.duration-picker__hint {
  font-size: 0.72rem;
  color: var(--accent-off);
  margin: 0;
  line-height: 1.5;
}
.duration-picker__selected {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-auto);
  margin: 0;
  min-height: 1.1em;
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent-auto) 12%, transparent);
  text-align: center;
}

/* Historial tipo overlay de chat de streaming: fijo a la derecha, transparente, siempre visible */
.history-feed {
  position: fixed;
  top: 3.75rem;
  right: 1rem;
  bottom: 4vh;
  width: 300px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  overflow-y: auto;
  padding: 0.5rem;
}
.history-feed::-webkit-scrollbar { width: 4px; }

/* Toggle de tema: botón-icono fijo arriba-izquierda */
.theme-toggle {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 10;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  display: grid;
  place-items: center;
  color: var(--fg);
  background: rgba(var(--card-rgb), 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}
.theme-toggle:hover { opacity: 1; background: rgba(var(--card-rgb), 0.85); }
.theme-toggle svg { width: 18px; height: 18px; display: block; }
/* Ícono según el tema EFECTIVO (sistema o forzado), sin depender de JS */
.theme-toggle__moon { display: none; }
.theme-toggle__sun { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle__moon { display: block; }
}
:root[data-theme="dark"] .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon { display: block; }
:root[data-theme="light"] .theme-toggle__sun { display: block; }
:root[data-theme="light"] .theme-toggle__moon { display: none; }

.history-clear {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 10;
  width: auto;
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(var(--card-rgb), 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--accent-off);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}
.history-clear:hover { opacity: 1; color: var(--fg); }
@media (max-width: 860px) {
  .history-clear { display: none; }
}
.history-feed__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.history-feed__item {
  position: relative;
  pointer-events: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.85rem 0.6rem 0.95rem;
  font-size: 0.92rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  animation: chatIn 0.3s ease;
}
/* Barra izquierda con gradiente (verde->teal cronómetro, azul->cyan temporizador) */
.history-feed__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-on), #0d9488);
}
.history-feed__item--timer::before {
  background: linear-gradient(180deg, var(--accent-auto), #22d3ee);
}
@keyframes chatIn {
  from { opacity: 0; transform: translateX(14px); }
  to { opacity: 1; transform: translateX(0); }
}
.history-feed__row {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin-bottom: 0.15rem;
}
.history-feed__seq {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.72rem;
  color: var(--accent-off);
}
.history-feed__date {
  color: var(--accent-off);
  font-size: 0.8rem;
}
.history-feed__duration {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1rem;
}
.history-feed__reason {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-on); /* cronómetro = verde (default) */
}
.history-feed__item--timer .history-feed__reason {
  color: var(--accent-auto); /* temporizador = azul */
}
.history-feed__empty {
  pointer-events: none;
  color: var(--accent-off);
  font-size: 0.85rem;
  text-align: right;
  margin: 0 0.5rem;
}
@media (max-width: 860px) {
  .history-feed { display: none; }
}
