:root {
  --bg: #eef2f9;
  --card-bg: #ffffff;
  --blue: #4a7cf6;
  --blue-dark: #3a63d6;
  --blue-soft: #e4ecff;
  --text: #1f2430;
  --text-muted: #7c8598;
  --border: #e4e8f0;
  --danger: #e2574c;
  --warn: #f0a13b;
  --warn-bg: #fff3e2;
  --ok: #2fb380;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, #eef4ff 0%, #eef2f9 220px, #eef2f9 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 20px 16px calc(40px + env(safe-area-inset-bottom));
}

/* --- Tarjeta del micrófono --- */
.mic-card {
  background: linear-gradient(180deg, #dfe9fb 0%, #eef2f9 100%);
  border-radius: var(--radius-lg);
  padding: 36px 20px 28px;
  text-align: center;
  margin-bottom: 18px;
}

.mic-btn {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: none;
  background: var(--blue);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(74, 124, 246, 0.35);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.mic-btn svg { width: 46px; height: 46px; }
.mic-btn:active { transform: scale(0.96); }

.mic-btn.listening {
  background: var(--danger);
  box-shadow: 0 0 0 0 rgba(226, 87, 76, 0.5);
  animation: pulse 1.4s infinite;
}

.mic-btn.unsupported {
  background: #b7bfcf;
  cursor: not-allowed;
  box-shadow: none;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(226, 87, 76, 0.45); }
  70% { box-shadow: 0 0 0 22px rgba(226, 87, 76, 0); }
  100% { box-shadow: 0 0 0 0 rgba(226, 87, 76, 0); }
}

.mic-label {
  margin: 16px 0 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* --- Tarjeta de entrada de texto --- */
.input-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 14px 16px 12px;
  margin-bottom: 22px;
  box-shadow: 0 2px 10px rgba(20, 30, 60, 0.05);
}

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

#taskInput {
  flex: 1;
  border: none;
  outline: none;
  font-size: 16px;
  padding: 10px 4px;
  color: var(--text);
  background: transparent;
}
#taskInput::placeholder { color: #a7afc0; }

.add-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}
.add-btn:active { background: #d3deff; }

.chips-row {
  display: flex;
  gap: 10px;
  border-top: 1px solid var(--border);
  margin-top: 10px;
  padding-top: 10px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: #f2f4f9;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.chip svg { width: 15px; height: 15px; }
.chip:active { background: #e6e9f2; }
.chip.active {
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-weight: 600;
}

.hidden-native-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* --- Secciones de tareas --- */
.tasks-section { margin-bottom: 20px; }

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  cursor: default;
  font: inherit;
  color: inherit;
}
.section-header.collapsible { cursor: pointer; }

.section-header h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  margin: 0;
}

.section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue-soft);
  font-size: 14px;
}
.section-icon.warn { background: var(--warn-bg); }

.section-count {
  color: var(--text-muted);
  font-size: 15px;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.task-list[hidden] {
  display: none;
}

.task-card {
  background: var(--card-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 14px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(20, 30, 60, 0.04);
  transition: opacity 0.25s ease, transform 0.25s ease, background-color 0.6s ease, border-color 0.6s ease;
}
.task-card.leaving { opacity: 0; transform: translateX(20px); }

.task-card.vencida { border: 1px solid #f6c9c4; background: #fff7f6; }
.task-card.porvencer { border: 1px solid #fbdca0; background: #fffaf0; }
.task-card.urgente { border-left: 4px solid var(--danger); }

.task-card.highlighted {
  background-color: var(--blue-soft) !important;
  border-color: var(--blue) !important;
}

.check-btn {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid #c7cede;
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.check-btn:active { transform: scale(0.94); }
.check-btn.done { background: var(--ok); border-color: var(--ok); }
.check-btn svg { width: 15px; height: 15px; }

.task-main { flex: 1; min-width: 0; cursor: pointer; }
.task-text {
  font-size: 15.5px;
  line-height: 1.35;
  word-break: break-word;
}
.task-meta {
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.task-meta .badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 999px;
  background: #f2f4f9;
}
.task-meta .badge.warn { background: var(--warn-bg); color: #a86a10; }
.task-meta .badge.danger { background: #fbe7e5; color: #b8362b; }
.task-meta .badge.urgente-badge { background: #fbe7e5; color: #b8362b; font-weight: 700; }

.task-actions {
  flex-shrink: 0;
  display: flex;
  gap: 4px;
}
.icon-btn {
  border: none;
  background: transparent;
  color: #aab2c5;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}
.icon-btn:active { background: #f2f4f9; }
.icon-btn.delete:active { color: var(--danger); }
.icon-btn svg { width: 18px; height: 18px; }

/* --- Edición inline --- */
.edit-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}
.edit-form input[type="text"] {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 15px;
  outline: none;
}
.edit-form input[type="text"]:focus { border-color: var(--blue); }
.edit-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.edit-row input[type="datetime-local"] {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 8px;
  font-size: 13px;
  flex: 1;
  min-width: 0;
}
.edit-row label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}
.edit-buttons {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.btn {
  border: none;
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-secondary { background: #f2f4f9; color: var(--text-muted); }
.btn-text { background: transparent; color: var(--danger); font-weight: 600; padding: 8px 6px; }

/* --- Calendario --- */
.calendar-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: 0 2px 8px rgba(20, 30, 60, 0.04);
  margin-bottom: 20px;
}
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.calendar-title {
  font-size: 16px;
  font-weight: 700;
}
.calendar-nav {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.calendar-nav:active { background: #f2f4f9; }
.calendar-nav svg { width: 18px; height: 18px; }
.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin-bottom: 6px;
}
.calendar-weekdays span {
  text-align: center;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
}
.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13.5px;
  color: var(--text);
  border-radius: 50%;
}
.calendar-day.has-tasks {
  background: var(--blue-soft);
  font-weight: 600;
  cursor: pointer;
}
.calendar-day.today {
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(74, 124, 246, 0.35);
}

.task-card.highlighted {
  animation: highlightPulse 1.4s ease-out 1;
}
@keyframes highlightPulse {
  0% { box-shadow: 0 0 0 0 rgba(74, 124, 246, 0.45); }
  100% { box-shadow: 0 0 0 14px rgba(74, 124, 246, 0); }
}

/* --- Estados vacíos --- */
.empty-state {
  border: 1.5px dashed #c9d2e6;
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* --- Login --- */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-screen[hidden] {
  display: none;
}
.auth-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 2px 10px rgba(20, 30, 60, 0.05);
  text-align: center;
}
.auth-card h1 {
  font-size: 20px;
  margin: 0 0 6px;
}
.auth-sub {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 20px;
}
.auth-card input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 15px;
  margin-bottom: 10px;
  outline: none;
  background: transparent;
  color: var(--text);
}
.auth-card input:focus { border-color: var(--blue); }
.auth-error {
  color: var(--danger);
  font-size: 13px;
  text-align: left;
  margin: 0 0 10px;
}
.auth-btn { width: 100%; margin-bottom: 8px; padding: 12px; font-size: 15px; }

/* --- Barra de usuario --- */
.user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 4px 14px;
}
.user-bar button {
  border: none;
  background: none;
  color: var(--blue-dark);
  font-weight: 600;
  cursor: pointer;
  font-size: 13px;
}

/* --- Toast --- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: #1f2430;
  color: #fff;
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  z-index: 50;
  max-width: 90vw;
}
.toast[hidden] {
  display: none;
}
.toast button {
  background: none;
  border: none;
  color: #9db4ff;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --card-bg: #1c202b;
    --text: #eef1f8;
    --text-muted: #9aa3b8;
    --border: #2b3040;
    --blue-soft: #26314f;
  }
  html, body {
    background: linear-gradient(180deg, #171c2c 0%, #12141c 220px, #12141c 100%);
  }
  .mic-card { background: linear-gradient(180deg, #202a44 0%, #12141c 100%); }
  .chip { background: #262b38; color: var(--text-muted); }
  .icon-btn:active { background: #262b38; }
  .calendar-nav:active { background: #262b38; }
  .btn-secondary { background: #262b38; }
  .task-meta .badge { background: #262b38; }
  .task-card.vencida { background: #2a1e1c; border-color: #4a2e2a; }
  .task-card.porvencer { background: #2a271b; border-color: #4a3f24; }
  .empty-state { border-color: #333a4d; }
}