:root {
  /* Paleta */
  --c-bg: #f8fafc;
  --c-surface: #ffffff;
  --c-border: #e7eaf3;
  --c-text: #1e293b;
  --c-text-muted: #64748b;

  --c-emerald: #10b981;      /* positivo / disponible / ingresos */
  --c-emerald-soft: #d1fae5;
  --c-indigo: #6366f1;       /* acento / primario / fondos */
  --c-indigo-soft: #e0e7ff;
  --c-amber: #f59e0b;        /* reservado / próximos pagos */
  --c-amber-soft: #fef3c7;
  --c-coral: #ef4444;        /* gastos / egresos */
  --c-coral-soft: #fee2e2;

  --radius-lg: 22px;
  --radius-md: 16px;
  --shadow-card: 0 2px 10px rgba(30, 41, 59, 0.06), 0 1px 2px rgba(30, 41, 59, 0.05);
  --shadow-float: 0 10px 24px rgba(99, 102, 241, 0.35);

  --nav-height: 68px;
  --topbar-height: 64px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  background: var(--c-bg);
}

body {
  margin: 0;
  padding-top: var(--topbar-height);
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom) + 0.5rem);
  font-size: 16px;
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .caja-card__label { font-family: inherit; }

.btn:focus, .btn:active:focus, .form-control:focus, .form-select:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

.btn-success { background: var(--c-emerald); border-color: var(--c-emerald); }
.btn-success:hover, .btn-success:active { background: #0ea472 !important; border-color: #0ea472 !important; }
.btn-danger { background: var(--c-coral); border-color: var(--c-coral); }
.btn-danger:hover, .btn-danger:active { background: #dc3939 !important; border-color: #dc3939 !important; }
.btn-primary, .btn-outline-primary:hover { background: var(--c-indigo); border-color: var(--c-indigo); }
.btn-outline-primary { color: var(--c-indigo); border-color: var(--c-indigo); }
.btn-outline-success { color: var(--c-emerald); border-color: var(--c-emerald); }
.btn-outline-secondary { color: var(--c-text-muted); border-color: var(--c-border); }

.btn { border-radius: 14px; font-weight: 600; }

/* ---- Barra superior ---- */
.app-topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.1rem;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  z-index: 1030;
}

.app-topbar__identity {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.app-topbar__text { min-width: 0; }

.app-topbar__title {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--c-text);
  line-height: 1.15;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-topbar__subtitle {
  font-size: 0.72rem;
  color: var(--c-text-muted);
  white-space: nowrap;
}

.app-topbar__logout {
  border: none;
  background: var(--c-bg);
  color: var(--c-text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  flex-shrink: 0;
}

/* ---- Avatares ---- */
.caja-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  color: #fff;
  flex-shrink: 0;
  position: relative;
}

.caja-avatar--sm { width: 28px; height: 28px; font-size: 0.72rem; }

.caja-avatar[data-user="isaac"] { background: linear-gradient(135deg, #6366f1, #818cf8); }
.caja-avatar[data-user="katy"] { background: linear-gradient(135deg, #f59e0b, #fb923c); }
.caja-avatar[data-user="_"] { background: linear-gradient(135deg, #94a3b8, #cbd5e1); }

.caja-avatar__dot {
  position: absolute;
  bottom: -1px; right: -1px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-emerald);
  border: 2px solid var(--c-surface);
}

.caja-inline-avatar {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ---- Contenido ---- */
.app-content {
  padding: 1rem;
  max-width: 640px;
  margin: 0 auto;
}

/* ---- Barra inferior de navegación ---- */
.app-bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--nav-height) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: flex;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  z-index: 1030;
  box-shadow: 0 -2px 12px rgba(30, 41, 59, 0.05);
}

.app-bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.4rem 0;
}

.app-bottom-nav__icon {
  width: 38px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  transition: background 0.15s ease, color 0.15s ease;
}

.app-bottom-nav__item.is-active { color: var(--c-indigo); }
.app-bottom-nav__item.is-active .app-bottom-nav__icon {
  background: var(--c-indigo-soft);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.08);
}

/* ---- Botón flotante (FAB) ---- */
.caja-fab {
  position: fixed;
  right: 1.1rem;
  bottom: calc(var(--nav-height) + env(safe-area-inset-bottom) + 1rem);
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-indigo), #818cf8);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.9rem;
  font-weight: 300;
  line-height: 1;
  box-shadow: var(--shadow-float);
  text-decoration: none;
  z-index: 1020;
}
.caja-fab:hover, .caja-fab:active { color: #fff; transform: scale(1.04); }

/* ---- Tarjetas ---- */
.caja-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem;
  margin-bottom: 0.9rem;
  box-shadow: var(--shadow-card);
}

.caja-card__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text-muted);
  margin-bottom: 0.2rem;
}

.caja-card__amount {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -0.01em;
}

.caja-card__amount.is-negative { color: var(--c-coral); }
.caja-card__amount.is-positive { color: var(--c-emerald); }

/* Tarjeta hero de "Disponible" */
.caja-hero {
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.4rem;
  margin-bottom: 0.9rem;
  background: linear-gradient(135deg, var(--c-emerald) 0%, #34d399 100%);
  color: #fff;
  box-shadow: 0 10px 24px rgba(16, 185, 129, 0.3);
}
.caja-hero.is-negative { background: linear-gradient(135deg, #ef4444 0%, #f87171 100%); box-shadow: 0 10px 24px rgba(239, 68, 68, 0.3); }
.caja-hero__label { font-size: 0.85rem; font-weight: 600; opacity: 0.92; margin-bottom: 0.2rem; }
.caja-hero__amount { font-size: 2.3rem; font-weight: 800; letter-spacing: -0.02em; }
.caja-hero__sub { font-size: 0.8rem; font-weight: 600; opacity: 0.92; margin-top: 0.4rem; }

.caja-summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.caja-tile {
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow-card);
}
.caja-tile--amber { background: var(--c-amber-soft); }
.caja-tile--indigo { background: var(--c-indigo-soft); }
.caja-tile__label { font-size: 0.78rem; font-weight: 700; color: var(--c-text-muted); }
.caja-tile__value { font-size: 1.3rem; font-weight: 800; color: var(--c-text); }

/* ---- Pill / chip de próximo ingreso ---- */
.caja-pill-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.9rem; }
.caja-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--c-indigo-soft);
  color: var(--c-indigo);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
}
.caja-pill__amount { color: var(--c-emerald); }

/* ---- Listas de movimientos / obligaciones ---- */
.caja-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-border);
}

.caja-list-item:last-child { border-bottom: none; }

.caja-list-item__main { display: flex; align-items: center; gap: 0.7rem; min-width: 0; }
.caja-list-item__desc { font-weight: 700; font-size: 0.95rem; }
.caja-list-item__meta { font-size: 0.76rem; color: var(--c-text-muted); }

.caja-icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
  background: var(--c-indigo-soft);
}

.caja-amount--income { color: var(--c-emerald); font-weight: 700; white-space: nowrap; }
.caja-amount--expense { color: var(--c-coral); font-weight: 700; white-space: nowrap; }
.caja-amount--neutral { color: var(--c-amber); font-weight: 700; white-space: nowrap; }

.caja-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--c-emerald-soft);
  color: #047857;
}

.caja-badge--warn { background: var(--c-amber-soft); color: #92400e; }
.caja-badge--danger { background: var(--c-coral-soft); color: #b91c1c; }
.caja-badge--voided { background: #e2e8f0; color: var(--c-text-muted); text-decoration: line-through; }

/* ---- Estado vacío festivo ---- */
.caja-empty {
  text-align: center;
  padding: 1.5rem 1rem;
}
.caja-empty__icon { font-size: 2.4rem; margin-bottom: 0.4rem; }
.caja-empty__text { color: var(--c-text-muted); font-weight: 600; font-size: 0.92rem; }

/* ---- Barra de progreso pagadas/pendientes ---- */
.caja-progress {
  height: 10px;
  border-radius: 999px;
  background: var(--c-coral-soft);
  overflow: hidden;
  margin: 0.5rem 0;
}
.caja-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-emerald), #34d399);
  border-radius: 999px;
}

/* ---- Formularios grandes y táctiles ---- */
.caja-form .form-control,
.caja-form .form-select {
  font-size: 1.05rem;
  padding: 0.7rem 0.95rem;
  border-radius: 14px;
  border-color: var(--c-border);
}

.caja-form label.form-label { font-weight: 700; font-size: 0.85rem; color: var(--c-text); }

.caja-form .btn {
  font-size: 1.05rem;
  padding: 0.75rem 1rem;
}

.app-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: linear-gradient(160deg, #eef2ff 0%, #f8fafc 60%);
}

.app-login__card {
  width: 100%;
  max-width: 380px;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-card);
}

/* Calendario/Checklist de pagos (docs/FINANCIAL_RULES.md sección 14) */
.caja-tabs {
  display: flex;
  gap: 0.4rem;
  background: var(--c-indigo-soft);
  border-radius: var(--radius-md);
  padding: 0.3rem;
  margin-bottom: 0.9rem;
}
.caja-tabs__item {
  flex: 1;
  text-align: center;
  padding: 0.5rem 0.6rem;
  border-radius: calc(var(--radius-md) - 4px);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--c-indigo);
  text-decoration: none;
}
.caja-tabs__item.is-active { background: var(--c-surface); box-shadow: var(--shadow-card); }

.caja-quincena-title { font-weight: 700; font-size: 0.85rem; color: var(--c-text-muted); margin: 1rem 0 0.4rem; }
.caja-quincena-title:first-child { margin-top: 0; }

.caja-checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--c-border);
  cursor: pointer;
}
.caja-checklist-item:last-child { border-bottom: none; }
.caja-checklist-item input[type="checkbox"] { width: 1.25rem; height: 1.25rem; margin-top: 0.15rem; accent-color: var(--c-emerald); flex-shrink: 0; }
.caja-checklist-item__body { min-width: 0; }
.caja-checklist-item__title { font-weight: 700; font-size: 0.95rem; }
.caja-checklist-item__meta { font-size: 0.76rem; color: var(--c-text-muted); }

.caja-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.3rem;
  text-align: center;
}
.caja-calendar-day {
  position: relative;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--c-bg);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  border: 2px solid transparent;
}
.caja-calendar-day.is-selected { border-color: var(--c-indigo); }
.caja-calendar-day__dots { position: absolute; bottom: 3px; display: flex; gap: 2px; }
.caja-calendar-day__dot { width: 5px; height: 5px; border-radius: 50%; }
.caja-calendar-day__dot--paid { background: var(--c-emerald); }
.caja-calendar-day__dot--pending { background: var(--c-coral); }
.caja-calendar-day__dot--income { background: var(--c-indigo); }
.caja-calendar-legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.76rem; color: var(--c-text-muted); margin-top: 0.7rem; }
.caja-calendar-legend span { display: inline-flex; align-items: center; gap: 0.3rem; }
.caja-calendar-legend i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

/* Edición inline con <details>/<summary>, sin JavaScript, dentro de listas (gastos fijos, pasivos). */
.caja-edit-toggle { padding: 0.4rem 0 0.8rem; border-bottom: 1px solid var(--c-border); }
.caja-edit-toggle:last-child { border-bottom: none; }
.caja-edit-toggle summary { cursor: pointer; font-size: 0.8rem; font-weight: 700; color: var(--c-indigo); list-style: none; }
.caja-edit-toggle summary::-webkit-details-marker { display: none; }
.caja-edit-toggle summary::before { content: "✎ "; }

/* <dialog> de confirmación (reemplaza confirm()/prompt() nativos, sección "UX del formulario"). */
.caja-dialog {
  border: none;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: min(90vw, 360px);
  box-shadow: 0 20px 40px rgba(30, 41, 59, 0.25);
}
.caja-dialog::backdrop { background: rgba(15, 23, 42, 0.5); }
.caja-dialog__message { font-weight: 600; color: var(--c-text); margin-bottom: 1.25rem; }
.caja-dialog__actions { display: flex; gap: 0.6rem; }
.caja-dialog__actions .btn { flex: 1; }

/* Pestañas de tipo (Gasto/Ingreso) en /Registrar, mismo look que .caja-tabs de Calendario. */
.caja-collapsible summary { cursor: pointer; font-weight: 700; font-size: 0.85rem; color: var(--c-indigo); list-style: none; padding: 0.5rem 0; }
.caja-collapsible summary::-webkit-details-marker { display: none; }
.caja-collapsible summary::before { content: "⚙️ "; }