:root {
  --bg: #0b1120;
  --bg-card: #151f32;
  --bg-card-hover: #1d2a44;
  --bg-input: #0f172a;
  --border: rgba(148, 163, 184, 0.16);
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --primary-dark: #0284c7;
  --accent-xmas: #f43f5e;
  --whatsapp: #22c55e;
  --whatsapp-dark: #16a34a;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 16px;
  --radius-sm: 11px;
  --shadow: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top right, #1e1b4b 0%, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 100px;
  line-height: 1.45;
}

.app-shell {
  max-width: 780px;
  margin: 0 auto;
  padding: calc(14px + env(safe-area-inset-top, 0px)) 14px calc(24px + env(safe-area-inset-bottom, 0px));
}

/* Header */
.top-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(21, 31, 50, 0.85);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: sticky;
  top: calc(8px + env(safe-area-inset-top, 0px));
  z-index: 40;
  box-shadow: var(--shadow);
}

@media (max-width: 520px) {
  .top-header {
    flex-direction: column;
    align-items: stretch;
  }
  .header-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1.3fr 1.1fr 1fr auto;
    gap: 6px;
  }
  .header-actions .btn-icon {
    justify-content: center;
    padding: 8px 6px;
    font-size: 0.78rem;
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, #be123c, #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.74rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
  display: inline-block;
}
.sync-dot.connected {
  background: var(--whatsapp);
  box-shadow: 0 0 8px var(--whatsapp);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 11px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.18s ease;
}

.btn-icon:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.4);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6366f1);
  color: #fff;
  border: none;
  padding: 10px 15px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 6px 18px -4px rgba(56, 189, 248, 0.45);
}

/* KPI Stats */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 13px;
}

.kpi-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.kpi-value {
  font-size: 1.25rem;
  font-weight: 800;
  margin-top: 3px;
  letter-spacing: -0.02em;
}

.kpi-value.green { color: #4ade80; }
.kpi-value.amber { color: #fbbf24; }
.kpi-value.blue  { color: #38bdf8; }

.kpi-sub {
  font-size: 0.71rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Controls & Filters */
.controls-bar {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-row {
  display: flex;
  gap: 8px;
}

.search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  outline: none;
}
.search-input:focus {
  border-color: var(--primary);
}

.date-filter-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color-scheme: dark;
}

.chips-scroll {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}
.chips-scroll::-webkit-scrollbar {
  display: none;
}

.chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.15s;
}
.chip.active {
  background: rgba(56, 189, 248, 0.18);
  color: var(--primary);
  border-color: var(--primary);
}

/* Sessions List */
.sessions-container {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.day-group-header {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 4px 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.session-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 15px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease;
  position: relative;
  overflow: hidden;
}

.session-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--primary);
}
.session-card[data-type="Sesión Navideña"]::before { background: #f43f5e; }
.session-card[data-type="Boda"]::before { background: #eab308; }
.session-card[data-type="XV Años"]::before { background: #a855f7; }
.session-card[data-type="Sesión Exterior"]::before { background: #22c55e; }

.session-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.type-badge {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
}

.session-card[data-type="Sesión Navideña"] .type-badge {
  background: rgba(244, 63, 94, 0.18);
  color: #fda4af;
}

.time-pill {
  font-size: 0.8rem;
  font-weight: 700;
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.07);
  padding: 3px 9px;
  border-radius: 7px;
}

.sync-badge {
  font-size: 0.68rem;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-muted);
}
.sync-badge.synced {
  background: rgba(34, 197, 94, 0.14);
  color: #86efac;
}

.client-name {
  font-size: 1.12rem;
  font-weight: 700;
  margin-top: 8px;
}

.package-info {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
  font-size: 0.8rem;
  color: #cbd5e1;
}

/* Financial Box inside Card */
.finance-strip {
  margin-top: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  text-align: center;
}

.fin-item-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.fin-item-val {
  font-size: 0.95rem;
  font-weight: 800;
  margin-top: 1px;
}

.fin-item-val.due { color: #fbbf24; }
.fin-item-val.paid { color: #4ade80; }

.session-notes {
  margin-top: 9px;
  font-size: 0.8rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.03);
  padding: 7px 10px;
  border-radius: 8px;
  border-left: 3px solid rgba(148, 163, 184, 0.35);
}

/* Card Action Buttons */
.card-actions {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.btn-wa {
  flex: 1.4;
  min-width: 155px;
  background: rgba(34, 197, 94, 0.16);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #86efac;
  padding: 9px 11px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-wa:hover {
  background: rgba(34, 197, 94, 0.26);
}

.btn-act {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 10px;
  border-radius: 10px;
  font-size: 0.79rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.btn-act:hover {
  border-color: var(--primary);
}
.btn-act.danger:hover {
  border-color: var(--danger);
  color: #fca5a5;
}

/* Floating New Session Button on Mobile */
.fab-new {
  position: fixed;
  bottom: 22px;
  right: 20px;
  background: linear-gradient(135deg, #f43f5e, #e11d48);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 14px 22px;
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: 0 12px 28px -4px rgba(244, 63, 94, 0.65);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 45;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 20, 0.78);
  backdrop-filter: blur(6px);
  display: none;
  align-items: flex-end;
  justify-content: center;
  z-index: 60;
  padding: 0;
}
.modal-backdrop.open {
  display: flex;
}

@media (min-width: 640px) {
  .modal-backdrop {
    align-items: center;
    padding: 20px;
  }
}

.modal-sheet {
  background: var(--bg-card);
  border: 1px solid var(--border);
  width: 100%;
  max-width: 580px;
  max-height: 92vh;
  overflow-y: auto;
  border-radius: 22px 22px 0 0;
  padding: 20px 18px 28px;
  box-shadow: var(--shadow);
}
@media (min-width: 640px) {
  .modal-sheet {
    border-radius: 20px;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}

/* Form Elements */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
}
.form-full {
  grid-column: 1 / -1;
}

.field-label {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 5px;
}

.field-input,
.field-select,
.field-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  outline: none;
  color-scheme: dark;
}
.field-input:focus,
.field-select:focus,
.field-textarea:focus {
  border-color: var(--primary);
}

.resta-preview {
  background: rgba(56, 189, 248, 0.1);
  border: 1px dashed rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
}

.conflict-banner {
  background: rgba(245, 158, 11, 0.16);
  border: 1px solid rgba(245, 158, 11, 0.5);
  color: #fde68a;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  display: none;
}
.conflict-banner.show {
  display: block;
}

.empty-state {
  text-align: center;
  padding: 42px 20px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
}

.toast {
  position: fixed;
  bottom: 85px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  border: 1px solid var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 90;
  display: none;
}
.toast.show {
  display: block;
}

/* Lock Screen / Auth Gate */
body:not(.authenticated) .app-shell,
body:not(.authenticated) .fab-new,
body:not(.authenticated) .modal-backdrop {
  display: none !important;
}

.auth-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top right, #1e1b4b 0%, var(--bg) 55%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

body.authenticated .auth-overlay {
  display: none !important;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: rgba(21, 31, 50, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px 22px;
  box-shadow: var(--shadow);
}

.auth-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.45);
  color: #fca5a5;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  margin-bottom: 14px;
  display: none;
}
.auth-error.show {
  display: block;
}