:root {
  --color-bg: #f5f6fa;
  --color-surface: #ffffff;
  --color-primary: #2952e3;
  --color-primary-dark: #1e3fb8;
  --color-text: #1a1d29;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

h1, h2, h3 { margin-top: 0; }

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.header .brand { font-weight: 700; font-size: 1.1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-primary);
  color: white;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--color-primary-dark); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.secondary { background: var(--color-border); color: var(--color-text); }
.btn.secondary:hover { background: #d1d5db; }
.btn.danger { background: var(--color-danger); }
.btn.danger:hover { background: #b91c1c; }
.btn.small { padding: 6px 12px; font-size: 0.85rem; }

.form-group { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; }
input[type="text"], input[type="email"], input[type="tel"], input[type="time"], input[type="password"], input[type="date"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: white;
  color: var(--color-text);
}
textarea { resize: vertical; min-height: 80px; }
.hint { color: var(--color-muted); font-size: 0.82rem; margin-top: 4px; }
.error-text { color: var(--color-danger); font-size: 0.88rem; margin-top: 6px; }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.stat {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  text-align: left;
}
.stat .value { font-size: 1.8rem; font-weight: 700; }
.stat .label { color: var(--color-muted); font-size: 0.85rem; margin-top: 4px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--color-border); font-size: 0.92rem; }
th { color: var(--color-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.02em; }
tr:hover td { background: #fafbfe; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge.confirmed { background: #dbeafe; color: #1e40af; }
.badge.completed { background: #dcfce7; color: #166534; }
.badge.cancelled { background: #fee2e2; color: #991b1b; }
.badge.no_show { background: #fef3c7; color: #92400e; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.inactive { background: #f3f4f6; color: #4b5563; }
.badge.pending { background: #fef3c7; color: #92400e; }
.badge.sent { background: #dcfce7; color: #166534; }
.badge.failed { background: #fee2e2; color: #991b1b; }
.badge.skipped { background: #f3f4f6; color: #4b5563; }

.day-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 8px; }
.day-tab {
  flex: 0 0 auto;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: white;
  cursor: pointer;
  text-align: center;
  min-width: 84px;
}
.day-tab.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.day-tab .dow { font-size: 0.75rem; text-transform: uppercase; opacity: 0.8; }
.day-tab .dom { font-size: 1.1rem; font-weight: 700; }

.slot-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.slot-btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: white;
  cursor: pointer;
  font-weight: 600;
}
.slot-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.slot-btn.selected { background: var(--color-primary); border-color: var(--color-primary); color: white; }

.empty-state { text-align: center; padding: 40px 16px; color: var(--color-muted); }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  z-index: 100;
}
.toast.error { background: var(--color-danger); }
.toast.success { background: var(--color-success); }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 200; padding: 16px;
}
.modal {
  background: white; border-radius: var(--radius); padding: 24px;
  max-width: 480px; width: 100%; max-height: 90vh; overflow-y: auto;
}

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--color-border); margin-bottom: 20px; flex-wrap: wrap; }
.tab-btn {
  padding: 10px 16px; border: none; background: none; cursor: pointer;
  font-weight: 600; color: var(--color-muted); border-bottom: 2px solid transparent;
}
.tab-btn.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.search-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.search-bar input { flex: 1; min-width: 200px; }

a { color: var(--color-primary); }
.muted { color: var(--color-muted); }
.text-center { text-align: center; }
.spinner { text-align: center; padding: 40px; color: var(--color-muted); }