:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --border: #e5e7eb;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    width: min(960px, 92%);
    margin: 0 auto;
}

.site-header,
.site-footer {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.site-footer {
    border-bottom: none;
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    padding: 1rem 0;
    color: var(--muted);
}

.site-header .container,
.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-header {
    padding: 1rem 0;
}

.brand {
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.site-nav a,
.site-nav button {
    margin-left: 0.75rem;
}

a {
    color: var(--primary);
}

main {
    padding: 2rem 0 3rem;
}

.auth-card,
.dashboard-card,
.error-card {
    max-width: 480px;
    margin: 0 auto;
    background: var(--surface);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.dashboard-card,
.error-card {
    max-width: 640px;
}

h1 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--muted);
    margin-top: 0;
}

label {
    display: block;
    margin: 1rem 0 0.35rem;
    font-weight: 600;
}

input {
    width: 100%;
    padding: 0.75rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.btn {
    display: inline-block;
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: #e5e7eb;
    color: var(--text);
}

.alert {
    padding: 0.85rem 1rem;
    border-radius: 8px;
    margin: 1rem 0;
}

.alert-error {
    background: #fee2e2;
    color: var(--danger);
}

.hidden {
    display: none;
}

.auth-switch {
    margin-top: 1.5rem;
    color: var(--muted);
}

.profile-list {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 0.75rem 1rem;
    margin: 1.5rem 0 0;
}

.profile-list dt {
    font-weight: 700;
}

.profile-list dd {
    margin: 0;
}

.loading {
    color: var(--muted);
    margin-top: 1rem;
}

.field-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.panel-wide { max-width: 1100px; }
.panel-nav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; }
.tab-btn { padding: 0.5rem 1rem; border: 1px solid var(--border); background: var(--surface); border-radius: 6px; cursor: pointer; }
.tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tab-panel { margin-top: 1rem; }
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.45); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal-content { background: var(--surface); padding: 1.5rem; border-radius: 8px; max-width: 520px; width: 92%; max-height: 90vh; overflow-y: auto; }
.booking-page { max-width: 720px; margin: 0 auto; }
.booking-form { background: var(--surface); padding: 1.5rem; border-radius: 8px; box-shadow: var(--shadow); }
.form-grid label { display: block; margin-bottom: 0.75rem; }
.form-grid input, .form-grid select, .form-grid textarea { width: 100%; margin-top: 0.25rem; padding: 0.5rem; border: 1px solid var(--border); border-radius: 4px; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.legal-content h2 { margin-top: 1.5rem; }
.cal-day { margin-bottom: 1rem; background: var(--surface); padding: 1rem; border-radius: 8px; }
.cal-btn { width: 100%; text-align: left; padding: 0.5rem; border: 1px solid var(--border); background: #fff; border-radius: 4px; margin-bottom: 0.25rem; cursor: pointer; }
.org-list { list-style: none; padding: 0; }
.org-list li { margin: 0.5rem 0; }
.announcement { background: var(--surface); padding: 0.75rem; margin: 0.5rem 0; border-radius: 6px; border: 1px solid var(--border); }
.org-list { list-style: none; padding: 0; }
.org-list li { margin: 0.5rem 0; }

/* Panel */
.panel-header { margin-bottom: 1rem; }
.panel-toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 1rem; }
.panel-toolbar select { padding: 0.4rem 0.6rem; border: 1px solid var(--border); border-radius: 4px; }
.modal-wide { max-width: 640px; }
.modal-actions { display: flex; gap: 0.5rem; margin-top: 1rem; }
.drawer-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; }
.btn-sm { padding: 0.35rem 0.6rem; font-size: 0.875rem; margin-top: 0; }
.form-inline { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.form-inline input { flex: 1; min-width: 120px; }

/* Calendar grid */
.cal-toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 1rem; }
.cal-title { font-weight: 700; margin: 0 0.5rem; }
.cal-grid { background: var(--surface); border-radius: 8px; padding: 0.75rem; border: 1px solid var(--border); }
.cal-month-head, .cal-month-body { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-month-head span { text-align: center; font-weight: 600; font-size: 0.85rem; color: var(--muted); padding: 0.25rem; }
.cal-cell { min-height: 90px; border: 1px solid var(--border); border-radius: 4px; padding: 4px; background: #fafafa; }
.cal-cell.cal-empty { background: transparent; border-color: transparent; }
.cal-cell.cal-today { border-color: var(--primary); background: #eff6ff; }
.cal-date { font-size: 0.8rem; font-weight: 600; margin-bottom: 4px; }
.cal-chip { display: block; width: 100%; text-align: left; font-size: 0.75rem; padding: 2px 4px; margin-bottom: 2px; border: none; border-radius: 3px; background: var(--primary); color: #fff; cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cal-chip.cal-event { background: #7c3aed; }
.cal-week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-week-col { min-height: 120px; border: 1px solid var(--border); border-radius: 4px; padding: 4px; }
.cal-remind-badge { color: #b45309; font-weight: 600; }

/* Tables & lists */
.data-table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.data-table th, .data-table td { border: 1px solid var(--border); padding: 0.5rem; text-align: left; }
.data-table th { background: #f9fafb; }
.list-row { padding: 0.75rem; border: 1px solid var(--border); border-radius: 6px; margin: 0.5rem 0; background: var(--surface); }
.split-panel { display: grid; grid-template-columns: 280px 1fr; gap: 1rem; min-height: 300px; }
.split-left { border: 1px solid var(--border); border-radius: 6px; overflow-y: auto; max-height: 400px; }
.split-right { border: 1px solid var(--border); border-radius: 6px; padding: 1rem; }
.client-row { display: block; width: 100%; text-align: left; padding: 0.6rem; border: none; border-bottom: 1px solid var(--border); background: #fff; cursor: pointer; }
.client-row:hover { background: #f3f4f6; }
.hours-day { border: 1px solid var(--border); border-radius: 6px; padding: 0.75rem; margin: 0.5rem 0; }
.brand-preview { padding: 1rem; border: 2px dashed var(--border); border-radius: 8px; margin: 1rem 0; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; }
.links-admin { margin-top: 2rem; }

/* Public booking */
.booking-logo { max-height: 64px; max-width: 200px; margin-bottom: 0.75rem; }
.booking-header { text-align: center; margin-bottom: 1.5rem; }
.booking-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.btab-panel { background: var(--surface); padding: 1.5rem; border-radius: 8px; box-shadow: var(--shadow); }
.booking-user-banner { background: #eff6ff; padding: 0.5rem 0.75rem; border-radius: 6px; font-size: 0.9rem; }
.link-list { list-style: none; padding: 0; }
.link-list li { margin: 0.5rem 0; }

/* Legal */
.kvkk-draft-banner { background: #fef3c7; border: 1px solid #fbbf24; padding: 0.75rem 1rem; border-radius: 6px; margin-bottom: 1rem; }
.legal-nav { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.legal-nav a { font-weight: 600; }

@media (max-width: 768px) {
    .split-panel { grid-template-columns: 1fr; }
    .cal-cell { min-height: 60px; }
}