/* Design tokens per .claude/rules.md — kept in sync with ExamScheduler's palette */
:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --dark: #1f2937;
    --medium: #374151;
    --page-bg: #f5f7fa;
    --card-bg: #ffffff;
    --cell-bg: #f9f9f9;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --success: #4ade80;
    --warning: #f87171;
    --info: #3b82f6;
    --caution: #fbbf24;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--page-bg);
    color: var(--text-primary);
}

.hidden { display: none !important; }
.muted { color: var(--text-secondary); font-size: 0.85rem; }

/* Auth overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 50%, #1a365d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.overlay-card {
    max-width: 420px;
    width: 90%;
    text-align: center;
    color: white;
}

#clerkAuthMount { display: flex; justify-content: center; }

.overlay-header i { font-size: 2.5rem; color: var(--primary); margin-bottom: 12px; }
.overlay-header h1 { font-size: 1.75rem; font-weight: 600; margin: 0 0 8px; }
.overlay-header p { color: #cbd5e0; margin: 0 0 24px; font-size: 0.9rem; }

.stacked-form { display: flex; flex-direction: column; gap: 12px; }
.stacked-form input {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid #4a5568;
    background: #2d3748;
    color: white;
    font-size: 0.9rem;
}
.field-error { color: var(--warning); font-size: 0.85rem; min-height: 1.2em; text-align: left; }

/* Page shell */
.topbar {
    background: var(--dark);
    color: white;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 { font-size: 1.25rem; font-weight: 600; margin: 0; display: flex; align-items: center; gap: 8px; }
.topbar-right { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: #cbd5e0; }

.btn-icon {
    background: transparent;
    border: 1px solid #4a5568;
    color: white;
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
}
.btn-icon:hover { background: #374151; }

.content {
    max-width: 900px;
    margin: 24px auto;
    padding: 0 16px 48px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.banner {
    max-width: 900px;
    margin: 16px auto 0;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
}
.banner-error { background: #fef2f2; color: #b91c1c; border-left: 4px solid var(--warning); }

.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 20px 24px;
}
.card h2 { font-size: 1.1rem; font-weight: 600; margin: 0 0 12px; color: var(--dark); }

.field-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field-row label { font-size: 0.85rem; font-weight: 600; color: var(--medium); }
.field-row select,
.field-row input[type="text"],
.field-row input[type="file"] {
    padding: 8px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }
.btn-primary:not(:disabled):hover { background: linear-gradient(135deg, var(--primary-hover), var(--primary-hover)); }

.mapping-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 20px;
}
.mapping-field { display: flex; flex-direction: column; gap: 4px; }
.mapping-field label { font-size: 0.8rem; color: var(--medium); font-weight: 600; }
.mapping-field label .required { color: var(--warning); }
.mapping-field select {
    padding: 7px 8px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.85rem;
}

.table-scroll { overflow-x: auto; max-height: 420px; overflow-y: auto; margin-top: 8px; }

.preview-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.8rem;
}
.preview-table th, .preview-table td {
    border: 1px solid #e5e7eb;
    padding: 6px 10px;
    text-align: left;
    white-space: nowrap;
}
.preview-table th {
    background: var(--dark);
    color: white;
    position: sticky;
    top: 0;
}
.preview-table td { background: var(--cell-bg); }

.preview-row-included td { background: #f0fdf4; }
.preview-row-warning td { background: #fffbeb; }
.preview-row-skipped td { background: #fef2f2; color: var(--text-tertiary); }

.preview-status {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.preview-row-included .preview-status { color: #16a34a; }
.preview-row-warning .preview-status { color: #d97706; }
.preview-row-skipped .preview-status { color: #dc2626; }

.preview-reason {
    display: block;
    font-size: 0.72rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}