:root {
    /* School blue: #000088 ≈ oklch(22% 0.28 264) */
    --accent:         oklch(30% 0.26 264);
    --accent-hover:   oklch(23% 0.28 264);
    --accent-subtle:  oklch(95% 0.07 264);
    --accent-border:  oklch(78% 0.12 264);

    --bg:        oklch(96.5% 0.006 264);
    --surface:   oklch(99.5% 0.002 264);
    --surface-2: oklch(94% 0.009 264);

    --text:       oklch(16% 0.025 264);
    --text-2:     oklch(40% 0.018 264);
    --text-muted: oklch(60% 0.012 264);

    --border:        oklch(88% 0.012 264);
    --border-strong: oklch(79% 0.018 264);

    --nav-bg:     oklch(13% 0.22 264);
    --nav-border: oklch(20% 0.24 264);

    --success:        oklch(42% 0.16 145);
    --success-subtle: oklch(95% 0.06 145);
    --warning:        oklch(58% 0.14 80);
    --warning-subtle: oklch(97% 0.06 80);
    --danger:         oklch(47% 0.2 25);
    --danger-subtle:  oklch(97% 0.04 25);
}

* { font-family: "Space Grotesk", sans-serif; }
body { min-height: 100dvh; background: var(--bg); color: var(--text); }

/* ── Bootstrap overrides ── */
.btn-primary {
    background-color: var(--accent);
    border-color: var(--accent);
    color: oklch(99% 0.005 145);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    color: oklch(99% 0.005 145);
}
.btn-outline-primary {
    color: var(--accent);
    border-color: var(--accent);
}
.btn-outline-primary:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: oklch(99% 0.005 145);
}

/* ── Navbar ── */
.navbar {
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
}
.navbar .navbar-brand {
    font-weight: 700;
    letter-spacing: -0.4px;
    font-size: 0.95rem;
    color: oklch(88% 0.12 264);
}
.navbar .nav-link {
    font-size: 0.85rem;
    color: oklch(72% 0.04 264);
}
.navbar .nav-link-dim {
    color: oklch(60% 0.03 264);
}
.footer-text {
    font-size: 0.8rem;
}
.footer-link {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Subbar (secondary nav) ── */
.subbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.subbar .nav-link {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-2) !important;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    transition: background 0.12s, color 0.12s;
}
.subbar .nav-link:hover {
    background: var(--surface-2);
    color: var(--text) !important;
}
.subbar .nav-link.active {
    background: var(--accent-subtle);
    color: var(--accent) !important;
    font-weight: 600;
}

/* ── Footer ── */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* ── Dark panel (for login left-panel, replaces grainy-bg) ── */
.dark-panel {
    background: var(--nav-bg);
}

/* ── Cards ── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.card:hover {
    border-color: var(--border-strong);
    transition: border-color 0.15s;
}

/* ── Test cards ── */
.test-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    height: 100%;
    color: var(--text);
}
.test-card:hover {
    border-color: var(--accent-border);
    box-shadow: 0 2px 12px oklch(36% 0.19 145 / 0.08);
}
.test-card .test-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.test-card .test-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.test-card .test-meta span { display: flex; align-items: center; gap: 0.3rem; }

/* ── Section headings ── */
.section-heading {
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-heading .section-count {
    font-size: 0.72rem;
    font-weight: 600;
    background: var(--surface-2);
    color: var(--text-2);
    border-radius: 100px;
    padding: 0.1rem 0.55rem;
    border: 1px solid var(--border);
    text-transform: none;
    letter-spacing: 0;
}

/* ── Stat cards ── */
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
}
.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
}
.stat-card .stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

/* ── Content panel (replaces glass-panel) ── */
.content-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.content-panel .panel-title {
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

/* ── Data tables ── */
.dark-table-wrapper {
    background: var(--surface);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}
.dark-table-wrapper .table { margin-bottom: 0; }
.dark-table-wrapper .table thead th {
    background: var(--surface-2);
    border-bottom: 1px solid var(--border-strong);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 0.7rem 1rem;
}
.dark-table-wrapper .table tbody td {
    padding: 0.65rem 1rem;
    vertical-align: middle;
    color: var(--text);
    border-color: var(--border);
}
.dark-table-wrapper .table tbody tr:hover { background: var(--surface-2); }

/* DataTables control rows (buttons + search) inside dark-table-wrapper */
.dark-table-wrapper .dt-layout-row {
    padding: 0.6rem 1rem;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.dark-table-wrapper .dt-layout-row:last-child {
    border-bottom: none;
    border-top: 1px solid var(--border);
}
.dark-table-wrapper .dt-search { margin: 0; }
.dark-table-wrapper .dt-search input { font-size: 0.82rem; }
.dark-table-wrapper .dt-buttons { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.dark-table-wrapper .dt-button {
    font-size: 0.78rem !important;
    padding: 3px 10px !important;
    border-radius: 4px !important;
    border: 1px solid var(--border-strong) !important;
    background: var(--surface) !important;
    color: var(--text) !important;
}
.dark-table-wrapper .dt-button:hover {
    background: var(--accent-subtle) !important;
    border-color: var(--accent-border) !important;
}

/* ── Progress bar ── */
.pct-bar {
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    margin-top: 4px;
    overflow: hidden;
}
.pct-bar-fill {
    height: 100%;
    border-radius: 2px;
    background: var(--accent);
    transition: width 0.4s ease;
}

/* ── Status badges ── */
.badge-not-started { background: var(--surface-2); color: var(--text-muted); border: 1px solid var(--border); }
.badge-active      { background: var(--success-subtle); color: var(--success); border: 1px solid var(--accent-border); }
.badge-good        { background: var(--success-subtle); color: var(--success); }
.badge-warn        { background: var(--warning-subtle); color: var(--warning); }
.badge-danger      { background: var(--danger-subtle); color: var(--danger); }

/* ── Tool cards (admin/staff) ── */
.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.1rem 1.25rem;
    text-decoration: none !important;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: border-color 0.12s, box-shadow 0.12s;
}
.tool-card:hover {
    border-color: var(--accent-border);
    box-shadow: 0 2px 8px oklch(36% 0.19 145 / 0.08);
}
.tool-card .tool-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    background: var(--accent-subtle);
    color: var(--accent);
}
.tool-card .tool-text { flex: 1; }
.tool-card .tool-name { font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.1rem; }
.tool-card .tool-desc { font-size: 0.78rem; color: var(--text-muted); }

/* ── Page header ── */
.page-header {
    padding: 2rem 0 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}
.page-header h1 { color: var(--text); font-weight: 700; font-size: 1.5rem; margin-bottom: 0.15rem; }
.page-header .page-subtitle { color: var(--text-muted); font-size: 0.875rem; }
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: 1rem;
    transition: color 0.12s;
}
.back-link:hover { color: var(--text); }

/* ── Modal ── */
.modal-header {
    border-top-left-radius: 0 !important;
    border-top-right-radius: 0 !important;
}

/* ── Test index (home page list) ── */
.test-index { border-top: 1px solid var(--border); }
.test-row {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.1rem 0.75rem;
    text-decoration: none;
    color: inherit;
    border-bottom: 1px solid var(--border);
    border-radius: 4px;
    margin: 0 -0.75rem;
    transition: background 0.12s;
}
.test-row:hover { background: var(--accent-subtle); }
.test-row:hover .test-row-arrow { color: var(--accent); }
.test-row-body { flex: 1; min-width: 0; }
.test-row-name { font-size: 0.975rem; font-weight: 600; color: var(--text); margin-bottom: 0.2rem; }
.test-row-desc { font-size: 0.825rem; color: var(--text-muted); line-height: 1.5; }
.test-row-arrow { color: var(--border-strong); flex-shrink: 0; }

/* ── Mode sections (test overview) ── */
.mode-section { padding: 1.5rem 0; border-top: 1px solid var(--border); }
.mode-heading { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 0.35rem; }
.mode-desc { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.55; }

/* ── Mock list ── */
.mock-list { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.mock-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 1rem;
    text-decoration: none;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    transition: background 0.1s;
}
.mock-row:last-child { border-bottom: none; }
.mock-row:hover:not(.mock-row--disabled) { background: var(--surface-2); color: var(--text); }
.mock-row--disabled { color: var(--text-muted); pointer-events: none; }
.mock-row-name { font-weight: 500; }

/* ── Inline stat row (replaces stat-card grid on student pages) ── */
.stat-row {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.4rem 1.25rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}
.stat-item { font-size: 0.875rem; color: var(--text-2); }
.stat-item strong { font-size: 1.3rem; font-weight: 700; color: var(--text); margin-right: 0.15rem; }
.stat-sep { color: var(--border-strong); font-size: 0.875rem; align-self: center; }