/* ============================================
   CBT MODULE - Nigerian School Edition
   ============================================ */

:root {
    --cbt-primary: #1a73e8;
    --cbt-dark: #1a1a2e;
    --cbt-success: #10b981;
    --cbt-danger: #ef4444;
    --cbt-warning: #f59e0b;
    --cbt-info: #3b82f6;
    --cbt-bg: #f0f2f5;
    --cbt-white: #ffffff;
    --cbt-border: #e2e8f0;
    --cbt-text: #1e293b;
    --cbt-muted: #64748b;
}

* { box-sizing: border-box; }
body { font-family: 'Segoe UI', Arial, sans-serif; background: var(--cbt-bg); color: var(--cbt-text); }

/* ============ NAVBAR ============ */
.cbt-navbar {
    background: var(--cbt-dark);
    color: white;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.cbt-navbar a { color: white; text-decoration: none; }
.cbt-navbar-brand { font-weight: 700; font-size: 18px; }
.cbt-navbar-brand i { margin-right: 8px; color: var(--cbt-primary); }

/* ============ SIDEBAR ============ */
.cbt-layout { display: flex; min-height: calc(100vh - 48px); }
.cbt-sidebar {
    width: 230px;
    background: white;
    border-right: 1px solid var(--cbt-border);
    padding: 15px 0;
    flex-shrink: 0;
}
.cbt-sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: var(--cbt-text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}
.cbt-sidebar .nav-link:hover {
    background: #f8fafc;
    color: var(--cbt-primary);
    border-left-color: var(--cbt-primary);
}
.cbt-sidebar .nav-link.active {
    background: #eff6ff;
    color: var(--cbt-primary);
    font-weight: 600;
    border-left-color: var(--cbt-primary);
}
.cbt-sidebar .nav-link i { width: 22px; margin-right: 10px; text-align: center; }
.cbt-sidebar hr { margin: 10px 15px; border-color: var(--cbt-border); }
.cbt-sidebar-heading {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--cbt-muted);
    padding: 5px 20px;
    margin-top: 10px;
}

/* ============ MAIN CONTENT ============ */
.cbt-main {
    flex: 1;
    padding: 25px;
    overflow-x: auto;
}

/* ============ CARDS ============ */
.cbt-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--cbt-border);
    margin-bottom: 20px;
}
.cbt-card-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--cbt-border);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fafbfc;
    border-radius: 10px 10px 0 0;
}
.cbt-card-body { padding: 20px; }

/* ============ STAT CARDS ============ */
.cbt-stat-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.2s;
}
.cbt-stat-card:hover { transform: translateY(-2px); }
.cbt-stat-card .stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 10px;
}
.cbt-stat-card .stat-value { font-size: 28px; font-weight: 700; }
.cbt-stat-card .stat-label { font-size: 13px; color: var(--cbt-muted); }

/* ============ BUTTONS ============ */
.cbt-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}
.cbt-btn-primary { background: var(--cbt-primary); color: white; }
.cbt-btn-primary:hover { background: #1557b0; color: white; }
.cbt-btn-success { background: var(--cbt-success); color: white; }
.cbt-btn-success:hover { background: #059669; color: white; }
.cbt-btn-warning { background: var(--cbt-warning); color: #000; }
.cbt-btn-danger { background: var(--cbt-danger); color: white; }
.cbt-btn-outline { background: white; border: 1px solid var(--cbt-border); color: var(--cbt-text); }
.cbt-btn-outline:hover { background: #f8fafc; }
.cbt-btn-sm { padding: 5px 12px; font-size: 12px; }
.cbt-btn-group { display: flex; gap: 5px; flex-wrap: wrap; }

/* ============ TABLES ============ */
.cbt-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.cbt-table th {
    background: #f8fafc;
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--cbt-border);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--cbt-muted);
}
.cbt-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--cbt-border);
}
.cbt-table tr:hover { background: #f8fafc; }

/* ============ BADGES ============ */
.cbt-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}
.cbt-badge-success { background: #d1fae5; color: #065f46; }
.cbt-badge-danger { background: #fee2e2; color: #991b1b; }
.cbt-badge-warning { background: #fef3c7; color: #92400e; }
.cbt-badge-info { background: #dbeafe; color: #1e40af; }
.cbt-badge-neutral { background: #e2e8f0; color: #475569; }

/* ============ FORMS ============ */
.cbt-form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--cbt-border);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}
.cbt-form-control:focus { outline: none; border-color: var(--cbt-primary); box-shadow: 0 0 0 3px rgba(26,115,232,0.1); }
.cbt-form-label { font-weight: 500; font-size: 13px; margin-bottom: 4px; display: block; color: var(--cbt-text); }

/* ============ STUDENT LOGIN ============ */
.cbt-login-body {
    background: linear-gradient(135deg, var(--cbt-dark) 0%, #2d2d5e 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cbt-login-card {
    background: white;
    border-radius: 15px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    text-align: center;
}
.cbt-login-card h2 { margin-bottom: 5px; color: var(--cbt-dark); }
.cbt-login-card .school-name { color: var(--cbt-muted); font-size: 13px; margin-bottom: 25px; }
.cbt-pin-input {
    width: 100%;
    padding: 0px;
    font-size: 22px;
    text-align: center;
    letter-spacing: 8px;
    font-family: 'Courier New', monospace;
    border: 2px solid var(--cbt-border);
    border-radius: 8px;
    margin-bottom: 25px;
    text-transform: uppercase;
}
.cbt-pin-input:focus { outline: none; border-color: var(--cbt-primary); }

/* ============ EXAM INTERFACE ============ */
.cbt-exam-timer {
    background: var(--cbt-dark);
    color: white;
    padding: 10px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    font-size: 14px;
}
.cbt-exam-timer.warning { background: #f59e0b; color: #000; }
.cbt-exam-timer.danger { background: #ef4444; animation: cbt-pulse 1s infinite; }
@keyframes cbt-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.7; } }

.cbt-exam-layout { display: flex; min-height: calc(100vh - 48px); }
.cbt-question-area { flex: 1; padding: 30px; overflow-y: auto; }
.cbt-question-palette {
    width: 280px;
    background: white;
    border-left: 1px solid var(--cbt-border);
    padding: 20px;
    overflow-y: auto;
}

.cbt-option-btn {
    display: block;
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 10px;
    text-align: left;
    border: 2px solid var(--cbt-border);
    border-radius: 8px;
    background: white;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.2s;
}
.cbt-option-btn:hover { border-color: var(--cbt-primary); background: #eff6ff; }
.cbt-option-btn.selected { border-color: var(--cbt-primary); background: var(--cbt-primary); color: white; }

.cbt-q-btn {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    border: 1px solid var(--cbt-border);
    margin: 3px;
    font-size: 12px;
    cursor: pointer;
    background: #f8fafc;
    transition: all 0.2s;
}
.cbt-q-btn:hover { border-color: var(--cbt-primary); }
.cbt-q-btn.answered { background: var(--cbt-success); color: white; border-color: var(--cbt-success); }
.cbt-q-btn.flagged { background: var(--cbt-warning); color: white; }
.cbt-q-btn.current { border: 3px solid var(--cbt-primary); font-weight: bold; }
.cbt-q-btn.not-answered { background: #fee2e2; color: #991b1b; }

/* ============ RESULT PAGE ============ */
.cbt-result-card {
    max-width: 550px;
    margin: 40px auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
    overflow: hidden;
}
.cbt-result-header { background: var(--cbt-success); color: white; padding: 25px; }
.cbt-result-header.failed { background: var(--cbt-danger); }
.cbt-result-body { padding: 30px; }
.cbt-result-score { font-size: 60px; font-weight: 700; }
.cbt-result-grade { font-size: 24px; font-weight: 600; margin-top: 5px; }

/* ============ SELECTED ROW ============ */
.cbt-table tbody tr.selected-row {
    background: #1a73e8 !important;
    color: white !important;
}
.cbt-table tbody tr.selected-row td {
    border-bottom-color: #1557b0 !important;
    color: white !important;
}
.cbt-table tbody tr.selected-row .cbt-badge {
    border: 1px solid rgba(255,255,255,0.5) !important;
}
/*.q-btn{*/
    
    
/*}*/
/* ============ PRINT ============ */
@media print {
    .cbt-sidebar, .cbt-navbar, button, .cbt-btn { display: none !important; }
    .cbt-main { padding: 0; }
    body { background: white; }
}

/* ============ MOBILE ============ */
@media (max-width: 768px) {
    .cbt-sidebar { display: none; }
    .cbt-layout { flex-direction: column; }
    .cbt-main { padding: 15px; }
    .cbt-exam-layout { flex-direction: column; }
    .cbt-question-palette { width: 100%; border-left: none; border-top: 1px solid var(--cbt-border); }
    .cbt-stat-card .stat-value { font-size: 22px; }
    .cbt-table { font-size: 11px; }
    .cbt-login-card { margin: 20px; padding: 25px; }
}


/* ============ ROW HOVER ============ */
.cbt-table tbody tr:hover {
    background: #dbeafe !important;
    cursor: pointer;
}

/* ============ START EXAM BUTTON ============ */
.cbt-start-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-align: center;
}

/* Bigger palette legend */
.cbt-q-btn {
    width: 28px;
    height: 28px;
    font-size: 11px;
    font-weight: bold;
}