/* ── SEP Advanced Exam — Frontend Styles ──────────────────────────────────── */

:root {
    --sep-primary:    #4f46e5;
    --sep-primary-dk: #3730a3;
    --sep-success:    #16a34a;
    --sep-danger:     #dc2626;
    --sep-warning:    #d97706;
    --sep-gray-50:    #f9fafb;
    --sep-gray-100:   #f3f4f6;
    --sep-gray-200:   #e5e7eb;
    --sep-gray-400:   #9ca3af;
    --sep-gray-700:   #374151;
    --sep-gray-900:   #111827;
    --sep-radius:     12px;
    --sep-shadow:     0 4px 24px rgba(0,0,0,.10);
    --sep-font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.sep-wrap {
    max-width: 720px;
    margin: 32px auto;
    font-family: var(--sep-font);
    color: var(--sep-gray-900);
}

/* ── Start Screen ────────────────────────────────────────────────────────── */
.sep-start-screen { text-align: center; }

.sep-start-card {
    background: #fff;
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
    padding: 48px 40px;
}

.sep-start-icon { font-size: 56px; margin-bottom: 16px; }

.sep-start-title {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--sep-gray-900);
}

.sep-start-meta {
    color: var(--sep-gray-400);
    margin: 0 0 24px;
}

.sep-start-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 24px 0;
    padding: 20px;
    background: var(--sep-gray-50);
    border-radius: 8px;
}

.sep-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.sep-stat-val   { font-size: 28px; font-weight: 700; color: var(--sep-primary); }
.sep-stat-label { font-size: 12px; color: var(--sep-gray-400); text-transform: uppercase; letter-spacing: .05em; }

.sep-rules {
    list-style: none;
    padding: 0;
    margin: 0 0 32px;
    text-align: left;
    display: inline-block;
}

.sep-rules li {
    padding: 6px 0 6px 24px;
    position: relative;
    color: var(--sep-gray-700);
    font-size: 14px;
}

.sep-rules li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--sep-success);
    font-weight: 700;
}

/* ── Timer bar ───────────────────────────────────────────────────────────── */
.sep-timer-bar {
    background: #fff;
    border-radius: var(--sep-radius);
    padding: 14px 20px 12px;
    box-shadow: var(--sep-shadow);
    margin-bottom: 16px;
}

.sep-timer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.sep-timer-label { font-size: 13px; color: var(--sep-gray-400); }

.sep-timer-display {
    font-size: 22px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--sep-primary);
    transition: color .3s;
}

.sep-timer-display.sep-timer-warning { color: var(--sep-warning); }
.sep-timer-display.sep-timer-danger  { color: var(--sep-danger);  animation: sep-pulse 1s infinite; }

@keyframes sep-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}

.sep-timer-progress-wrap {
    height: 6px;
    background: var(--sep-gray-200);
    border-radius: 99px;
    overflow: hidden;
}

.sep-timer-progress {
    height: 100%;
    background: var(--sep-primary);
    border-radius: 99px;
    transition: width 1s linear, background .3s;
}

.sep-timer-progress.sep-timer-progress-warning { background: var(--sep-warning); }
.sep-timer-progress.sep-timer-progress-danger  { background: var(--sep-danger);  }

/* ── Question progress bar ───────────────────────────────────────────────── */
.sep-progress-wrap { margin-bottom: 16px; }

.sep-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--sep-gray-400);
    margin-bottom: 6px;
}

.sep-progress-bar {
    height: 6px;
    background: var(--sep-gray-200);
    border-radius: 99px;
    overflow: hidden;
}

.sep-progress-fill {
    height: 100%;
    background: var(--sep-primary);
    border-radius: 99px;
    transition: width .4s ease;
}

/* ── Question card ───────────────────────────────────────────────────────── */
.sep-question-card {
    background: #fff;
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
    padding: 32px;
    margin-bottom: 16px;
}

.sep-question-text {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    margin: 0 0 24px;
    color: var(--sep-gray-900);
}

.sep-options { display: flex; flex-direction: column; gap: 12px; }

.sep-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: 2px solid var(--sep-gray-200);
    border-radius: 8px;
    cursor: pointer;
    transition: border-color .2s, background .2s;
}

.sep-option:hover { border-color: var(--sep-primary); background: #f0efff; }

.sep-option input[type="radio"] { display: none; }

.sep-option input[type="radio"]:checked ~ .sep-option-label { background: var(--sep-primary); color: #fff; }
.sep-option:has(input:checked) { border-color: var(--sep-primary); background: #eef2ff; }

.sep-option-label {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sep-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
    transition: background .2s, color .2s;
}

.sep-option-text { font-size: 15px; color: var(--sep-gray-700); }

.sep-actions { margin-top: 24px; text-align: right; }

/* ── Score tracker ───────────────────────────────────────────────────────── */
.sep-score-tracker {
    text-align: right;
    font-size: 13px;
    color: var(--sep-gray-400);
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.sep-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s, transform .1s;
    text-decoration: none;
}

.sep-btn:active { transform: scale(.97); }

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

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

.sep-btn-lg { padding: 16px 40px; font-size: 17px; }

/* ── Result screen ───────────────────────────────────────────────────────── */
.sep-result-wrap {}

.sep-result-header {
    border-radius: var(--sep-radius) var(--sep-radius) 0 0;
    padding: 32px;
    text-align: center;
    color: #fff;
}

.sep-passed { background: linear-gradient(135deg, #16a34a, #15803d); }
.sep-failed { background: linear-gradient(135deg, #dc2626, #b91c1c); }

.sep-result-header h2 { margin: 8px 0 0; font-size: 24px; }
.sep-result-icon { font-size: 52px; }

.sep-result-stats {
    display: flex;
    gap: 0;
    background: #fff;
    box-shadow: var(--sep-shadow);
}

.sep-rstat {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 16px;
    border-right: 1px solid var(--sep-gray-100);
}

.sep-rstat:last-child { border-right: none; }

.sep-rstat-val   { font-size: 24px; font-weight: 700; }
.sep-rstat-label { font-size: 12px; color: var(--sep-gray-400); text-transform: uppercase; margin-top: 4px; }

.sep-c-green { color: var(--sep-success); }
.sep-c-red   { color: var(--sep-danger); }

/* Score ring */
.sep-score-ring-wrap {
    display: flex;
    justify-content: center;
    padding: 32px;
    background: var(--sep-gray-50);
}

.sep-score-ring { width: 140px; height: 140px; transform: rotate(-90deg); }

.sep-ring-bg   { fill: none; stroke: var(--sep-gray-200); stroke-width: 10; }
.sep-ring-fill { fill: none; stroke-width: 10; stroke-linecap: round; transition: stroke-dasharray .8s ease; }
.sep-ring-pass { stroke: var(--sep-success); }
.sep-ring-fail { stroke: var(--sep-danger); }

.sep-ring-text {
    fill: var(--sep-gray-900);
    font-size: 22px;
    font-weight: 700;
    text-anchor: middle;
    transform: rotate(90deg) translate(0, -120px);
}

/* Review */
.sep-review {
    background: #fff;
    box-shadow: var(--sep-shadow);
    padding: 24px 32px;
}

.sep-review h3 { margin-top: 0; }

.sep-review-list { display: flex; flex-direction: column; gap: 16px; }

.sep-review-item {
    padding: 16px;
    background: var(--sep-gray-50);
    border-radius: 8px;
    border-left: 4px solid var(--sep-danger);
}

.sep-review-q       { margin: 0 0 8px; font-weight: 600; }
.sep-review-your    { margin: 0 0 4px; font-size: 14px; }
.sep-review-correct { margin: 0; font-size: 14px; }
.sep-wrong   { color: var(--sep-danger);  font-weight: 600; }
.sep-correct { color: var(--sep-success); font-weight: 600; }

.sep-perfect {
    text-align: center;
    font-size: 18px;
    padding: 24px;
    background: #fff;
    box-shadow: var(--sep-shadow);
}

.sep-result-actions {
    text-align: center;
    padding: 24px;
    background: #fff;
    box-shadow: var(--sep-shadow);
    border-radius: 0 0 var(--sep-radius) var(--sep-radius);
}

.sep-notice { color: var(--sep-gray-400); font-style: italic; }

/* ── Leaderboard ─────────────────────────────────────────────────────────── */
.sep-lb-wrap {}

.sep-lb-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
}

.sep-lb-summary {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.sep-lb-stat {
    flex: 1;
    min-width: 120px;
    background: #fff;
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
    padding: 20px;
    text-align: center;
}

.sep-lb-best { border-top: 3px solid var(--sep-primary); }
.sep-lb-stat-val   { display: block; font-size: 24px; font-weight: 700; color: var(--sep-primary); }
.sep-lb-stat-label { display: block; font-size: 12px; color: var(--sep-gray-400); margin-top: 4px; text-transform: uppercase; }

.sep-lb-table-wrap { overflow-x: auto; }

.sep-lb-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: var(--sep-radius);
    box-shadow: var(--sep-shadow);
    overflow: hidden;
}

.sep-lb-table th,
.sep-lb-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--sep-gray-100);
    font-size: 14px;
}

.sep-lb-table th { background: var(--sep-gray-50); font-weight: 600; color: var(--sep-gray-700); }
.sep-lb-table tr:last-child td { border-bottom: none; }
.sep-lb-best-row { background: #fffbeb !important; }

.sep-lb-bar-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 100px;
}

.sep-lb-bar {
    height: 6px;
    border-radius: 99px;
    min-width: 4px;
    max-width: 80px;
    flex-shrink: 0;
}

.sep-lb-bar-pass { background: var(--sep-success); }
.sep-lb-bar-fail { background: var(--sep-danger); }

.sep-pass-badge, .sep-fail-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .05em;
}

.sep-pass-badge { background: #dcfce7; color: #166534; }
.sep-fail-badge { background: #fee2e2; color: #991b1b; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .sep-start-card        { padding: 32px 20px; }
    .sep-question-card     { padding: 20px; }
    .sep-start-stats       { gap: 16px; }
    .sep-result-stats      { flex-wrap: wrap; }
    .sep-rstat             { min-width: 45%; }
    .sep-option            { padding: 12px 14px; }
    .sep-question-text     { font-size: 16px; }
    .sep-lb-summary        { gap: 12px; }
}