:root {
    --exam-bg: #f6f8fb;
    --exam-card: #ffffff;
    --exam-border: #e5e7eb;
    --exam-accent: #2563eb;
    --exam-muted: #6b7280;
    --exam-success: #16a34a;
    --exam-error: #dc2626;
}

body {
    background: var(--exam-bg);
}

.exam-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.exam-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--exam-border);
}

.exam-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.exam-logo {
    width: 36px;
    height: 36px;
}

.exam-title {
    font-size: 20px;
    font-weight: 700;
}

.exam-subtitle {
    font-size: 12px;
    color: var(--exam-muted);
}

.exam-actions {
    display: flex;
    gap: 10px;
}

.exam-link {
    text-decoration: none;
    font-size: 12px;
    color: var(--exam-accent);
    border: 1px solid var(--exam-border);
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
}

.exam-main {
    display: grid;
    gap: 18px;
    padding: 20px 24px 40px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.exam-card {
    background: var(--exam-card);
    border: 1px solid var(--exam-border);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.exam-card h2 {
    margin-top: 0;
}

.exam-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.exam-form.row {
    grid-template-columns: 1fr;
}

.exam-form label {
    display: flex;
    flex-direction: column;
    font-size: 12px;
    gap: 6px;
    color: var(--exam-muted);
}

.exam-form select,
.exam-form input {
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--exam-border);
    font-size: 14px;
}

.exam-buttons {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.exam-btn {
    padding: 10px 16px;
    border-radius: 999px;
    border: 1px solid var(--exam-border);
    font-weight: 600;
    cursor: pointer;
}

.exam-btn.primary {
    background: linear-gradient(135deg, #2563eb, #38bdf8);
    color: #fff;
    border: none;
}

.exam-btn.ghost {
    background: #fff;
    color: var(--exam-accent);
}

.exam-note {
    font-size: 12px;
    color: var(--exam-muted);
    margin-top: 12px;
}

.exam-status {
    font-size: 12px;
    color: var(--exam-muted);
}

.exam-status.ready {
    color: var(--exam-accent);
}

.exam-status.error {
    color: var(--exam-error);
}

.exam-status.busy {
    color: #f59e0b;
}

.questions-container {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 12px;
}

.questions-container.empty {
    color: var(--exam-muted);
}

.question-card {
    border: 1px solid var(--exam-border);
    border-radius: 12px;
    padding: 12px;
    display: grid;
    gap: 8px;
}

.question-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--exam-muted);
}

.question-text {
    font-size: 15px;
    font-weight: 600;
}

.options-list {
    display: grid;
    gap: 6px;
}

.option-item {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    font-size: 14px;
}

.result-summary {
    font-weight: 700;
    margin-top: 8px;
}

.result-details {
    display: grid;
    gap: 12px;
    margin-top: 12px;
}

.result-item {
    border-radius: 12px;
    padding: 12px;
    border: 1px solid var(--exam-border);
}

.result-item.ok {
    border-color: rgba(22, 163, 74, 0.3);
    background: rgba(22, 163, 74, 0.08);
}

.result-item.bad {
    border-color: rgba(220, 38, 38, 0.3);
    background: rgba(220, 38, 38, 0.08);
}

.result-title {
    font-weight: 700;
    margin-bottom: 6px;
}

.result-question {
    font-size: 14px;
    margin-bottom: 6px;
}

.result-line {
    font-size: 12px;
    color: var(--exam-muted);
    margin-bottom: 6px;
}

.result-explain {
    font-size: 13px;
}

.exam-error {
    color: var(--exam-error);
}

@media (max-width: 900px) {
    .exam-main {
        grid-template-columns: 1fr;
        padding: 16px;
    }
    .exam-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .exam-actions {
        flex-wrap: wrap;
    }
}