:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1a1d23;
    --muted: #6b7280;
    --border: #e2e5ea;
    --primary: #006195;
    --primary-hover: #004b74;
    --primary-text: #ffffff;
    --danger: #c0392b;
    --danger-bg: #fdecea;
    --warning: #b8860b;
    --warning-bg: #fff8e6;
    --success: #1e8e5a;
    --code-bg: #f1f3f6;
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
}

.boot-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: 1rem;
    color: var(--muted);
}

.boot-loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#blazor-error-ui {
    background: var(--danger-bg);
    border-top: 1px solid var(--danger);
    color: var(--danger);
    display: none;
    left: 0;
    padding: 0.85rem 1.25rem;
    position: fixed;
    width: 100%;
    bottom: 0;
    box-sizing: border-box;
    z-index: 1000;
}

#blazor-error-ui .reload {
    color: var(--danger);
    font-weight: 600;
    margin-left: 0.5rem;
}

.assessment-shell {
    max-width: 720px;
    margin: 0 auto;
    padding: 3rem 1.25rem 4rem;
}

.assessment-screen {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.25rem;
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.04), 0 1px 2px rgba(16, 24, 40, 0.06);
}

.assessment-screen h1 {
    margin-top: 0;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.assessment-screen p {
    line-height: 1.65;
    color: var(--text);
}

.assessment-error-title {
    color: var(--danger);
}

.assessment-notes {
    color: var(--text);
    line-height: 1.75;
    padding-left: 1.25rem;
    margin: 1.25rem 0;
}

.assessment-notes li {
    margin-bottom: 0.6rem;
}

.assessment-field {
    display: block;
    margin: 1.75rem 0;
    font-weight: 600;
}

.assessment-field input {
    display: block;
    width: 100%;
    margin-top: 0.6rem;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.assessment-field input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 97, 149, 0.12);
}

.assessment-button {
    padding: 0.75rem 1.6rem;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: var(--primary-text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease;
}

.assessment-button:hover:not(:disabled) {
    background: var(--primary-hover);
}

.assessment-button:active:not(:disabled) {
    transform: translateY(1px);
}

.assessment-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.assessment-button-secondary {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    margin-right: 0.6rem;
}

.assessment-button-secondary:hover:not(:disabled) {
    background: var(--bg);
    color: var(--text);
}

.assessment-camera-preview {
    position: fixed;
    top: -1px;
    left: -1px;
    width: 1px;
    height: 1px;
    opacity: 0.01;
    pointer-events: none;
}

.assessment-camera-preview-visible {
    position: static;
    display: block;
    width: 100%;
    max-width: 420px;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    opacity: 1;
    border-radius: 10px;
    background: #000;
    margin: 1.25rem 0 0.5rem;
    pointer-events: auto;
}

.assessment-camera-error {
    color: var(--danger);
    background: var(--danger-bg);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.assessment-warning-banner {
    max-width: 720px;
    margin: 0 auto 1rem;
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid #f0d999;
    border-radius: 10px;
    padding: 0.85rem 1.1rem;
    font-weight: 600;
    font-size: 0.95rem;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.assessment-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.assessment-countdown {
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text);
}

.assessment-countdown.assessment-countdown-warning {
    color: var(--danger);
}

.assessment-domain {
    display: inline-block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.6rem;
    background: rgba(0, 97, 149, 0.08);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
}

.assessment-question-text {
    font-size: 1.12rem;
    line-height: 1.65;
    margin-bottom: 1rem;
}

.assessment-question-code {
    background: var(--code-bg);
    border-radius: 8px;
    padding: 1rem 1.1rem;
    overflow-x: auto;
    font-family: "Cascadia Code", Consolas, "SF Mono", monospace;
    font-size: 0.88rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.assessment-answer {
    width: 100%;
    padding: 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.assessment-answer:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 97, 149, 0.12);
}

.assessment-answer-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.85rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.assessment-char-counter {
    color: var(--muted);
    font-size: 0.85rem;
}

.assessment-char-counter-over {
    color: var(--danger);
    font-weight: 600;
}

@media (max-width: 480px) {
    .assessment-shell {
        padding: 1.5rem 0.85rem 3rem;
    }

    .assessment-screen {
        padding: 1.5rem;
    }

    .assessment-answer-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .assessment-answer-footer > div {
        display: flex;
        gap: 0.5rem;
    }

    .assessment-answer-footer .assessment-button {
        flex: 1;
    }
}