:root {
    --app-primary: #3657ff;
    --app-primary-dark: #263bb4;
    --app-bg: #f5f7fb;
    --app-text: #172033;
    --app-muted: #697386;
    --app-success: #18a058;
    --app-danger: #d93025;
}

body {
    background: var(--app-bg);
    color: var(--app-text);
}

.auth-main {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(54,87,255,.18), transparent 30%),
        radial-gradient(circle at bottom right, rgba(24,160,88,.12), transparent 30%),
        var(--app-bg);
}

.install-body {
    background:
        radial-gradient(circle at top right, rgba(54,87,255,.13), transparent 35%),
        var(--app-bg);
}

.app-navbar {
    background: linear-gradient(90deg, #172033, #263bb4);
    box-shadow: 0 8px 25px rgba(23, 32, 51, .18);
}

.brand-icon,
.auth-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    color: var(--app-primary);
    font-weight: 800;
    border-radius: 14px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    margin-right: 6px;
}

.auth-logo {
    width: 70px;
    height: 70px;
    font-size: 34px;
    box-shadow: 0 12px 30px rgba(54, 87, 255, .25);
}

.card {
    border: 1px solid rgba(23, 32, 51, .05) !important;
}

.btn-primary {
    background: var(--app-primary);
    border-color: var(--app-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--app-primary-dark);
    border-color: var(--app-primary-dark);
}

.btn-outline-primary {
    color: var(--app-primary);
    border-color: var(--app-primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: var(--app-primary);
    border-color: var(--app-primary);
}

.stat-card {
    min-height: 130px;
}

.pill {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: .35rem .75rem;
    border-radius: 999px;
    background: rgba(54, 87, 255, .10);
    color: var(--app-primary-dark);
    font-size: .82rem;
    font-weight: 700;
}

.topic-card {
    background: #f8faff;
    border: 1px solid rgba(54, 87, 255, .10);
}

.mini-exam-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: .9rem 0;
    border-bottom: 1px solid rgba(23, 32, 51, .08);
}

.mini-exam-row:last-child {
    border-bottom: 0;
}

.score-badge {
    background: rgba(54, 87, 255, .11);
    color: var(--app-primary-dark);
}

.exam-card {
    overflow: hidden;
}

.progress {
    height: 10px;
    background: #e7ebf4;
    border-radius: 999px;
}

.progress-bar {
    background: var(--app-primary);
}

.answer-option {
    display: flex;
    align-items: flex-start;
    gap: .85rem;
    width: 100%;
    padding: 1rem 1.1rem;
    border: 1px solid #d9deea;
    background: #fff;
    border-radius: 18px;
    text-align: left;
    color: var(--app-text);
    transition: transform .12s ease, border-color .12s ease, background .12s ease;
}

.answer-option:hover:not(:disabled) {
    transform: translateY(-1px);
    border-color: var(--app-primary);
    background: #f8faff;
}

.answer-option.correct {
    border-color: rgba(24,160,88,.55);
    background: rgba(24,160,88,.10);
}

.answer-option.wrong {
    border-color: rgba(217,48,37,.55);
    background: rgba(217,48,37,.08);
}

.answer-key {
    min-width: 38px;
    font-weight: 800;
    color: var(--app-primary-dark);
}

.result-circle {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, rgba(54,87,255,.12), rgba(24,160,88,.12));
    border: 8px solid #fff;
    box-shadow: 0 15px 35px rgba(23,32,51,.15);
}

.metric-box {
    padding: 1rem;
    border-radius: 18px;
    background: #f8faff;
}

.metric-box strong {
    display: block;
    font-size: 1.7rem;
}

.metric-box span {
    color: var(--app-muted);
    font-size: .85rem;
}

.metric-box.good strong {
    color: var(--app-success);
}

.metric-box.bad strong {
    color: var(--app-danger);
}

.review-card {
    border-left: 6px solid transparent !important;
}

.review-ok {
    border-left-color: var(--app-success) !important;
}

.review-ko {
    border-left-color: var(--app-danger) !important;
}

.option-review {
    padding: .85rem 1rem;
    border-radius: 14px;
    border: 1px solid #e0e4ef;
    background: #fff;
}

.option-correct {
    border-color: rgba(24,160,88,.45);
    background: rgba(24,160,88,.09);
}

.option-wrong {
    border-color: rgba(217,48,37,.45);
    background: rgba(217,48,37,.08);
}

.table > :not(caption) > * > * {
    padding: 1rem;
}

@media (max-width: 576px) {
    .display-6 {
        font-size: 2rem;
    }
    .card-body.p-5 {
        padding: 2rem !important;
    }
}

.quick-action {
    display: block;
    text-decoration: none;
    color: inherit;
    padding: 1.1rem;
    border-radius: 18px;
    border: 1px solid #e0e4ef;
    background: #fff;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}

.quick-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(23,32,51,.09);
    border-color: rgba(54,87,255,.35);
}

.quick-action strong,
.quick-action span {
    display: block;
}

.quick-action span {
    margin-top: .35rem;
    color: var(--app-muted);
    font-size: .92rem;
}

.quick-action-wrong:hover {
    border-color: rgba(217,48,37,.35);
}

.disabled-action {
    opacity: .65;
    background: #f8faff;
}