:root {
    --quiz-surface: rgba(255, 255, 255, 0.55);
    --quiz-surface-strong: rgba(255, 255, 255, 0.82);
    --quiz-ring: rgba(79, 140, 255, 0.16);
}

body.dark-theme {
    --quiz-surface: rgba(17, 32, 51, 0.45);
    --quiz-surface-strong: rgba(17, 32, 51, 0.75);
    --quiz-ring: rgba(61, 219, 217, 0.12);
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 50%;
    z-index: 10000;
    padding: 12px 18px;
    border-radius: 14px;
    color: white;
    background: #0d1b2c;
    font-weight: 900;
    transform: translate(-50%, -160%);
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translate(-50%, 0);
}

.quiz-page-intro {
    width: min(1180px, calc(100% - 40px));
    margin: 42px auto 0;
    padding: 34px;
    border: 1px solid var(--border);
    border-radius: 34px;
    background:
        radial-gradient(circle at 85% 0%, rgba(61, 219, 217, 0.2), transparent 31%),
        radial-gradient(circle at 5% 100%, rgba(50, 214, 107, 0.18), transparent 28%),
        var(--quiz-surface);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(18px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 28px;
}

.quiz-eyebrow,
.section-kicker {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--green-dark);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.quiz-page-intro h1 {
    max-width: 790px;
    margin: 0 0 14px;
    font-size: clamp(32px, 5vw, 58px);
    line-height: 1;
    letter-spacing: -0.06em;
}

.quiz-page-intro p {
    max-width: 760px;
    color: var(--muted);
    font-size: 15px;
    font-weight: 650;
    line-height: 1.7;
}

.quiz-intro-points {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 8px;
}

.quiz-intro-points span {
    min-width: 112px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--quiz-surface-strong);
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    text-align: center;
}

.quiz-intro-points strong {
    display: block;
    margin-bottom: 4px;
    color: var(--dark);
    font-size: 18px;
}

.lms-tab-container {
    margin-top: 22px;
    border-bottom: 0;
    padding: 7px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--quiz-surface);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(18px);
}

.learning-pulse {
    width: min(1180px, calc(100% - 40px));
    margin: 18px auto 0;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(79, 140, 255, 0.08), rgba(50, 214, 107, 0.06)),
        var(--quiz-surface);
    box-shadow: var(--shadow-soft);
    display: grid;
    grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.4fr);
    align-items: center;
    gap: 24px;
}

.learning-pulse-copy h2 {
    margin-bottom: 8px;
    font-size: clamp(22px, 3vw, 32px);
    letter-spacing: -0.045em;
}

.learning-pulse-copy p {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.6;
}

.learning-pulse-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.pulse-card {
    min-height: 126px;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--quiz-surface-strong);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.pulse-card:hover {
    transform: translateY(-4px);
    border-color: rgba(79, 140, 255, 0.3);
    box-shadow: 0 16px 34px rgba(17, 32, 51, 0.1);
}

.pulse-card span,
.pulse-card small {
    color: var(--muted);
    font-size: 10px;
    font-weight: 800;
}

.pulse-card strong {
    margin: 7px 0;
    color: var(--dark);
    font-size: clamp(22px, 2.7vw, 32px);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.pulse-focus strong {
    font-size: clamp(18px, 2vw, 24px);
}

.lms-tab-nav {
    width: 100%;
    gap: 8px;
}

.lms-tab-btn {
    flex: 1;
    min-height: 64px;
    padding: 11px 18px;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.lms-tab-btn small {
    color: var(--muted);
    font-size: 10px;
    font-weight: 700;
}

.lms-tab-btn.active {
    color: white;
    background: linear-gradient(135deg, #132d4a, #0d1b2c);
    box-shadow: 0 12px 24px rgba(13, 27, 44, 0.18);
}

.lms-tab-btn.active small {
    color: rgba(255, 255, 255, 0.68);
}

.lms-tab-btn.active::after {
    display: none;
}

.section-heading {
    margin-bottom: 16px;
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
}

.section-heading h2 {
    font-size: clamp(24px, 3vw, 34px);
    letter-spacing: -0.045em;
}

.section-heading p {
    max-width: 420px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.55;
    text-align: right;
}

.setup-card,
.arena-setup-card {
    position: relative;
    overflow: visible;
}

.field select {
    appearance: none;
    padding-right: 38px;
    background-image:
        linear-gradient(45deg, transparent 50%, var(--muted) 50%),
        linear-gradient(135deg, var(--muted) 50%, transparent 50%);
    background-position:
        calc(100% - 18px) 21px,
        calc(100% - 13px) 21px;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.field select:hover,
.field select:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px var(--quiz-ring);
}

.setup-summary {
    min-height: 24px;
    margin-top: 10px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 750;
}

.setup-summary strong {
    color: var(--dark);
}

#quick-arena-tab > .arena {
    display: none;
}

.focus-room-note {
    margin-top: 12px;
    padding: 15px 18px;
    border: 1px solid rgba(79, 140, 255, 0.2);
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(79, 140, 255, 0.08), rgba(50, 214, 107, 0.08));
    display: flex;
    align-items: center;
    gap: 13px;
}

.focus-room-note > span {
    width: 38px;
    height: 38px;
    flex: 0 0 auto;
    border-radius: 12px;
    color: white;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    display: grid;
    place-items: center;
    font-size: 19px;
    font-weight: 900;
}

.focus-room-note strong {
    display: block;
    margin-bottom: 3px;
    font-size: 13px;
}

.focus-room-note p {
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.5;
}

.quiz-shell {
    box-shadow: 0 22px 62px rgba(17, 32, 51, 0.12);
}

.question-title {
    text-wrap: balance;
}

.answer-option {
    outline: none;
}

.answer-option:focus-visible {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px var(--quiz-ring);
}

.keyboard-hint {
    margin-top: 14px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
}

.quiz-toast {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 10010;
    max-width: min(380px, calc(100% - 32px));
    padding: 15px 18px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 18px;
    color: white;
    background: rgba(13, 27, 44, 0.95);
    box-shadow: 0 20px 45px rgba(13, 27, 44, 0.3);
    font-size: 13px;
    font-weight: 800;
    line-height: 1.5;
    opacity: 0;
    pointer-events: none;
    transform: translateY(18px);
    transition: opacity 0.24s ease, transform 0.24s ease;
}

.quiz-toast.show {
    opacity: 1;
    transform: translateY(0);
}

.quiz-toast.success {
    background: rgba(17, 126, 66, 0.96);
}

.quiz-toast.warning {
    background: rgba(168, 90, 17, 0.96);
}

.quiz-dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 10020;
    padding: 20px;
    background: rgba(9, 20, 34, 0.72);
    backdrop-filter: blur(16px);
    place-items: center;
}

.quiz-dialog-overlay:not([hidden]) {
    display: grid;
}

.quiz-dialog {
    width: min(460px, 100%);
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background: var(--quiz-surface-strong);
    box-shadow: 0 32px 90px rgba(13, 27, 44, 0.36);
    animation: quizDialogEnter 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.quiz-dialog h2 {
    margin: 6px 0 10px;
    font-size: 26px;
    letter-spacing: -0.04em;
}

.quiz-dialog p {
    margin-bottom: 22px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 650;
    line-height: 1.65;
}

.quiz-dialog .panel-actions {
    justify-content: flex-end;
}

.quiz-dialog-open {
    overflow: hidden;
}

.reveal-ready {
    opacity: 0;
    transform: translateY(18px);
}

.reveal-ready.is-revealed {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.5s ease var(--reveal-delay, 0ms),
        transform 0.5s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay, 0ms);
}

@keyframes quizDialogEnter {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
}

body.dark-theme .btn-ghost {
    color: #8ff0b1;
    background: rgba(50, 214, 107, 0.12);
}

body.dark-theme .result-card {
    background: linear-gradient(135deg, rgba(50, 214, 107, 0.12), rgba(79, 140, 255, 0.1)), var(--white);
}

body.dark-theme .result-mini,
body.dark-theme .review-item {
    background: rgba(255, 255, 255, 0.045);
}

@media (max-width: 900px) {
    .learning-pulse {
        grid-template-columns: 1fr;
    }
    .quiz-page-intro {
        grid-template-columns: 1fr;
    }

    .quiz-intro-points {
        width: 100%;
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 760px) {
    .learning-pulse {
        width: min(100% - 24px, 1180px);
        padding: 18px;
    }

    .learning-pulse-grid {
        grid-template-columns: 1fr;
    }

    .pulse-card {
        min-height: 104px;
    }
    .quiz-page-intro,
    .lms-tab-container {
        width: min(100% - 24px, 1180px);
    }

    .quiz-page-intro {
        margin-top: 24px;
        padding: 24px;
        border-radius: 26px;
    }

    .quiz-intro-points {
        grid-template-columns: 1fr;
    }

    .quiz-intro-points span {
        display: flex;
        align-items: center;
        justify-content: space-between;
        text-align: left;
    }

    .quiz-intro-points strong {
        margin: 0;
    }

    .lms-tab-nav {
        display: grid;
        grid-template-columns: 1fr;
    }

    .lms-tab-btn {
        min-height: 56px;
    }

    .section-heading {
        align-items: start;
        flex-direction: column;
        gap: 8px;
    }

    .section-heading p {
        text-align: left;
    }

    .keyboard-hint {
        display: none;
    }

    .quiz-toast {
        right: 16px;
        bottom: 16px;
    }
}

@media (max-width: 480px) {
    .quiz-page-intro h1 {
        font-size: 34px;
    }

    .lms-tab-btn {
        align-items: flex-start;
        flex-direction: column;
        gap: 3px;
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    .reveal-ready,
    .reveal-ready.is-revealed {
        opacity: 1;
        transform: none;
        transition: none;
    }
}