:root {
    --bg-base: #02040e;
    --bg-horizon: radial-gradient(1000px 500px at 50% 120%, rgba(20, 56, 105, 0.32), transparent 70%),
        linear-gradient(180deg, rgba(12, 28, 58, 0.82) 0%, rgba(2, 4, 14, 0.92) 45%, #01030b 100%);
    --card: rgba(12, 18, 38, 0.88);
    --muted: #9fb7da;
    --text: #f6f8ff;
    --accent: #00c6ff;
    --accent-2: #2663ff;
    --success: #1dd1a1;
    --error: #ff6b6b;
    --warning: #ffd166;
    --shadow: 0 28px 50px rgba(1, 5, 20, 0.65);
    --glow: 0 0 20px rgba(38, 99, 255, 0.45);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg-base);
    overflow-x: hidden;
    position: relative;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

body::before {
    background-image: radial-gradient(1px 1px at 16px 22px, rgba(255, 255, 255, 0.7) 0, transparent 55%),
        radial-gradient(1px 1px at 120px 80px, rgba(173, 213, 255, 0.55) 0, transparent 55%),
        radial-gradient(1px 1px at 200px 140px, rgba(255, 255, 255, 0.35) 0, transparent 55%),
        radial-gradient(2px 2px at 60px 200px, rgba(255, 255, 255, 0.22) 0, transparent 60%),
        radial-gradient(2px 2px at 180px 20px, rgba(173, 213, 255, 0.22) 0, transparent 60%);
    background-size: 220px 220px;
    opacity: 0.35;
    animation: drift-stars 46s linear infinite;
}

body::after {
    background: var(--bg-horizon);
    mix-blend-mode: screen;
    opacity: 0.85;
}

#app {
    min-height: 100%;
    display: grid;
    place-items: center;
    padding: clamp(16px, 4vw, 32px);
    position: relative;
    z-index: 1;
}

.screen {
    display: none;
    width: min(960px, 94vw);
}

.screen.active {
    display: block;
    animation: fade-in 240ms ease, float-in 700ms ease;
}

.card {
    position: relative;
    background: linear-gradient(160deg, rgba(4, 11, 24, 0.92), rgba(11, 19, 38, 0.78));
    border: 1px solid rgba(60, 102, 168, 0.28);
    backdrop-filter: saturate(150%) blur(14px);
    border-radius: 22px;
    padding: clamp(24px, 5vw, 36px);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background: radial-gradient(600px 360px at -10% -20%, rgba(0, 198, 255, 0.18), transparent 70%),
        radial-gradient(420px 220px at 110% 0%, rgba(38, 99, 255, 0.16), transparent 72%);
}

.card-start {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 320px);
    align-items: center;
    gap: clamp(18px, 4vw, 32px);
}

.card-start .card-content {
    display: grid;
    gap: clamp(14px, 3vw, 22px);
    text-align: left;
}

.card-start .card-illustration {
    justify-self: center;
}

.card-illustration {
    margin: 0;
    border-radius: 20px;
    overflow: hidden;
    max-width: clamp(260px, 32vw, 360px);
    aspect-ratio: 7 / 8;
    box-shadow: 0 28px 60px rgba(1, 8, 24, 0.55);
}

.card-illustration img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#screen-end.active {
    display: block;
}

.card-end {
    display: grid;
    gap: clamp(18px, 3vw, 26px);
}

.card-end .card-content {
    display: grid;
    gap: clamp(14px, 3vw, 22px);
    text-align: left;
}

.card-end .final-visual {
    margin: 6px auto 4px;
    justify-self: center;
    width: min(360px, 100%);
}

.final-visual {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 30px 56px rgba(1, 8, 24, 0.6);
    background: rgba(6, 12, 26, 0.7);
    border: 1px solid rgba(60, 102, 168, 0.24);
}

.final-visual img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-question {
    margin-top: 18px;
    display: grid;
    gap: clamp(16px, 3vw, 24px);
}

h1, h2 {
    margin: 0 0 12px;
}

h1 {
    font-size: clamp(32px, 4vw, 44px);
}

h2 {
    font-size: clamp(24px, 3.5vw, 32px);
}

p {
    line-height: 1.6;
}

.requirements {
    list-style: none;
    padding: 0;
    margin: 18px 0 28px;
    color: var(--muted);
}

.requirements li + li {
    margin-top: 8px;
}

.howto {
    margin: 0 0 24px;
    padding-left: 20px;
    color: var(--muted);
    line-height: 1.6;
}

.actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
}

.btn {
    appearance: none;
    border: none;
    padding: 12px 22px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text);
    background: linear-gradient(140deg, rgba(5, 24, 54, 0.92), rgba(10, 40, 92, 0.92));
    transition: transform 0.12s ease, box-shadow 0.25s ease, background 0.25s ease, filter 0.25s ease;
    box-shadow: 0 18px 32px rgba(1, 6, 18, 0.55);
}

.btn:hover {
    transform: translateY(-1px) scale(1.01);
    filter: brightness(1.05);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 22px 36px rgba(38, 99, 255, 0.28);
}

.btn.secondary {
    background: linear-gradient(135deg, rgba(0, 198, 255, 0.22), rgba(38, 99, 255, 0.18));
    border: 1px solid rgba(0, 198, 255, 0.45);
    box-shadow: none;
}

.btn.ghost {
    background: transparent;
    border: 1px solid rgba(0, 198, 255, 0.35);
    box-shadow: none;
}

.btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--muted);
}

.progress-track {
    position: relative;
    margin: 18px 0 6px;
    height: 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.progress-bar {
    position: absolute;
    inset: 0;
    width: 0%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    box-shadow: var(--glow);
    transition: width 300ms ease;
}

.mission-progress {
    margin: 18px 0 24px;
    padding: 18px 22px;
    border-radius: 18px;
    border: 1px solid rgba(60, 102, 168, 0.25);
    background: rgba(4, 12, 28, 0.7);
    display: grid;
    gap: 12px;
    transition: border 0.25s ease, box-shadow 0.25s ease;
}

.mission-progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-weight: 600;
    color: var(--muted);
}

.mission-progress-title {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.mission-progress-goal {
    font-size: 0.9rem;
    color: var(--text);
}

.mission-status-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    gap: 12px;
}

.mission-marker {
    position: relative;
    display: grid;
    justify-items: center;
    gap: 4px;
    padding: 12px 10px;
    border-radius: 16px;
    border: 1px solid rgba(60, 102, 168, 0.22);
    background: rgba(6, 16, 34, 0.72);
    color: var(--muted);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, border 0.25s ease, background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.mission-marker .marker-index {
    font-size: 1.1rem;
    color: var(--text);
}

.mission-marker .marker-status {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.mission-marker:hover,
.mission-marker:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(0, 198, 255, 0.45);
    outline: none;
}

.mission-marker[data-state="active"] {
    background: rgba(0, 198, 255, 0.18);
    border-color: rgba(0, 198, 255, 0.45);
    box-shadow: var(--glow);
    color: var(--text);
}

.mission-marker[data-state="correct"] {
    background: rgba(29, 209, 161, 0.18);
    border-color: rgba(29, 209, 161, 0.45);
    color: var(--text);
}

.mission-marker[data-state="wrong"] {
    background: rgba(255, 107, 107, 0.18);
    border-color: rgba(255, 107, 107, 0.5);
    color: var(--text);
}

.mission-marker[data-state="upcoming"] {
    opacity: 0.85;
}

.mission-status-feedback {
    min-height: 22px;
    font-size: 0.95rem;
    color: var(--muted);
    transition: color 0.2s ease;
}

.mission-status-feedback[data-state="success"] {
    color: var(--success);
}

.mission-status-feedback[data-state="danger"] {
    color: var(--error);
}

.mission-status-feedback[data-state="warning"] {
    color: var(--warning);
}

.mission-progress[data-state="success"] {
    border-color: rgba(29, 209, 161, 0.4);
    box-shadow: 0 0 18px rgba(29, 209, 161, 0.12);
}

.mission-progress[data-state="danger"] {
    border-color: rgba(255, 107, 107, 0.45);
    box-shadow: 0 0 18px rgba(255, 107, 107, 0.12);
}

.mission-progress[data-state="warning"] {
    border-color: rgba(255, 209, 102, 0.4);
    box-shadow: 0 0 18px rgba(255, 209, 102, 0.12);
}

.level-heading {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    background: rgba(124, 92, 255, 0.18);
    border: 1px solid rgba(124, 92, 255, 0.35);
    color: #d7caff;
}

.badge[data-difficulty="muito-fácil"] {
    background: rgba(29, 209, 161, 0.18);
    border-color: rgba(29, 209, 161, 0.35);
    color: #c8ffef;
}

.badge[data-difficulty="fácil"] {
    background: rgba(0, 212, 255, 0.18);
    border-color: rgba(0, 212, 255, 0.35);
    color: #bff5ff;
}

.badge[data-difficulty="médio"] {
    background: rgba(255, 209, 102, 0.16);
    border-color: rgba(255, 209, 102, 0.35);
    color: #fff1c9;
}

.badge[data-difficulty="difícil"] {
    background: rgba(255, 107, 107, 0.18);
    border-color: rgba(255, 107, 107, 0.35);
    color: #ffd7d7;
}

.statement {
    background: rgba(6, 14, 32, 0.7);
    border: 1px solid rgba(60, 102, 168, 0.22);
    border-radius: 16px;
    padding: 18px;
    margin: 16px 0 24px;
}

.level-art {
    margin: 0;
    border-radius: 20px;
    overflow: hidden;
    width: 100%;
    max-height: 280px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 220ms ease, transform 220ms ease;
    box-shadow: 0 24px 44px rgba(1, 8, 24, 0.45);
}

.level-art.visible {
    opacity: 1;
    transform: translateY(0);
}

.level-art img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.interaction-zone {
    display: grid;
    gap: 18px;
    margin: 18px 0 0;
}

.interaction-zone.interaction-multiple .options-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.option-btn {
    appearance: none;
    border: 1px solid rgba(60, 102, 168, 0.24);
    border-radius: 16px;
    padding: 16px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    background: rgba(5, 14, 32, 0.78);
    color: var(--text);
    transition: transform 0.1s ease, box-shadow 0.2s ease, border 0.2s ease, background 0.2s ease;
    box-shadow: 0 12px 20px rgba(1, 6, 18, 0.45);
}

.option-btn:hover:not([data-state]) {
    transform: translateY(-2px);
    border-color: rgba(0, 198, 255, 0.55);
}

.option-btn[data-state="correct"] {
    border-color: rgba(29, 209, 161, 0.7);
    background: rgba(29, 209, 161, 0.18);
}

.option-btn[data-state="wrong"] {
    border-color: rgba(255, 107, 107, 0.75);
    background: rgba(255, 107, 107, 0.18);
}

.option-btn[data-state="neutral"] {
    opacity: 0.65;
}

.option-btn[disabled] {
    cursor: not-allowed;
    opacity: 0.75;
}

.input-challenge {
    display: grid;
    gap: 10px;
    background: rgba(5, 12, 26, 0.78);
    border: 1px solid rgba(60, 102, 168, 0.22);
    border-radius: 18px;
    padding: 18px;
    box-shadow: inset 0 0 0 1px rgba(60, 102, 168, 0.08);
}

.input-label {
    font-weight: 600;
}

.input-challenge input[type="number"] {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(60, 102, 168, 0.26);
    background: rgba(3, 9, 22, 0.85);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.input-challenge input[type="number"]:focus {
    outline: none;
    border-color: rgba(0, 198, 255, 0.55);
    box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.22);
}

.input-helper {
    font-size: 0.85rem;
    color: var(--muted);
    min-height: 18px;
}

.input-helper[data-state="error"] {
    color: var(--error);
}

.input-helper[data-state="success"] {
    color: var(--success);
}

.final-status {
    margin: 6px 0 12px;
    font-size: 1rem;
    color: var(--muted);
    min-height: 22px;
}

.final-status[data-state="success"] {
    color: var(--success);
}

.final-status[data-state="warning"] {
    color: var(--warning);
}

.final-status[data-state="danger"] {
    color: var(--error);
}

.card-end[data-result="fail"] {
    border-color: rgba(255, 107, 107, 0.4);
}

.card-end[data-result="fail"]::after {
    background: radial-gradient(600px 300px at 100% 0%, rgba(255, 107, 107, 0.18), transparent 70%);
}

.input-challenge[data-state="correct"] {
    border-color: rgba(29, 209, 161, 0.5);
}

.input-challenge[data-state="wrong"] {
    border-color: rgba(255, 107, 107, 0.45);
}

.multi-input-challenge {
    display: grid;
    gap: 16px;
    background: rgba(5, 12, 26, 0.78);
    border: 1px solid rgba(60, 102, 168, 0.22);
    border-radius: 18px;
    padding: 20px;
}

.multi-input-grid {
    display: grid;
    gap: 14px;
}

@media (min-width: 640px) {
    .multi-input-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.multi-input-field {
    display: grid;
    gap: 6px;
}

.multi-input-field label {
    font-weight: 600;
    color: var(--text);
    display: block;
}

.multi-input-field input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(60, 102, 168, 0.26);
    background: rgba(3, 9, 22, 0.85);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.multi-input-field input[type="number"]:focus {
    outline: none;
    border-color: rgba(0, 198, 255, 0.55);
    box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.24);
}

.multi-input-challenge[data-state="correct"] {
    border-color: rgba(29, 209, 161, 0.5);
}

.multi-input-challenge[data-state="wrong"] {
    border-color: rgba(255, 107, 107, 0.45);
}

.slider-challenge {
    display: grid;
    gap: 12px;
    background: rgba(5, 12, 26, 0.78);
    border: 1px solid rgba(60, 102, 168, 0.22);
    border-radius: 18px;
    padding: 20px;
}

.slider-instruction {
    margin: 0;
    font-weight: 600;
}

.slider-value {
    font-size: 1.05rem;
    font-weight: 600;
    padding: 10px 14px;
    border-radius: 12px;
    background: rgba(5, 14, 32, 0.7);
    border: 1px solid rgba(60, 102, 168, 0.24);
    text-align: center;
}

.slider-challenge input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.slider-challenge[data-state="correct"] {
    border-color: rgba(29, 209, 161, 0.5);
}

.slider-challenge[data-state="wrong"] {
    border-color: rgba(255, 107, 107, 0.45);
}

.feedback {
    min-height: 28px;
    margin-top: 16px;
    font-weight: 600;
    text-align: center;
}

.feedback.success {
    color: var(--success);
}

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

.summary {
    margin-top: 24px;
    display: grid;
    gap: 18px;
    text-align: left;
}

.summary > p {
    margin: 0;
    color: var(--muted);
}

.summary-item {
    background: rgba(4, 12, 28, 0.7);
    border: 1px solid rgba(60, 102, 168, 0.22);
    border-radius: 18px;
    padding: 18px;
    display: grid;
    gap: 12px;
}

.summary-item[data-result="correct"] {
    border-color: rgba(29, 209, 161, 0.55);
}

.summary-item[data-result="wrong"] {
    border-color: rgba(255, 107, 107, 0.55);
}

.summary-header {
    display: grid;
    gap: 4px;
}

.summary-header strong {
    color: #fff;
}

.summary-body {
    display: grid;
    gap: 4px;
    color: var(--muted);
}

.summary-note {
    margin-top: 4px;
    display: inline-block;
    padding: 8px 12px;
    border-radius: 12px;
    background: rgba(5, 14, 32, 0.72);
    border: 1px solid rgba(60, 102, 168, 0.2);
    color: #fff;
}

@media (max-width: 620px) {
    #app {
        padding: 16px;
    }

    .card-start {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .card-start .card-content,
    .card-end .card-content {
        text-align: center;
    }

    .card-illustration {
        max-width: 260px;
    }

    #screen-end.active {
        grid-template-columns: 1fr;
        justify-items: center;
    }

    .final-visual {
        max-width: 260px;
    }

    .hud {
        flex-direction: column;
        align-items: flex-start;
    }

    .card {
        padding: 22px;
    }

    .interaction-zone.interaction-multiple .options-grid {
        grid-template-columns: 1fr;
    }

    .card-question {
        gap: 18px;
    }
}

@media (max-width: 480px) {
    .actions {
        width: 100%;
    }

    .actions .btn {
        flex: 1 1 100%;
    }

    .statement {
        padding: 16px;
    }

    .card {
        padding: 20px;
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float-in {
    from {
        filter: blur(6px);
    }
    to {
        filter: blur(0);
    }
}

@keyframes drift-stars {
    from {
        background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
    }
    to {
        background-position: -220px -220px, -180px -260px, -240px -280px, -200px -160px, -160px -120px;
    }
}