:root {
    --bg: #f5f3ef;
    --surface: rgba(255, 255, 255, 0.82);
    --surface-strong: #fffdf8;
    --ink: #131216;
    --muted: #5f5b68;
    --line: rgba(19, 18, 22, 0.11);
    --brand: #5603ad;
    --brand-2: #7828f5;
    --brand-3: #b88cff;
    --brand-deep: #32006e;
    --accent: #5603ad;
    --accent-soft: #f0e9ff;
    --shadow: 0 20px 52px rgba(21, 16, 31, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --container: min(1200px, calc(100vw - 32px));
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(86, 3, 173, 0.14), transparent 32%),
        radial-gradient(circle at top right, rgba(120, 40, 245, 0.12), transparent 28%),
        linear-gradient(180deg, #f9f6ef 0%, #f5f3ef 48%, #ebe6dd 100%);
    font-family: "Sora", "Aptos", "Segoe UI", sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

a:focus-visible,
summary:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid #4a148c;
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    left: 16px;
    top: -80px;
    z-index: 100;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--ink);
    color: white;
}

.skip-link:focus {
    top: 16px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

img {
    max-width: 100%;
}

.container {
    width: var(--container);
    margin: 0 auto;
}

.narrow {
    max-width: 840px;
}

.announcement-bar {
    color: rgba(255, 255, 255, 0.9);
    background:
        radial-gradient(circle at 80% 50%, rgba(120, 40, 245, 0.44), transparent 30%),
        linear-gradient(90deg, #131216, #28005a);
    font-size: 0.78rem;
}

.announcement-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 34px;
}

.announcement-inner strong,
.announcement-links a {
    color: #fff;
    font-weight: 700;
}

.announcement-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 16px;
}

.announcement-links a {
    text-decoration: underline;
    text-decoration-color: rgba(217, 196, 255, 0.8);
    text-underline-offset: 3px;
}

.announcement-links a:hover {
    color: #d9c4ff;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(245, 243, 239, 0.9);
    border-bottom: 1px solid var(--line);
}

.nav-wrap {
    display: flex;
    gap: 24px;
    align-items: center;
    justify-content: space-between;
    min-height: 78px;
}

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

.brand strong,
.brand small {
    display: block;
}

.brand strong,
.hero-copy h1,
.page-hero h1,
.section-heading h2,
.domain-head h2,
.sidebar-card h2,
.content-panel h2 {
    font-family: "Orbitron", "Aptos Display", "Segoe UI", sans-serif;
}

.brand small {
    color: var(--muted);
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 48px;
    height: 48px;
    flex: 0 0 auto;
}

.brand-logo-image {
    display: block;
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 8px 16px rgba(86, 3, 173, 0.22));
}

.site-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--muted);
    transition: 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
    color: var(--brand-deep);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: inset 0 0 0 1px rgba(86, 3, 173, 0.18);
}

.hero,
.page-hero {
    padding: 64px 0 24px;
}

.hero-grid,
.split-grid,
.article-layout,
.exam-layout,
.glossary-grid {
    display: grid;
    gap: 24px;
}

.hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.85fr);
    align-items: start;
}

.hero-copy h1,
.page-hero h1 {
    margin: 14px 0 18px;
    line-height: 1.02;
    letter-spacing: -0.04em;
    font-size: clamp(2.7rem, 6vw, 5.4rem);
}

.page-hero h1 {
    font-size: clamp(2.2rem, 5vw, 4.2rem);
}

.hero-copy p,
.page-hero p {
    margin: 0;
    font-size: 1.08rem;
    color: var(--muted);
}

.hero-panel,
.content-sidebar,
.stack-list,
.question-index-grid {
    display: grid;
    gap: 14px;
}

.metric-card,
.panel-card,
.list-card,
.sidebar-card,
.question-shell,
.setup-card,
.content-panel,
.glossary-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    border-radius: var(--radius-lg);
}

.metric-card {
    padding: 20px;
}

.metric-card strong {
    display: block;
    font-size: 2.2rem;
    line-height: 1;
    margin-top: 10px;
}

.account-metrics {
    margin-top: 1.25rem;
}

.account-simulations {
    margin-top: 2rem;
}

.account-simulations h2 {
    margin-bottom: 0.8rem;
}

.account-simulation-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.account-simulation-card h3,
.account-simulation-card p {
    margin: 0;
}

.account-simulation-card p {
    margin-top: 0.4rem;
}

.metric-label,
.eyebrow {
    color: var(--brand-deep);
    text-transform: uppercase;
    font-size: 0.76rem;
    letter-spacing: 0.16em;
    font-weight: 700;
}

.hero-points,
.content-list,
.link-list {
    margin: 0;
    padding-left: 18px;
}

.cta-row,
.tag-row,
.filters-form,
.exam-actions,
.resource-box {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border: 0;
    border-radius: 999px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button-primary {
    color: white;
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(23, 32, 51, 0.16);
}

.button:disabled,
.button[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.52;
    transform: none;
    box-shadow: none;
}

.button.is-submitting {
    cursor: progress;
    pointer-events: none;
}

.button-secondary {
    color: var(--ink);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: inset 0 0 0 1px rgba(23, 32, 51, 0.1);
}

.button-secondary:hover {
    background: var(--surface-strong);
    box-shadow: inset 0 0 0 1px rgba(86, 3, 173, 0.28), 0 10px 22px rgba(23, 32, 51, 0.1);
}

.button-block {
    width: 100%;
}

.section {
    padding: 28px 0 56px;
}

.section-soft {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0));
}

.section-heading {
    margin-bottom: 20px;
}

.section-heading h2,
.domain-head h2,
.sidebar-card h2,
.content-panel h2 {
    margin: 8px 0 10px;
    line-height: 1.1;
    font-size: clamp(1.7rem, 3vw, 2.6rem);
}

.card-grid,
.setup-grid {
    display: grid;
    gap: 18px;
}

.card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel-card,
.list-card,
.sidebar-card,
.setup-card,
.content-panel,
.glossary-card,
.question-shell {
    padding: 24px;
}

.panel-card h2,
.panel-card h3,
.list-card strong,
.question-shell h2 {
    margin-top: 0;
}

.panel-card p,
.list-card span,
.sidebar-card p,
.empty-state,
.text-link,
.site-footer p {
    color: var(--muted);
}

.panel-card a,
.list-card a,
.text-link {
    color: var(--accent);
    font-weight: 700;
}

.panel-card a,
.list-card a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    min-height: 42px;
    margin-top: 8px;
    padding: 9px 14px;
    border: 1px solid rgba(86, 3, 173, 0.3);
    border-radius: 999px;
    background: rgba(240, 233, 255, 0.84);
    box-shadow: 0 4px 10px rgba(86, 3, 173, 0.08);
    transition: 160ms ease;
}

.panel-card a::after,
.list-card a::after {
    content: "->";
    font-size: 0.9em;
}

.panel-card a:hover,
.list-card a:hover {
    color: var(--brand-deep);
    background: var(--accent-soft);
    transform: translateX(3px);
    box-shadow: 0 8px 18px rgba(86, 3, 173, 0.16);
}

.text-link {
    text-decoration: underline;
    text-decoration-color: rgba(86, 3, 173, 0.42);
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.text-link:hover {
    color: var(--brand-deep);
    text-decoration-color: currentColor;
}

.split-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.article-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.8fr);
    align-items: start;
}

.table-wrap {
    overflow-x: auto;
}

.content-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 620px;
}

.content-table th,
.content-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.content-table th {
    color: var(--brand-deep);
    font-size: 0.88rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.pill,
.index-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 700;
    background: rgba(86, 3, 173, 0.1);
    color: var(--accent);
}

.search-form,
.filters-panel,
.question-form,
.exam-main,
.question-topbar,
.setup-grid label {
    display: grid;
    gap: 14px;
}

.search-form {
    grid-template-columns: minmax(0, 1fr) auto;
    margin-top: 24px;
}

input[type="search"],
input[type="email"],
input[type="password"],
select {
    min-height: 50px;
    width: 100%;
    border: 1px solid rgba(23, 32, 51, 0.12);
    border-radius: 14px;
    padding: 0 14px;
    background: rgba(255, 255, 255, 0.96);
    color: var(--ink);
}

input:disabled,
select:disabled {
    cursor: not-allowed;
    color: var(--muted);
    background: rgba(23, 32, 51, 0.05);
}

input:user-invalid,
select:user-invalid {
    border-color: #b54708;
    box-shadow: 0 0 0 3px rgba(181, 71, 8, 0.12);
}

.question-shell {
    display: grid;
    gap: 18px;
}

.question-topbar {
    grid-template-columns: repeat(2, auto);
    justify-content: space-between;
    align-items: center;
}

.options-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    border: 0;
}

.option-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: start;
    padding: 16px 18px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid rgba(23, 32, 51, 0.08);
    cursor: pointer;
    transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.option-card:hover {
    border-color: rgba(86, 3, 173, 0.3);
    background: var(--surface-strong);
    box-shadow: 0 8px 20px rgba(23, 32, 51, 0.07);
}

.option-card:has(input:checked) {
    border-color: var(--brand);
    background: linear-gradient(135deg, rgba(240, 233, 255, 0.98), rgba(255, 253, 248, 0.98));
    box-shadow: 0 10px 24px rgba(86, 3, 173, 0.12);
}

.option-card:has(input:focus-visible) {
    outline: 3px solid rgba(86, 3, 173, 0.55);
    outline-offset: 3px;
}

.option-card:has(input:disabled) {
    cursor: default;
    opacity: 0.76;
}

.empty-state {
    padding: 18px 20px;
    border: 1px dashed rgba(86, 3, 173, 0.35);
    border-radius: var(--radius-md);
    background: rgba(240, 233, 255, 0.52);
}

.feedback-panel {
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
}

.feedback-panel.is-correct {
    background: rgba(86, 3, 173, 0.08);
    border-color: rgba(86, 3, 173, 0.18);
}

.feedback-panel.is-wrong {
    background: rgba(199, 88, 43, 0.08);
    border-color: rgba(199, 88, 43, 0.2);
}

.setup-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-bottom: 18px;
}

.setup-grid label span {
    font-weight: 700;
}

.account-card {
    display: grid;
    gap: 14px;
    align-content: start;
}

.account-card h2,
.account-card p {
    margin: 0;
}

.exam-shell {
    padding: 32px 0 64px;
}

.exam-layout,
.exam-main {
    gap: 24px;
}

.exam-header {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-end;
}

.timer-card {
    padding: 18px 22px;
    min-width: 190px;
    text-align: right;
    border-radius: var(--radius-lg);
    background: #172033;
    color: white;
}

.timer-card span {
    display: block;
    color: rgba(255, 255, 255, 0.72);
}

.timer-card strong {
    font-size: 2rem;
    font-variant-numeric: tabular-nums;
}

.exam-main {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
}

.exam-finish-note {
    padding: 16px;
    border: 1px solid rgba(199, 88, 43, 0.32);
    border-radius: var(--radius-md);
    background: rgba(199, 88, 43, 0.08);
}

.exam-finish-note strong {
    color: var(--ink);
}

.exam-finish-note p {
    margin: 6px 0 0;
    color: var(--muted);
}

.explanation-card {
    border-left: 4px solid var(--line);
}

.explanation-card.is-correct-option {
    border-left-color: #297a38;
}

.explanation-card.is-distractor-option {
    border-left-color: #a04a19;
}

.explanation-card small {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-weight: 700;
}

.exam-mobile-bar {
    display: none;
}

.question-index-grid {
    grid-template-columns: repeat(auto-fit, minmax(42px, 1fr));
}

.index-pill {
    min-height: 42px;
    background: rgba(23, 32, 51, 0.06);
    color: var(--muted);
}

.index-pill.is-current {
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    color: white;
    box-shadow: 0 8px 16px rgba(86, 3, 173, 0.2);
}

.index-pill.is-answered {
    box-shadow: inset 0 0 0 1px rgba(86, 3, 173, 0.36);
}

.index-pill.is-marked {
    position: relative;
}

.index-pill.is-marked::after {
    content: "";
    position: absolute;
    right: 7px;
    top: 7px;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--brand);
}

.review-toggle {
    display: inline-flex;
    gap: 10px;
    align-items: center;
    width: fit-content;
    padding: 9px 12px;
    border-radius: 12px;
    color: var(--muted);
    background: rgba(23, 32, 51, 0.045);
}

.glossary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scope-note {
    margin: 22px 0 0;
    padding: 14px 16px;
    border-left: 4px solid var(--brand);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--ink);
    background: rgba(240, 233, 255, 0.74);
}

.scope-note strong {
    color: var(--brand-deep);
}

.site-footer {
    padding: 34px 0 48px;
}

.footer-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.domain-block + .domain-block {
    margin-top: 28px;
}

.domain-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 18px;
    margin-bottom: 18px;
}

.study-path,
.decision-grid,
.lab-grid {
    display: grid;
    gap: 14px;
}

.study-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 28px;
}

.study-step,
.decision-card,
.lab-card {
    border: 1px solid rgba(23, 32, 51, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.7);
}

.study-step {
    display: grid;
    gap: 4px;
    padding: 16px;
}

.study-step > span {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
}

.study-step small,
.decision-card small,
.lab-card small,
.decision-row small {
    color: var(--muted);
}

.decision-grid,
.lab-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.decision-card,
.lab-card {
    padding: 0;
    overflow: hidden;
}

.decision-card summary,
.lab-card summary {
    position: relative;
    display: grid;
    gap: 4px;
    padding: 18px 48px 18px 20px;
    cursor: pointer;
    list-style: none;
    background: rgba(255, 255, 255, 0.72);
    transition: 160ms ease;
}

.decision-card summary::-webkit-details-marker,
.lab-card summary::-webkit-details-marker {
    display: none;
}

.decision-card summary::after,
.lab-card summary::after {
    content: "Abrir +";
    position: absolute;
    right: 20px;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
}

.decision-card[open] summary::after,
.lab-card[open] summary::after {
    content: "Cerrar -";
}

.decision-card summary:hover,
.lab-card summary:hover {
    background: var(--accent-soft);
}

.site-footer {
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.76);
    background:
        radial-gradient(circle at 82% 8%, rgba(120, 40, 245, 0.38), transparent 34%),
        linear-gradient(135deg, #070708, #18171d);
}

.site-footer p {
    color: rgba(255, 255, 255, 0.68);
}

.site-footer strong {
    color: #fff;
    font-family: "Orbitron", "Aptos Display", "Segoe UI", sans-serif;
}

.footer-grid {
    grid-template-columns: 1.1fr 0.85fr 1fr;
    align-items: start;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.footer-links a {
    color: #fff;
    font-weight: 700;
    text-decoration: underline;
    text-decoration-color: rgba(184, 140, 255, 0.7);
    text-underline-offset: 4px;
}

.footer-links a:hover {
    color: var(--brand-3);
}

.legal-page {
    padding-bottom: 64px;
}

.legal-page .content-panel {
    max-width: 880px;
}

.legal-page h2 {
    margin: 32px 0 10px;
    font-size: 1.3rem;
}

.legal-page h2:first-child {
    margin-top: 0;
}

.legal-page a {
    color: var(--brand);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.decision-card[open] summary,
.lab-card[open] summary {
    border-bottom: 1px solid var(--line);
}

.decision-rows,
.lab-steps,
.lab-card > .button {
    margin: 0 20px 20px;
}

.decision-rows {
    display: grid;
    gap: 1px;
    border-top: 1px solid var(--line);
}

.decision-row {
    display: grid;
    gap: 4px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.58);
}

.lab-steps {
    display: grid;
    gap: 8px;
    padding-left: 24px;
}

.lab-card > .button {
    width: calc(100% - 40px);
}

@media (max-width: 920px) {
    .hero-grid,
    .split-grid,
    .article-layout,
    .exam-main,
    .footer-grid,
    .study-path,
    .decision-grid,
    .lab-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .card-grid,
    .compact-grid,
    .setup-grid,
    .glossary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .nav-wrap,
    .exam-header,
    .domain-head {
        align-items: start;
        flex-direction: column;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .exam-shell {
        padding-bottom: 118px;
    }

    .exam-mobile-bar {
        position: fixed;
        right: 12px;
        bottom: 12px;
        left: 12px;
        z-index: 30;
        display: grid;
        grid-template-columns: 1fr auto auto;
        gap: 10px;
        align-items: center;
        padding: 10px 12px;
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        background: rgba(255, 253, 248, 0.97);
        box-shadow: var(--shadow);
    }

    .exam-mobile-bar strong {
        font-variant-numeric: tabular-nums;
        color: var(--brand-deep);
    }

    .exam-sidebar {
        display: none;
    }

    .exam-sidebar.is-open {
        position: fixed;
        top: 12px;
        right: 12px;
        bottom: 92px;
        left: 12px;
        z-index: 29;
        display: grid;
        align-content: start;
        overflow: auto;
        padding: 16px;
        border-radius: var(--radius-lg);
        background: var(--surface-strong);
        box-shadow: var(--shadow);
    }
}

@media (max-width: 680px) {
    .announcement-inner {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        padding: 6px 0;
        line-height: 1.35;
    }

    .announcement-links {
        justify-content: flex-start;
    }

    .hero,
    .page-hero {
        padding-top: 36px;
    }

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

    .question-topbar {
        grid-template-columns: 1fr;
    }

    .question-shell,
    .setup-card {
        padding: 18px;
    }

    .card-grid,
    .compact-grid,
    .setup-grid,
    .glossary-grid {
        grid-template-columns: 1fr;
    }

    .exam-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .exam-actions .button:last-child:nth-child(3) {
        grid-column: 1 / -1;
    }

    .exam-mobile-bar {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .exam-mobile-bar .button {
        grid-column: 1 / -1;
        min-height: 42px;
    }
}