/* =============================================================
   Páginas públicas (página inicial, guia, páginas legais).
   Independente do Bootstrap: só é carregado por public_layout.php.
   ============================================================= */

@font-face {
    font-family: 'Bricolage Grotesque';
    font-style: normal;
    font-weight: 500 800;
    font-display: swap;
    src: url('../fonts/bricolage-grotesque-latin.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    --bg: #f7f6f2;
    --bg-alt: #efede6;
    --surface: #ffffff;
    --ink: #1b1640;
    --ink-2: #4a4766;
    --line: #dcd8cc;
    --primary: #4f46e5;
    --primary-hover: #3f37c9;
    --link: #4338ca;
    --mark: #fde68a;
    --cta-bg: #1b1640;
    --cta-ink: #f3f2fa;
    --r-esqueci: #b42318;
    --r-dificil: #a15c07;
    --r-bom: #027a48;
    --r-facil: #175cd3;
    --shadow-card: 0 1px 0 rgba(27, 22, 64, .04), 0 22px 44px -28px rgba(27, 22, 64, .45);
    --radius: 12px;
    --font-head: 'Bricolage Grotesque', 'Segoe UI', system-ui, sans-serif;
    --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14112b;
        --bg-alt: #1a1736;
        --surface: #221e45;
        --ink: #f3f2fa;
        --ink-2: #b9b6d3;
        --line: #36325f;
        --primary: #5b54e8;
        --primary-hover: #6d67f0;
        --link: #aaa6ff;
        --mark: #6b5a12;
        --cta-bg: #0d0b1f;
        --r-esqueci: #ff8a80;
        --r-dificil: #f5b454;
        --r-bom: #5fd3a0;
        --r-facil: #84b4ff;
        --shadow-card: 0 1px 0 rgba(0, 0, 0, .2), 0 22px 44px -26px rgba(0, 0, 0, .8);
        color-scheme: dark;
    }
}

*, *::before, *::after { box-sizing: border-box; }

/* Classes com display próprio (ex.: .pub-btn) não podem anular o atributo hidden. */
.pub [hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body.pub {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.pub img { max-width: 100%; height: auto; }

.pub h1, .pub h2, .pub h3 {
    font-family: var(--font-head);
    color: var(--ink);
    line-height: 1.12;
    letter-spacing: -0.015em;
    margin: 0 0 .6em;
}
.pub h1 { font-size: clamp(2.25rem, 4.6vw, 3.4rem); font-weight: 700; letter-spacing: -0.02em; text-wrap: balance; }
.pub h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); font-weight: 700; text-wrap: balance; }
.pub h3 { font-size: 1.2rem; font-weight: 650; }
.pub p { margin: 0 0 1em; }

.pub a { color: var(--link); text-underline-offset: .18em; text-decoration-thickness: 1px; }
.pub a:hover { text-decoration-thickness: 2px; }

.pub :focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; border-radius: 4px; }
#conteudo:focus { outline: none; }

.pub kbd {
    font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace;
    font-size: .72em;
    padding: .1em .4em;
    border: 1px solid currentColor;
    border-bottom-width: 2px;
    border-radius: 5px;
    opacity: .75;
}

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

.pub-skip {
    position: absolute; left: 16px; top: -60px; z-index: 100;
    background: var(--ink); color: var(--bg) !important; padding: .6rem 1rem; border-radius: 8px;
}
.pub-skip:focus { top: 12px; }

.pub-wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.pub-narrow { max-width: 820px; }

/* ---------------- Botões ---------------- */
.pub-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
    padding: .72rem 1.2rem;
    font: 600 1rem/1.2 var(--font-body);
    border-radius: 10px;
    border: 1px solid transparent;
    text-decoration: none !important;
    cursor: pointer;
    transition: background-color .15s ease, border-color .15s ease, transform .15s ease;
}
.pub-btn:active { transform: translateY(1px); }
.pub-btn-sm { padding: .5rem .9rem; font-size: .93rem; white-space: nowrap; }
.pub-btn-lg { padding: .9rem 1.45rem; font-size: 1.06rem; }
.pub-btn-primary { background: var(--primary); color: #fff !important; }
.pub-btn-primary:hover { background: var(--primary-hover); }
.pub-btn-ghost { background: transparent; color: var(--ink) !important; border-color: var(--line); }
.pub-btn-ghost:hover { border-color: var(--ink-2); }
.pub-btn-dark { background: var(--ink); color: var(--bg) !important; }
.pub-btn-dark:hover { opacity: .9; }
.pub-btn-light { background: #fff; color: #1b1640 !important; }
.pub-btn-light:hover { background: #e9e7ff; }

.pub-actions { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; margin: 0 0 1rem; }

/* ---------------- Cabeçalho ---------------- */
.pub-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: saturate(1.4) blur(8px);
    border-bottom: 1px solid var(--line);
}
.pub-header-inner { display: flex; align-items: center; gap: 2rem; height: 64px; }
.pub-logo {
    display: inline-flex; align-items: center; gap: .5rem;
    font-family: var(--font-head); font-size: 1.18rem; font-weight: 600;
    color: var(--ink) !important; text-decoration: none !important; letter-spacing: -0.01em;
}
.pub-logo strong { font-weight: 780; }
.pub-nav { display: flex; gap: 1.5rem; margin-right: auto; }
.pub-nav a { color: var(--ink-2); text-decoration: none; font-size: .95rem; font-weight: 500; }
.pub-nav a:hover, .pub-nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }
.pub-header-actions { display: flex; align-items: center; gap: 1rem; margin-left: auto; }
.pub-link-login { color: var(--ink) !important; font-weight: 600; text-decoration: none; font-size: .95rem; }
.pub-link-login:hover { text-decoration: underline; }

/* ---------------- Mensagens (flash) ---------------- */
.pub-flash { padding-top: 1rem; }
.pub-flash-item { margin: 0 0 .5rem; padding: .75rem 1rem; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); }
.pub-flash-item.is-danger { border-color: var(--r-esqueci); }
.pub-flash-item.is-success { border-color: var(--r-bom); }

/* ---------------- Tipografia de apoio ---------------- */
.pub-eyebrow {
    font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
    color: var(--primary); margin-bottom: .75rem !important;
}
@media (prefers-color-scheme: dark) { .pub-eyebrow { color: var(--link); } }
.pub-lead { font-size: 1.18rem; color: var(--ink-2); max-width: 36em; }
.pub-lead-narrow { max-width: 40em; margin-bottom: 2.5rem; }
.pub-fineprint { font-size: .9rem; color: var(--ink-2); }

/* ---------------- Seções ---------------- */
.pub-section { padding: 96px 0; }
.pub-section-alt { background: var(--bg-alt); }
.pub-split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: start; }
.pub-prose { max-width: 40em; }
.pub-prose > p:first-child { font-size: 1.12rem; }

.pub-principles { margin: 1.5rem 0 1.75rem; display: grid; gap: 1.25rem; }
.pub-principles div { padding-left: 1.1rem; border-left: 3px solid var(--primary); }
.pub-principles dt { font-family: var(--font-head); font-weight: 650; font-size: 1.12rem; margin-bottom: .2rem; }
.pub-principles dd { margin: 0; color: var(--ink-2); }

/* ---------------- Hero ---------------- */
.pub-hero { padding: 72px 0 96px; }
.pub-hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 64px; align-items: center; }
.pub-hero-copy .pub-lead { margin-bottom: 2rem; }

/* ---------------- Demonstração interativa ---------------- */
.demo { max-width: 470px; width: 100%; justify-self: end; }
.demo-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: .9rem; }
.demo-title { font-size: 1rem !important; font-weight: 650 !important; margin: 0 !important; letter-spacing: 0 !important; }
.demo-progress { margin: 0 !important; font-size: .88rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }

.demo-stage { position: relative; perspective: 1400px; margin-bottom: 1.1rem; }
.demo-stack span {
    position: absolute; inset: 0;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.demo-stack span:first-child { transform: translate(10px, 10px) rotate(1.6deg); opacity: .55; }
.demo-stack span:last-child { transform: translate(5px, 5px) rotate(.8deg); opacity: .8; }

.demo-card {
    position: relative; height: 252px;
    transform-style: preserve-3d;
    transition: transform .6s cubic-bezier(.2, .75, .25, 1), opacity .22s ease, translate .22s ease;
}
.demo-card.is-flipped { transform: rotateY(180deg); }
.demo-card.is-leaving { opacity: 0; translate: -18px 0; }
.demo-card.is-entering { opacity: 0; translate: 18px 0; transition: none; }

.demo-face {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    padding: 1.4rem 1.5rem 1.25rem;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.demo-back { transform: rotateY(180deg); border-top: 3px solid var(--primary); }
.demo-meta {
    display: flex; justify-content: space-between; gap: 1rem;
    font-size: .8rem; font-weight: 600; color: var(--ink-2); margin-bottom: auto !important;
}
.demo-type { font-weight: 500; }
.demo-q, .demo-a { font-family: var(--font-head); font-size: 1.42rem; font-weight: 600; line-height: 1.3; letter-spacing: -0.01em; margin: 1rem 0 auto !important; }
.demo-a { font-family: var(--font-body); font-size: 1.15rem; font-weight: 400; letter-spacing: 0; }
.demo-a strong { font-weight: 700; }
.demo-a em { color: var(--ink-2); font-size: .95em; }
.demo-hint { font-size: .85rem; color: var(--ink-2); margin: 0 !important; }
.demo-cloze {
    display: inline-block; padding: 0 .45em; border-radius: 6px;
    background: color-mix(in srgb, var(--primary) 14%, transparent); color: var(--primary);
    font-weight: 700;
}
@media (prefers-color-scheme: dark) { .demo-cloze { color: var(--link); } }
.pub mark { background: var(--mark); color: inherit; padding: 0 .2em; border-radius: 4px; }

.demo-controls { min-height: 118px; }
.demo-flip { width: 100%; padding: .9rem 1rem; }
.demo-rate-label { font-size: .88rem; color: var(--ink-2); margin: 0 0 .5rem !important; }
.demo-rate-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
.demo-rate-btn {
    display: flex; flex-direction: column; align-items: flex-start; gap: .1rem;
    padding: .6rem .65rem .55rem;
    background: var(--surface); color: var(--ink);
    border: 1px solid var(--line); border-radius: 10px;
    font: inherit; text-align: left; cursor: pointer;
    transition: border-color .15s ease, background-color .15s ease;
}
.demo-rate-btn span { font-weight: 650; font-size: .93rem; }
.demo-rate-btn small { font-size: .76rem; color: var(--ink-2); }
.demo-rate-label { display: flex; justify-content: space-between; gap: 1rem; }
.demo-keys { font-size: .8rem; }
.demo-rate-btn.is-esqueci span { color: var(--r-esqueci); }
.demo-rate-btn.is-dificil span { color: var(--r-dificil); }
.demo-rate-btn.is-bom span { color: var(--r-bom); }
.demo-rate-btn.is-facil span { color: var(--r-facil); }
.demo-rate-btn:hover { border-color: var(--ink-2); }

.demo-done p { font-size: .98rem; }

.demo-queue-wrap { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.demo-queue-title { font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); margin: 0 0 .5rem !important; }
.demo-queue { list-style: none; margin: 0; padding: 0; font-size: .92rem; }
.demo-queue li { display: flex; justify-content: space-between; gap: 1rem; padding: .32rem 0; color: var(--ink-2); }
.demo-queue li.is-current { color: var(--ink); font-weight: 600; }
.demo-queue li.is-current span:first-child::before { content: '▸ '; color: var(--primary); }
.demo-when { font-variant-numeric: tabular-nums; white-space: nowrap; }
.demo-queue li[data-rated] .demo-when { font-weight: 600; }
.demo-queue li[data-rated="esqueci"] .demo-when { color: var(--r-esqueci); }
.demo-queue li[data-rated="dificil"] .demo-when { color: var(--r-dificil); }
.demo-queue li[data-rated="bom"] .demo-when { color: var(--r-bom); }
.demo-queue li[data-rated="facil"] .demo-when { color: var(--r-facil); }

/* Sem JavaScript: a frente e o verso aparecem empilhados, sem controles. */
html:not(.js) .demo-card { height: auto; }
html:not(.js) .demo-face { position: relative; transform: none; }
html:not(.js) .demo-back { margin-top: .75rem; }
html:not(.js) .demo-hint, html:not(.js) .demo-controls, html:not(.js) .demo-stack { display: none; }

/* ---------------- Como funciona ---------------- */
.pub-steps {
    list-style: none; margin: 2.5rem 0 3.5rem; padding: 0;
    display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px;
    counter-reset: step;
}
.pub-steps li { counter-increment: step; padding-top: 1.1rem; border-top: 2px solid var(--ink); }
.pub-steps li::before {
    content: counter(step, decimal-leading-zero);
    display: block; font-family: var(--font-head); font-weight: 700; font-size: 2.4rem; line-height: 1;
    color: var(--primary); margin-bottom: .75rem;
}
@media (prefers-color-scheme: dark) { .pub-steps li::before { color: var(--link); } }
.pub-steps p { color: var(--ink-2); margin: 0; }

.pub-timeline { margin: 0; padding: 1.75rem 1.75rem 1.25rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.pub-timeline figcaption { font-size: 1.02rem; margin-bottom: 1.5rem; }
.pub-timeline ol { list-style: none; margin: 0 0 1rem; padding: 0; display: flex; align-items: flex-end; }
.pub-timeline li {
    flex: calc(1 + var(--i) * .7) 1 0;
    position: relative; padding-top: 1.6rem; min-width: 0;
    border-top: 2px solid var(--line);
}
.pub-timeline li::before {
    content: ''; position: absolute; top: -7px; left: 0;
    width: 12px; height: 12px; border-radius: 50%;
    background: var(--primary); border: 2px solid var(--surface);
}
.pub-timeline-n { display: block; font-size: .76rem; color: var(--ink-2); white-space: nowrap; }
.pub-timeline-v { display: block; font-family: var(--font-head); font-weight: 650; font-size: 1.12rem; white-space: nowrap; }
.pub-timeline .pub-fineprint { margin: 0; font-size: .84rem; }

/* ---------------- Usos ---------------- */
.pub-uses { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--line); }
.pub-uses li {
    display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 360px); gap: 48px; align-items: center;
    padding: 1.6rem 0; border-top: 1px solid var(--line);
}
.pub-uses h3 { margin-bottom: .35rem; }
.pub-uses p { margin: 0; color: var(--ink-2); }
.pub-mini-card {
    padding: .9rem 1.1rem;
    background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
    color: var(--ink) !important; font-weight: 550; font-size: .98rem; line-height: 1.4;
    box-shadow: 0 10px 24px -22px rgba(27, 22, 64, .5);
}
.pub-mini-card > span:first-child {
    display: block; font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
    color: var(--ink-2); margin-bottom: .3rem;
}

/* ---------------- Recursos ---------------- */
.pub-features { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 40px 32px; }
.pub-features h3 { padding-bottom: .6rem; border-bottom: 2px solid var(--ink); margin-bottom: 1rem; }
.pub-features ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .85rem; }
.pub-features li { position: relative; padding-left: 1.1rem; color: var(--ink-2); font-size: .98rem; line-height: 1.5; }
.pub-features li::before { content: ''; position: absolute; left: 0; top: .6em; width: 6px; height: 6px; background: var(--primary); border-radius: 1px; }
.pub-features strong { color: var(--ink); font-weight: 600; }

/* ---------------- Tabela de limites ---------------- */
.pub-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; font-size: .98rem; }
.pub-table th, .pub-table td { text-align: left; vertical-align: top; padding: .8rem 0; border-top: 1px solid var(--line); }
.pub-table th { font-weight: 600; width: 42%; padding-right: 1.25rem; }
.pub-table td { color: var(--ink-2); }
.pub-table tr:last-child th, .pub-table tr:last-child td { border-bottom: 1px solid var(--line); }

/* ---------------- FAQ ---------------- */
.pub-faq { margin-top: 2rem; border-top: 1px solid var(--line); }
.pub-faq details { border-bottom: 1px solid var(--line); }
.pub-faq summary {
    display: flex; justify-content: space-between; align-items: center; gap: 1.5rem;
    padding: 1.15rem 0; cursor: pointer; list-style: none;
}
.pub-faq summary::-webkit-details-marker { display: none; }
.pub-faq summary h3 { font-size: 1.1rem; margin: 0; font-weight: 600; }
.pub-faq summary::after {
    content: ''; flex: none; width: 14px; height: 14px;
    background:
        linear-gradient(currentColor, currentColor) center / 14px 2px no-repeat,
        linear-gradient(currentColor, currentColor) center / 2px 14px no-repeat;
    transition: transform .2s ease;
}
.pub-faq details[open] summary::after { transform: rotate(45deg); }
.pub-faq-a { padding: 0 2.5rem 1.25rem 0; color: var(--ink-2); }
.pub-faq-a p { margin: 0; }

/* ---------------- CTA final ---------------- */
.pub-cta { background: var(--cta-bg); color: var(--cta-ink); padding: 88px 0; }
.pub-cta-inner { text-align: center; max-width: 720px; }
.pub-cta h2 { color: #fff; }
.pub-cta p { color: #c9c6e4; font-size: 1.12rem; margin-bottom: 2rem; }

/* ---------------- Rodapé ---------------- */
.pub-footer { background: var(--bg-alt); border-top: 1px solid var(--line); padding: 56px 0 24px; font-size: .95rem; }
.pub-footer-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr); gap: 48px; }
.pub-footer-brand p { color: var(--ink-2); margin-top: .75rem; max-width: 22em; }
.pub-footer-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.pub-footer-title { font-family: var(--font-body); font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); margin: 0 0 .8rem; }
.pub-footer-nav a { display: block; color: var(--ink); text-decoration: none; padding: .2rem 0; }
.pub-footer-nav a:hover { text-decoration: underline; }
.pub-footer-base { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-2); font-size: .88rem; }
.pub-footer-base p { margin: 0; }

/* ---------------- Artigos (guia e páginas legais) ---------------- */
.pub-article { padding: 64px 0 96px; }
.pub-article-head { max-width: 760px; margin-bottom: 2.5rem; }
.pub-breadcrumb { font-size: .88rem; color: var(--ink-2); margin-bottom: 1.25rem; }
.pub-breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.pub-breadcrumb li + li::before { content: '/'; margin-right: .4rem; color: var(--line); }
.pub-breadcrumb a { color: var(--ink-2); }
.pub-article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 64px; align-items: start; }
.pub-toc { position: sticky; top: 88px; font-size: .92rem; order: 2; }
.pub-toc p { font-weight: 700; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); margin-bottom: .6rem; }
.pub-toc ol { margin: 0; padding-left: 1.1rem; display: grid; gap: .45rem; color: var(--ink-2); }
.pub-toc a { color: var(--ink-2); text-decoration: none; }
.pub-toc a:hover { color: var(--ink); text-decoration: underline; }
.pub-article-body { max-width: 720px; }
.pub-article-body h2 { margin-top: 2.6em; scroll-margin-top: 88px; }
.pub-article-body h3 { margin-top: 1.8em; scroll-margin-top: 88px; }
.pub-article-body > h2:first-child { margin-top: 0; }
.pub-article-body ul, .pub-article-body ol { padding-left: 1.3rem; margin: 0 0 1.2em; }
.pub-article-body li { margin-bottom: .4em; }
.pub-article-body p, .pub-article-body li { color: var(--ink); }
.pub-meta-line { color: var(--ink-2); font-size: .92rem; }
.pub-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 1.25rem 0 1.75rem; }
.pub-compare > div { padding: 1rem 1.1rem; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.pub-compare h4 { margin: 0 0 .5rem; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; }
.pub-compare .is-bad h4 { color: var(--r-esqueci); }
.pub-compare .is-good h4 { color: var(--r-bom); }
.pub-compare p { margin: 0 0 .35rem; font-size: .97rem; }
.pub-compare p:last-child { margin: 0; color: var(--ink-2); }
.pub-callout { margin: 2rem 0; padding: 1.25rem 1.4rem; border-left: 3px solid var(--primary); background: var(--surface); border-radius: 0 10px 10px 0; }
.pub-callout p:last-child { margin: 0; }
.pub-notfound { padding: 120px 0; }

/* ---------------- Responsivo ---------------- */
@media (max-width: 1024px) {
    .pub-features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pub-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pub-article-layout { grid-template-columns: 1fr; gap: 0; }
    .pub-toc { position: static; order: 0; margin-bottom: 2.5rem; padding: 1rem 1.25rem; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
}

@media (max-width: 900px) {
    .pub-hero { padding: 40px 0 64px; }
    .pub-hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .demo { justify-self: stretch; max-width: 560px; }
    .pub-split { grid-template-columns: 1fr; gap: 8px; }
    .pub-nav { display: none; }
    .pub-uses li { grid-template-columns: 1fr; gap: 1rem; }
    .pub-footer-inner { grid-template-columns: 1fr; gap: 32px; }
    .pub-footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    body.pub { font-size: 1rem; }
    .pub-wrap { padding: 0 16px; }
    .pub-section { padding: 64px 0; }
    .pub-header-inner { gap: 1rem; height: 58px; }
    .pub-logo span { font-size: 1.05rem; }
    .pub-header-actions { gap: .75rem; }
    .pub-lead { font-size: 1.08rem; }
    .pub-actions .pub-btn-lg { flex: 1 1 100%; }
    .demo-card { height: 236px; }
    .demo-face { padding: 1.15rem 1.2rem 1rem; }
    .demo-q { font-size: 1.28rem; }
    .demo-a { font-size: 1.06rem; }
    .demo-rate-buttons { grid-template-columns: repeat(2, 1fr); }
    .demo-keys, .demo-flip kbd { display: none; }
    .demo-controls { min-height: 168px; }
    .pub-steps { grid-template-columns: 1fr; gap: 28px; }
    .pub-features { grid-template-columns: 1fr; }
    .pub-timeline { padding: 1.25rem 1rem 1rem; }
    .pub-timeline ol { flex-direction: column; align-items: stretch; gap: 0; }
    .pub-timeline li { flex: none; display: flex; justify-content: space-between; padding: .55rem 0 .55rem 1.4rem; border-top: 0; border-left: 2px solid var(--line); }
    .pub-timeline li::before { top: 50%; left: -7px; transform: translateY(-50%); }
    .pub-table th { width: 45%; }
    .pub-compare { grid-template-columns: 1fr; }
    .pub-faq-a { padding-right: 0; }
}

@media (max-width: 520px) {
    .pub-hide-xs { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .pub *, .pub *::before, .pub *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
    /* Sem rotação 3D: o verso simplesmente substitui a frente. */
    .demo-card.is-flipped { transform: none; }
    .demo-back { transform: none; visibility: hidden; }
    .demo-card.is-flipped .demo-back { visibility: visible; }
    .demo-card.is-flipped .demo-front { visibility: hidden; }
}