/* Lema Questões — identidade: azul institucional, preto, branco e neutros; leitura prolongada. */
:root {
  --blue-900: #0b2545;
  --blue-700: #13428a;
  --blue-600: #1a56b8;
  --blue-500: #2f6fd6;
  --blue-100: #e3ecfa;
  --blue-50:  #f2f6fd;

  --ink:      #111418;
  --ink-2:    #3b4350;
  --ink-3:    #5f6876;
  --line:     #d9dee6;
  --line-2:   #eceff4;
  --paper:    #ffffff;
  --canvas:   #f6f7f9;

  --ok:       #1d7a46;
  --ok-bg:    #e6f4ec;
  --err:      #b42318;
  --err-bg:   #fdecea;
  --warn:     #9a5b00;
  --warn-bg:  #fff4e0;

  --primary:  var(--blue-600);
  --primary-hover: var(--blue-700);
  --focus:    #f5b700;

  --radius:   8px;
  --radius-sm: 6px;
  --shadow:   0 1px 2px rgba(17, 20, 24, .06), 0 1px 3px rgba(17, 20, 24, .04);
  --font-ui:  "Public Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-read: "Source Serif 4", Georgia, "Times New Roman", serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e8ebf0; --ink-2: #c2c8d2; --ink-3: #959dab;
    --line: #2c3340; --line-2: #222833;
    --paper: #161a21; --canvas: #0f1217;
    --blue-100: #1b2a44; --blue-50: #141d2c;
    --primary: #5b8ff0; --primary-hover: #7aa6f5;
    --ok: #4cc283; --ok-bg: #12291d; --err: #ff8a80; --err-bg: #2d1514; --warn: #f0b552; --warn-bg: #2b2111;
    --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ink: #e8ebf0; --ink-2: #c2c8d2; --ink-3: #959dab;
  --line: #2c3340; --line-2: #222833;
  --paper: #161a21; --canvas: #0f1217;
  --blue-100: #1b2a44; --blue-50: #141d2c;
  --primary: #5b8ff0; --primary-hover: #7aa6f5;
  --ok: #4cc283; --ok-bg: #12291d; --err: #ff8a80; --err-bg: #2d1514; --warn: #f0b552; --warn-bg: #2b2111;
  --shadow: none;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  font: 16px/1.6 var(--font-ui); color: var(--ink); background: var(--canvas);
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; color: var(--ink); }
h1 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); font-weight: 700; letter-spacing: -.01em; }
h2 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0 0 1rem; }
a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-hover); }
code { font-size: .875em; background: var(--line-2); padding: .1em .35em; border-radius: 4px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

.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; }
.skip-link { position: absolute; left: 1rem; top: -3rem; z-index: 100; background: var(--paper); color: var(--ink); padding: .5rem 1rem; border-radius: var(--radius-sm); box-shadow: var(--shadow); }
.skip-link:focus { top: .75rem; }
.muted { color: var(--ink-3); }

.env-banner { background: #e8590c; color: #fff; text-align: center; font-weight: 700; font-size: .8125rem; letter-spacing: .04em; padding: .35rem 1rem; }

/* ===== Topo ===== */
.topbar { background: var(--blue-900); color: #fff; }
.topbar__inner { max-width: 1200px; margin: 0 auto; padding: .75rem 1rem; display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: #fff; text-decoration: none; }
.brand:hover { color: #fff; }
.brand__mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 7px; background: #fff; color: var(--blue-900); font-weight: 800; font-size: 1.1rem; }
.brand__name { font-size: 1.05rem; letter-spacing: .01em; }
.brand__name strong { font-weight: 700; }
.mainnav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: .25rem; flex-wrap: wrap; }
.mainnav a { display: block; padding: .4rem .75rem; border-radius: var(--radius-sm); color: #d6e2f5; text-decoration: none; font-weight: 500; font-size: .9375rem; }
.mainnav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.mainnav a[aria-current="page"] { background: rgba(255,255,255,.14); color: #fff; }
.topbar__user { margin-left: auto; display: flex; align-items: center; gap: .6rem; }
.userchip { font-size: .875rem; color: #d6e2f5; }
.plan-tag { display: inline-block; margin-left: .25rem; padding: .05rem .45rem; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; font-size: .75rem; }
.topbar .btn--ghost { color: #fff; border-color: rgba(255,255,255,.35); background: transparent; }
.topbar .btn--ghost:hover { background: rgba(255,255,255,.1); color: #fff; }

/* ===== Página ===== */
.page { flex: 1; width: 100%; max-width: 1200px; margin: 0 auto; padding: 2rem 1rem 3rem; outline: none; }
.page-head { margin-bottom: 1.5rem; }
.page-head p { margin: 0; }
.footer { border-top: 1px solid var(--line); background: var(--paper); color: var(--ink-3); font-size: .875rem; }
.footer__inner { max-width: 1200px; margin: 0 auto; padding: 1rem; }

.stack > * + * { margin-top: 1.25rem; }
.grid { display: grid; gap: 1rem; margin-bottom: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); }
.card__title { font-size: 1.05rem; margin-bottom: .75rem; }
.metric { margin: 0; color: var(--ink-2); }
.metric__value { display: block; font-size: 2rem; font-weight: 700; color: var(--ink); line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat { display: flex; flex-direction: column; gap: .25rem; }
.stat__label { color: var(--ink-3); font-size: .875rem; }
.stat__value { font-size: 1.75rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.empty { color: var(--ink-3); background: var(--line-2); border-radius: var(--radius-sm); padding: .9rem 1rem; margin: 0; }

/* ===== Botões ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; min-height: 42px; padding: .55rem 1.1rem; border-radius: var(--radius-sm); border: 1px solid transparent; font: inherit; font-weight: 600; font-size: .9375rem; text-decoration: none; cursor: pointer; transition: background-color .15s, border-color .15s; }
.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-hover); color: #fff; }
.btn--ghost { background: var(--paper); color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { background: var(--blue-50); color: var(--ink); border-color: var(--blue-500); }
.btn--sm { min-height: 34px; padding: .3rem .75rem; font-size: .875rem; }
.btn--block { width: 100%; }
.btn[disabled], .btn[aria-busy="true"] { opacity: .65; cursor: progress; }
.inline-form { display: inline-flex; gap: .4rem; align-items: center; margin: 0; }

/* ===== Formulários ===== */
.form { display: grid; gap: 1rem; }
.form--narrow { max-width: 460px; }
.form-row { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.field { display: grid; gap: .3rem; }
.field label, .fieldset legend { font-weight: 600; font-size: .9375rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="search"], select, textarea {
  width: 100%; min-height: 44px; padding: .55rem .75rem; font: inherit; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm);
}
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--focus); outline-offset: 0; border-color: var(--blue-500); }
input[readonly] { background: var(--line-2); color: var(--ink-3); }
[aria-invalid="true"] { border-color: var(--err) !important; }
.hint { margin: 0; font-size: .8125rem; color: var(--ink-3); }
.field-error { margin: 0; font-size: .875rem; color: var(--err); font-weight: 500; }
.check { display: flex; align-items: flex-start; gap: .55rem; font-size: .9375rem; cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: .2rem; accent-color: var(--primary); flex: none; }
.fieldset { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: .75rem 1rem 1rem; margin: 0; display: grid; gap: .5rem; }
.check-grid { display: grid; gap: .5rem 1.25rem; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.password { position: relative; }
.password input { padding-right: 5.5rem; }
.password__toggle { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); min-height: 34px; padding: 0 .7rem; border: 0; border-radius: 4px; background: transparent; color: var(--primary); font: inherit; font-size: .875rem; font-weight: 600; cursor: pointer; }
.password__toggle:hover { background: var(--blue-50); }

/* ===== Alertas ===== */
.flash-stack { display: grid; gap: .5rem; margin-bottom: 1.25rem; }
.alert { padding: .8rem 1rem; border-radius: var(--radius-sm); border: 1px solid transparent; font-size: .9375rem; }
.alert--success { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.alert--error { background: var(--err-bg); color: var(--err); border-color: color-mix(in srgb, var(--err) 30%, transparent); }
.badge { display: inline-block; padding: .05rem .5rem; border-radius: 999px; font-size: .75rem; font-weight: 600; }
.badge--warn { background: var(--warn-bg); color: var(--warn); }

/* ===== Autenticação ===== */
.auth-card { max-width: 440px; margin: 1rem auto; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem 1.75rem; box-shadow: var(--shadow); }
.auth-links { display: grid; gap: .4rem; margin-top: 1.25rem; font-size: .9375rem; text-align: center; }

/* ===== Início (visitante) ===== */
.hero { display: grid; gap: 2rem; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: center; padding: 2rem 0; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 700; color: var(--primary); margin-bottom: .5rem; }
.hero h1 { font-size: clamp(1.75rem, 1.3rem + 2vw, 2.6rem); max-width: 18ch; }
.lead { font-size: 1.125rem; color: var(--ink-2); max-width: 56ch; }
.hero__actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.hero__list { list-style: none; margin: 0; padding: 1.25rem 1.5rem; background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--radius); display: grid; gap: .6rem; }
.hero__list li { color: var(--ink-2); font-weight: 500; }

/* ===== Tabelas ===== */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); }
.table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.table th, .table td { padding: .6rem .8rem; text-align: left; border-bottom: 1px solid var(--line-2); vertical-align: middle; }
.table th { font-size: .8125rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); background: var(--canvas); }
.table tr:last-child td { border-bottom: 0; }
.table select { min-height: 34px; width: auto; padding: .2rem .5rem; }
.searchbar { display: flex; gap: .5rem; margin-bottom: 1rem; max-width: 520px; }
.pager { display: flex; gap: 1rem; align-items: center; justify-content: center; margin-top: 1rem; }

/* ===== Administração ===== */
.subnav { margin: -0.5rem 0 1.5rem; border-bottom: 1px solid var(--line); }
.subnav ul, .tabs ul { list-style: none; margin: 0; padding: 0; display: flex; gap: .25rem; overflow-x: auto; }
.subnav a, .tabs a { display: block; padding: .55rem .9rem; color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: .9375rem; border-bottom: 3px solid transparent; white-space: nowrap; }
.subnav a:hover, .tabs a:hover { color: var(--ink); }
.subnav a[aria-current="page"], .tabs a[aria-current="page"] { color: var(--primary); border-bottom-color: var(--primary); }
.tabs { margin-bottom: 1.25rem; border-bottom: 1px solid var(--line); }
.page-head--row { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; }
.head-actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.stack-sm > * + * { margin-top: .5rem; }

.filters { display: grid; gap: .75rem 1rem; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); align-items: end; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem; }
.filters .field:first-child { grid-column: span 2; }
.filters__actions { display: flex; gap: .75rem; align-items: center; }
.bulkbar { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-bottom: .5rem; font-size: .9375rem; }
.bulkbar select { width: auto; min-height: 34px; padding: .2rem .5rem; }
.cell-excerpt { max-width: 46ch; color: var(--ink-2); }
.cell-actions { white-space: nowrap; }
.cell-actions > * + * { margin-left: .6rem; }
.cell-list { margin: 0; padding-left: 1.1rem; font-size: .875rem; }
.row-selected td { background: var(--blue-50); }
.linklike { background: none; border: 0; padding: 0; font: inherit; color: var(--primary); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }
.linklike--danger { color: var(--err); }
.btn--danger { background: var(--paper); color: var(--err); border-color: color-mix(in srgb, var(--err) 45%, transparent); }
.btn--danger:hover { background: var(--err-bg); color: var(--err); }

.badge { background: var(--line-2); color: var(--ink-2); }
.badge--draft { background: var(--line-2); color: var(--ink-2); }
.badge--published, .badge--ok { background: var(--ok-bg); color: var(--ok); }
.badge--archived { background: var(--canvas); color: var(--ink-3); border: 1px solid var(--line); }
.badge--error { background: var(--err-bg); color: var(--err); }
.badge--duplicate { background: var(--warn-bg); color: var(--warn); }
.badge--info { background: var(--blue-100); color: var(--primary); }
.alert--info { background: var(--blue-50); color: var(--ink-2); border-color: var(--blue-100); }
.stat--ok .stat__value { color: var(--ok); }
.stat--err .stat__value { color: var(--err); }
.stat--warn .stat__value { color: var(--warn); }
.details summary { cursor: pointer; font-weight: 600; margin-bottom: .5rem; }
.hint-list { margin: 0; padding-left: 1.1rem; font-size: .875rem; color: var(--ink-2); display: grid; gap: .3rem; }

/* editor de questão */
.editor-layout { display: grid; gap: 1.5rem; grid-template-columns: minmax(0, 1fr) 280px; align-items: start; }
.editor-side { display: grid; gap: 1rem; position: sticky; top: 1rem; }
.editor-side input[type="file"] { width: 100%; font-size: .875rem; margin-bottom: .5rem; }
.qform textarea { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .875rem; line-height: 1.5; resize: vertical; }
.edbar { display: flex; flex-wrap: wrap; gap: .25rem; margin-bottom: .3rem; }
.edbar__btn { min-height: 28px; padding: 0 .55rem; border: 1px solid var(--line); border-radius: 4px; background: var(--canvas); color: var(--ink-2); font: inherit; font-size: .75rem; font-weight: 600; cursor: pointer; }
.edbar__btn:hover { border-color: var(--blue-500); color: var(--ink); }
.opt-row { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: .5rem; align-items: start; }
.opt-row .edbar { grid-column: 2; }
.opt-row__key { display: flex; align-items: center; gap: .3rem; padding-top: .55rem; font-weight: 700; cursor: pointer; }
.opt-row__key input { width: 18px; height: 18px; accent-color: var(--ok); }
.opt-row textarea { grid-column: 2; }
.inline-checks { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }
.label { font-weight: 600; font-size: .9375rem; }
.field--wide { grid-column: span 2; }
.form-actions { display: flex; gap: 1rem; align-items: center; }

/* exibição da questão */
.preview-frame { max-width: 860px; }
.qcard { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
.qcard__head { display: flex; flex-wrap: wrap; gap: .4rem .75rem; align-items: center; font-size: .8125rem; color: var(--ink-3); margin-bottom: 1rem; padding-bottom: .75rem; border-bottom: 1px solid var(--line-2); }
.qcard__code { font-weight: 700; color: var(--ink); letter-spacing: .03em; }
.qcard__disc { font-weight: 600; color: var(--primary); }
.qcard__support { background: var(--canvas); border-left: 3px solid var(--line); padding: .75rem 1rem; margin-bottom: 1rem; }
.prose { font-family: var(--font-read); font-size: 1.0625rem; line-height: 1.7; color: var(--ink); overflow-wrap: anywhere; }
.prose p { margin: 0 0 .75rem; }
.prose p:last-child { margin-bottom: 0; }
.prose img { max-width: 100%; height: auto; }
.prose table { border-collapse: collapse; margin: .75rem 0; font-family: var(--font-ui); font-size: .9375rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .35rem .6rem; }
.prose th { background: var(--canvas); }
.qopts { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: .5rem; }
.qopt { display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: .75rem; align-items: start; padding: .7rem .9rem; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.qopts--tf .qopt { grid-template-columns: 2rem auto; }
.qopt__letter { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--line); font-weight: 700; font-family: var(--font-ui); }
.qopt--correct { border-color: var(--ok); background: var(--ok-bg); }
.qopt--correct .qopt__letter { background: var(--ok); color: #fff; border-color: var(--ok); }
.qcard__answer { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--line-2); }
.qcard__explanation { margin-top: .75rem; background: var(--blue-50); border-radius: var(--radius-sm); padding: 1rem 1.1rem; }
.qcard__explanation h3 { font-size: .9375rem; margin-bottom: .5rem; }

/* catálogo */
.catalog-layout { display: grid; gap: 1.5rem; grid-template-columns: 320px minmax(0, 1fr); align-items: start; }
.tree { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.tree__item { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .75rem; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: .4rem .6rem; }
.tree__item--d1 { margin-left: 1.5rem; }
.tree__item--d2 { margin-left: 3rem; }
.tree__item--d3 { margin-left: 4.5rem; }
.tree__rename { display: flex; gap: .4rem; flex: 1 1 260px; margin: 0; }
.tree__rename input { min-height: 34px; padding: .25rem .5rem; }
.tree__count { font-size: .8125rem; color: var(--ink-3); }

.error-page { text-align: center; padding: 3rem 1rem; }
.error-page__code { font-size: 3rem; font-weight: 800; color: var(--primary); margin: 0; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding: .5rem 0; }
  .topbar__inner { gap: .75rem; }
  .topbar__user { width: 100%; margin-left: 0; justify-content: space-between; }
  .mainnav { order: 3; width: 100%; overflow-x: auto; }
  .mainnav ul { flex-wrap: nowrap; }
  .page { padding-top: 1.25rem; }
  .auth-card { padding: 1.5rem 1.1rem; border-radius: 0; border-left: 0; border-right: 0; margin: 0 -1rem; }
  .editor-layout, .catalog-layout { grid-template-columns: 1fr; }
  .editor-side { position: static; }
  .filters .field:first-child, .field--wide { grid-column: auto; }
  .qcard { padding: 1rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }