/* =========================================================================
   SAD-IFPA — Design System
   Acessibilidade WCAG 2.1 AA · Mobile-first · pt-BR
   ========================================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Cores institucionais IFPA */
  --verde-50:  #e8f4ec;
  --verde-100: #c8e5d1;
  --verde-300: #5fab7e;
  --verde-500: #0b6e3b;
  --verde-600: #075029;
  --verde-700: #053b1e;

  --ouro-300: #ffd97a;
  --ouro-500: #ffbf00;
  --ouro-700: #a87b00;

  --cinza-0:   #ffffff;
  --cinza-50:  #f7f9f8;
  --cinza-100: #eef2ef;
  --cinza-200: #dee4e0;
  --cinza-300: #c4ccc7;
  --cinza-500: #6b746f;
  --cinza-700: #3a403c;
  --cinza-900: #141918;

  --erro-50:   #fde2e2;
  --erro-500:  #b92323;
  --erro-700:  #7a1414;

  --ok-50:   #dff3e3;
  --ok-500:  #1e7e34;

  --aviso-50:   #fff1c9;
  --aviso-500:  #a16207;

  /* Semântica */
  --bg:         var(--cinza-50);
  --superficie: var(--cinza-0);
  --superficie-alt: var(--cinza-100);
  --borda:      var(--cinza-200);
  --texto:      var(--cinza-900);
  --texto-fraco:var(--cinza-500);
  --primaria:   var(--verde-500);
  --primaria-dk:var(--verde-600);
  --primaria-soft: var(--verde-50);
  --acento:     var(--ouro-500);

  /* Raio / Elevação */
  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-1:  0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.08);
  --shadow-2:  0 4px 8px -2px rgba(16,24,40,.07), 0 2px 4px -2px rgba(16,24,40,.06);
  --shadow-3:  0 12px 24px -6px rgba(16,24,40,.12), 0 4px 8px -4px rgba(16,24,40,.08);
  --shadow-focus: 0 0 0 4px rgba(255, 191, 0, .45);

  /* Tipografia */
  --fonte: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --fonte-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Consolas", monospace;
  --fs-xs: .8125rem;  /* 13 */
  --fs-sm: .875rem;   /* 14 */
  --fs-md: 1rem;      /* 16 */
  --fs-lg: 1.125rem;  /* 18 */
  --fs-xl: 1.375rem;  /* 22 */
  --fs-2xl: 1.75rem;  /* 28 */
  --fs-3xl: 2.25rem;  /* 36 */
  --fs-4xl: 3rem;     /* 48 */
  --lh:   1.55;
  --lh-tight: 1.2;

  /* Espaçamento */
  --sp-1: .25rem; --sp-2: .5rem; --sp-3: .75rem; --sp-4: 1rem;
  --sp-5: 1.25rem; --sp-6: 1.5rem; --sp-8: 2rem; --sp-10: 2.5rem;
  --sp-12: 3rem; --sp-16: 4rem;

  /* Transições */
  --t-fast: 120ms cubic-bezier(.4,0,.2,1);
  --t-med:  220ms cubic-bezier(.4,0,.2,1);
}

/* Tema de alto contraste (prefers-contrast) e dark opcional */
@media (prefers-contrast: more) {
  :root {
    --borda: #000; --texto: #000; --bg: #fff;
    --superficie: #fff; --superficie-alt: #eee;
    --primaria: #05401f;
  }
}

/* Reduz movimento para quem prefere */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---------- Reset minimalista ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--fonte);
  font-size: var(--fs-md);
  line-height: var(--lh);
  color: var(--texto);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--primaria-dk); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: var(--verde-700); }

/* Foco consistente e visível para teclado */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--ouro-500);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip-link para leitores de tela / teclado */
.skip-link {
  position: absolute; top: -48px; left: 16px; z-index: 1000;
  background: var(--verde-700); color: #fff; padding: .6rem 1rem;
  border-radius: var(--radius-sm); font-weight: 600;
  transition: top var(--t-fast);
}
.skip-link:focus-visible { top: 12px; }

/* Utilitários a11y */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Layout base ---------- */
.container { width: min(100% - 2rem, 1120px); margin-inline: auto; }
.stack > * + * { margin-top: var(--sp-4); }
.grid { display: grid; gap: var(--sp-5); }
.row { display: flex; gap: var(--sp-4); flex-wrap: wrap; }
.row > * { flex: 1 1 240px; min-width: 0; }
.center { text-align: center; }
.muted { color: var(--texto-fraco); }

/* ---------- App bar / header ---------- */
.app-bar {
  background: var(--primaria);
  color: #fff;
  padding: var(--sp-3) var(--sp-4);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3); flex-wrap: wrap;
  box-shadow: var(--shadow-2);
  position: sticky; top: 0; z-index: 10;
}
.app-bar a:not(.btn) { color: #fff; }   /* links simples ficam brancos; botões preservam suas cores */
.app-bar h1 {
  margin: 0;
  font-size: var(--fs-lg);
  font-weight: 700;
  letter-spacing: -.01em;
  display: flex; align-items: center; gap: .6rem;
}
.app-bar .user { font-size: var(--fs-sm); opacity: .95; }
.logo-mark {
  width: 32px; height: 32px;
  background: var(--ouro-500); color: var(--verde-700);
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: .85rem;
}

main { padding: var(--sp-6) var(--sp-4); max-width: 1120px; margin-inline: auto; }

/* ---------- Cards ---------- */
.card {
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-radius: var(--radius);
  padding: var(--sp-6);
  box-shadow: var(--shadow-1);
  margin-bottom: var(--sp-5);
}
.card h2 {
  margin: 0 0 var(--sp-4);
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -.01em;
}
.card h3 { margin: 0 0 var(--sp-3); font-size: var(--fs-lg); font-weight: 700; }

/* ---------- Formulário ---------- */
label {
  display: block;
  font-weight: 600;
  margin: var(--sp-4) 0 var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--cinza-700);
}
label.inline { display: inline-flex; align-items: center; gap: .5rem; margin: 0; }

input[type=text], input[type=email], input[type=password], input[type=number],
input[type=url], input[type=search], select, textarea {
  width: 100%;
  min-height: 48px;             /* alvo de toque ≥ 44x44 (WCAG 2.5.5) */
  padding: .75rem .9rem;
  border: 1.5px solid var(--borda);
  border-radius: var(--radius-sm);
  background: var(--superficie);
  color: var(--texto);
  font-size: var(--fs-md);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primaria);
  box-shadow: 0 0 0 4px rgba(11, 110, 59, .18);
}
textarea { min-height: 6rem; resize: vertical; }

input[type=checkbox], input[type=radio] {
  width: 1.15rem; height: 1.15rem;
  accent-color: var(--primaria);
  cursor: pointer;
}

small.hint { display: block; color: var(--texto-fraco); font-size: var(--fs-xs); margin-top: .25rem; }

/* ---------- Botões ---------- */
.btn, button:not([class]), button.btn {
  --bg: var(--primaria);
  --fg: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  min-height: 48px;
  padding: .7rem 1.25rem;
  font-weight: 600; font-size: var(--fs-md);
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--bg); color: var(--fg);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.btn:hover, button:not([class]):hover { background: var(--primaria-dk); }
.btn:active { transform: translateY(1px); }

button.sec, .btn.sec {
  --bg: var(--superficie);
  --fg: var(--primaria-dk);
  border-color: var(--primaria);
}
button.sec:hover, .btn.sec:hover { background: var(--verde-50); }

button.ghost, .btn.ghost {
  --bg: transparent;
  --fg: var(--primaria-dk);
  border-color: transparent;
}
button.ghost:hover, .btn.ghost:hover { background: var(--verde-50); }

button.warn, .btn.warn { --bg: var(--aviso-500); --fg: #fff; }
button.danger, .btn.danger { --bg: var(--erro-500); --fg: #fff; }

button[disabled], .btn[disabled], .btn:disabled, button:disabled {
  opacity: .5; cursor: not-allowed; transform: none !important;
}

.btn-large, .btn.btn-large { min-height: 56px; padding: 1rem 1.75rem; font-size: var(--fs-lg); }

/* ---------- Tabelas ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--borda); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .8rem .9rem; text-align: left; border-bottom: 1px solid var(--borda); font-size: var(--fs-sm); }
th { background: var(--superficie-alt); font-weight: 700; color: var(--cinza-700); }
tr:last-child td { border-bottom: 0; }

/* ---------- Tags / badges ---------- */
.tag {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .2rem .6rem; border-radius: 999px;
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: .02em;
  text-transform: uppercase;
}
.tag.waiting      { background: #e0ecff; color: #0a3a87; }
.tag.running      { background: #fff2c0; color: #6b4d06; }
.tag.finished     { background: #d2f0d9; color: #105923; }
.tag.disconnected { background: #f1d6d6; color: #7a1414; }
.tag.invalidated  { background: #f8c5cb; color: #5b0a0f; }
.tag.draft        { background: var(--cinza-100); color: var(--cinza-700); }
.tag.active       { background: var(--verde-50); color: var(--verde-700); }

/* ---------- Alertas ---------- */
.alert {
  display: flex; gap: .7rem; align-items: flex-start;
  padding: .8rem 1rem; border-radius: var(--radius-sm);
  border-left: 4px solid transparent;
  font-size: var(--fs-sm);
  margin: var(--sp-3) 0;
}
.alert.err  { background: var(--erro-50);  color: var(--erro-700);  border-color: var(--erro-500);  }
.alert.ok   { background: var(--ok-50);    color: #0f4a22;          border-color: var(--ok-500);   }
.alert.warn { background: var(--aviso-50); color: #6b4d06;          border-color: var(--aviso-500);}

/* ---------- Métricas ---------- */
.stat {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--primaria-dk);
  line-height: 1;
  letter-spacing: -.02em;
}

/* ---------- Utilidades ---------- */
.kbd {
  font-family: var(--fonte-mono);
  background: var(--superficie-alt);
  border: 1px solid var(--borda);
  padding: .12rem .45rem;
  border-radius: 6px;
  font-size: .85em;
}
hr { border: 0; border-top: 1px solid var(--borda); margin: var(--sp-6) 0; }

/* ---------- Landing (home) ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1200px 420px at 80% -10%, rgba(255,191,0,.28), transparent 60%),
    radial-gradient(800px 380px at 0% 100%, rgba(11,110,59,.18), transparent 60%),
    linear-gradient(135deg, var(--verde-600) 0%, var(--verde-500) 60%, var(--verde-300) 100%);
  color: #fff;
  padding: clamp(3rem, 8vw, 6rem) var(--sp-4);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.08) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 30%, rgba(255,255,255,.06) 0 1px, transparent 1px);
  background-size: 40px 40px, 60px 60px;
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 1120px; margin-inline: auto; }

.hero-badge {
  display: inline-flex; gap: .5rem; align-items: center;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.28);
  padding: .35rem .85rem; border-radius: 999px;
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: .05em;
  text-transform: uppercase; margin-bottom: var(--sp-5);
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: clamp(1.9rem, 5vw, 3.5rem);
  line-height: var(--lh-tight);
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 var(--sp-4);
  max-width: 18ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--ouro-300);
  background: linear-gradient(180deg, transparent 65%, rgba(255, 217, 122, .25) 65%);
  padding: 0 .1em;
}
.hero p.lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  max-width: 60ch;
  opacity: .95;
  margin: 0 0 var(--sp-8);
}

/* Cards de escolha Aluno/Professor */
.choice-grid {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.choice {
  display: block;
  background: rgba(255,255,255,.96);
  color: var(--texto);
  padding: var(--sp-6);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  box-shadow: var(--shadow-3);
  text-decoration: none;
  transition: transform var(--t-med), box-shadow var(--t-med), border-color var(--t-med);
}
.choice:hover, .choice:focus-visible {
  transform: translateY(-4px);
  border-color: var(--ouro-500);
  color: var(--texto);
}
.choice .ico {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  display: grid; place-items: center;
  background: var(--verde-50);
  color: var(--primaria);
  margin-bottom: var(--sp-4);
}
.choice .ico svg { width: 28px; height: 28px; }
.choice h2 { margin: 0 0 .3rem; font-size: var(--fs-xl); }
.choice p  { margin: 0 0 var(--sp-4); color: var(--texto-fraco); }
.choice .cta {
  display: inline-flex; align-items: center; gap: .35rem;
  color: var(--primaria-dk); font-weight: 700;
}
.choice .cta::after { content: "→"; transition: transform var(--t-fast); }
.choice:hover .cta::after { transform: translateX(4px); }

/* Seções da landing */
.section { padding: clamp(3rem, 7vw, 5rem) var(--sp-4); }
.section h2.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800; letter-spacing: -.01em;
  margin: 0 0 var(--sp-3); text-align: center;
}
.section p.section-sub {
  max-width: 60ch; text-align: center; margin: 0 auto var(--sp-10);
  color: var(--texto-fraco); font-size: var(--fs-lg);
}

.features {
  display: grid; gap: var(--sp-5);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.feature {
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-radius: var(--radius);
  padding: var(--sp-6);
  transition: transform var(--t-med), box-shadow var(--t-med);
}
.feature:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.feature .ico {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--verde-50); color: var(--primaria);
  display: grid; place-items: center;
  margin-bottom: var(--sp-3);
}
.feature h3 { margin: 0 0 .35rem; }
.feature p  { margin: 0; color: var(--texto-fraco); font-size: var(--fs-sm); }

.steps {
  display: grid; gap: var(--sp-5);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  counter-reset: step;
}
.step {
  padding: var(--sp-6);
  border-radius: var(--radius);
  background: var(--superficie);
  border: 1px solid var(--borda);
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute; top: -14px; left: var(--sp-6);
  background: var(--primaria); color: #fff;
  padding: .1rem .7rem; border-radius: 999px;
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: .1em;
}
.step h3 { margin: .4rem 0 .5rem; }
.step p  { margin: 0; color: var(--texto-fraco); font-size: var(--fs-sm); }

.footer {
  background: var(--verde-700);
  color: #dfe6e2;
  padding: var(--sp-10) var(--sp-4);
  margin-top: var(--sp-12);
  font-size: var(--fs-sm);
}
.footer a { color: var(--ouro-300); }
.footer .footer-grid {
  max-width: 1120px; margin: 0 auto;
  display: grid; gap: var(--sp-6);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.footer h4 { color: #fff; margin: 0 0 .6rem; font-size: var(--fs-md); }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { padding: .2rem 0; }
.footer .legal { text-align: center; opacity: .7; margin-top: var(--sp-8); }

/* ---------- Tela de prova (kiosque) ---------- */
body.in-exam {
  background:
    radial-gradient(600px 300px at 10% -10%, rgba(255,191,0,.08), transparent),
    var(--verde-700);
  /* Anti-colagem mobile: impede seleção de texto em toda a página */
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;  /* iOS: bloqueia menu de long-press */
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: contain; /* bloqueia pull-to-refresh no mobile */
}
/* Mas deixa digitar em campos (dissertativa) */
body.in-exam textarea,
body.in-exam input {
  -webkit-user-select: text;
  user-select: text;
  -webkit-touch-callout: default;
}
body.in-exam .app-bar {
  background: rgba(0,0,0,.12);
  border-bottom: 1px solid rgba(255,255,255,.1);
  box-shadow: none;
}
.exam-shell { max-width: 760px; margin: 0 auto; padding: var(--sp-4); }
.timer {
  font-family: var(--fonte-mono);
  font-size: var(--fs-2xl); font-weight: 700;
  color: var(--primaria-dk);
  font-variant-numeric: tabular-nums;
}
.ans-opt {
  display: block; margin: .5rem 0;
  border: 2px solid var(--borda); background: var(--superficie);
  padding: 1rem 1.1rem; border-radius: var(--radius);
  cursor: pointer; transition: border-color var(--t-fast), background var(--t-fast);
  min-height: 56px;
}
.ans-opt:hover, .ans-opt:focus-within { border-color: var(--primaria); background: var(--verde-50); }
.ans-opt input[type=radio] { margin-right: .6rem; }
.ans-opt input[type=radio]:checked + * { font-weight: 700; }
.warn-banner {
  background: #fff4cc; border: 1px solid #edd27b;
  padding: .8rem 1rem; border-radius: var(--radius);
  margin: var(--sp-3) 0;
  color: #5a4100; font-weight: 600;
}

/* ---------- Stats section (landing) ---------- */
.stats-band {
  background: var(--verde-700);
  color: #fff;
  padding: var(--sp-10) var(--sp-4);
}
.stats-grid {
  max-width: 1120px; margin: 0 auto;
  display: grid; gap: var(--sp-6);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  text-align: center;
}
.stat-item .big {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--ouro-300);
  letter-spacing: -.02em; line-height: 1;
}
.stat-item .lbl {
  display: block; margin-top: .4rem;
  text-transform: uppercase; letter-spacing: .1em;
  font-size: var(--fs-xs); font-weight: 600;
  opacity: .85;
}

/* ---------- FAQ (acordeão nativo via <details>) ---------- */
.faq { max-width: 780px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--borda); background: var(--superficie);
  border-radius: var(--radius);
  margin-bottom: var(--sp-3); overflow: hidden;
  transition: border-color var(--t-fast);
}
.faq details[open] { border-color: var(--primaria); }
.faq summary {
  cursor: pointer; padding: 1rem 1.1rem;
  font-weight: 700; font-size: var(--fs-md);
  display: flex; align-items: center; gap: .75rem;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+"; display: grid; place-items: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primaria); color: #fff;
  font-weight: 900; font-size: 1.1rem;
  flex-shrink: 0;
  transition: transform var(--t-med), background var(--t-med);
}
.faq details[open] summary::before { transform: rotate(45deg); }
.faq .ans { padding: 0 1.1rem 1rem calc(28px + 1.1rem + .75rem); color: var(--texto-fraco); }

/* ---------- Depoimento ---------- */
.quote-card {
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-left: 4px solid var(--acento);
  border-radius: var(--radius);
  padding: var(--sp-6);
  max-width: 760px; margin: 0 auto;
  position: relative;
}
.quote-card::before {
  content: "“"; font-family: Georgia, serif;
  position: absolute; top: -20px; left: 20px;
  font-size: 5rem; line-height: 1;
  color: var(--acento); opacity: .4;
}
.quote-card blockquote {
  margin: 0; font-size: var(--fs-lg); font-style: italic;
  color: var(--cinza-700); line-height: 1.6;
}
.quote-card .attribution {
  display: flex; align-items: center; gap: .75rem;
  margin-top: var(--sp-4); font-size: var(--fs-sm);
}
.quote-card .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--verde-500), var(--verde-300));
  color: #fff; display: grid; place-items: center;
  font-weight: 700; flex-shrink: 0;
}

/* ---------- Hamburger nav ---------- */
.nav-toggle {
  display: none;
  background: transparent; border: 1.5px solid rgba(255,255,255,.4);
  color: #fff; min-height: 40px; min-width: 40px;
  padding: 0; border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle svg { margin: auto; }

/* ---------- QR Code destaque (lobby) ---------- */
.qr-hero {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr auto;
  align-items: center;
}
.qr-code-box {
  background: #fff; padding: 1rem;
  border: 2px solid var(--borda);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3);
  display: inline-block;
}
.qr-code-box img { width: 280px; height: 280px; max-width: 70vw; }
.access-code-display {
  font-family: var(--fonte-mono);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: .15em;
  color: var(--primaria-dk);
  background: linear-gradient(135deg, var(--verde-50), var(--ouro-300));
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  border: 2px dashed var(--primaria);
  user-select: all;
}
.access-url {
  font-family: var(--fonte-mono);
  font-size: var(--fs-sm);
  background: var(--superficie-alt);
  padding: .55rem .75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--borda);
  display: inline-block;
  user-select: all;
  word-break: break-all;
}
.btn-copy {
  display: inline-flex; align-items: center; gap: .35rem;
  background: transparent; color: var(--primaria-dk);
  border: 1px solid var(--primaria); min-height: 36px;
  padding: .3rem .75rem; font-size: var(--fs-sm);
}
.btn-copy:hover { background: var(--verde-50); }

/* ---------- Métricas em card (monitor) ---------- */
.metric-grid {
  display: grid; gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-bottom: var(--sp-5);
}
.metric {
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-radius: var(--radius);
  padding: var(--sp-5);
  position: relative;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}
.metric:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.metric .label {
  display: flex; align-items: center; gap: .4rem;
  font-size: var(--fs-xs); font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--texto-fraco);
  margin-bottom: var(--sp-3);
}
.metric .label .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--primaria);
}
.metric.running .dot { background: var(--aviso-500); animation: pulse-dot 2s ease-in-out infinite; }
.metric.alert .dot { background: var(--erro-500); }
.metric.finished .dot { background: var(--ok-500); }
.metric .value {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--texto);
  letter-spacing: -.02em; line-height: 1;
}
.metric .sub {
  font-size: var(--fs-xs); color: var(--texto-fraco);
  margin-top: .4rem;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .4; transform: scale(1.3); }
}

/* ---------- Esperando (aluno) ---------- */
.waiting-hero {
  text-align: center; padding: var(--sp-10) var(--sp-4);
}
.waiting-pulse {
  width: 120px; height: 120px; margin: 0 auto var(--sp-6);
  border-radius: 50%;
  background: radial-gradient(circle, var(--verde-50) 40%, var(--verde-100) 100%);
  display: grid; place-items: center;
  position: relative;
}
.waiting-pulse::before, .waiting-pulse::after {
  content: ""; position: absolute; inset: 0;
  border-radius: 50%;
  border: 3px solid var(--primaria);
  opacity: 0;
  animation: ripple 2.4s ease-out infinite;
}
.waiting-pulse::after { animation-delay: 1.2s; }
@keyframes ripple {
  0% { transform: scale(.9); opacity: .8; }
  100% { transform: scale(1.8); opacity: 0; }
}
.waiting-pulse svg { width: 48px; height: 48px; color: var(--primaria); z-index: 1; }
.waiting-hero h2 { font-size: var(--fs-2xl); margin: 0 0 var(--sp-2); }
.waiting-hero p { color: var(--texto-fraco); max-width: 40ch; margin: 0 auto; }

/* Lista de dicas durante espera */
.tips-list {
  list-style: none; padding: 0; margin: var(--sp-8) auto 0;
  max-width: 520px;
}
.tips-list li {
  display: flex; gap: .75rem; align-items: flex-start;
  padding: .6rem 0;
  border-bottom: 1px solid var(--borda);
  color: var(--cinza-700);
  font-size: var(--fs-sm);
}
.tips-list li:last-child { border-bottom: 0; }
.tips-list li::before {
  content: "✓";
  color: var(--primaria);
  font-weight: 800; flex-shrink: 0;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--verde-50);
  display: grid; place-items: center;
  font-size: .9rem;
}

/* ---------- Finalização (aluno) ---------- */
.done-hero {
  text-align: center; padding: var(--sp-10) var(--sp-4);
}
.done-check {
  width: 96px; height: 96px; margin: 0 auto var(--sp-6);
  border-radius: 50%;
  background: var(--ok-50);
  border: 3px solid var(--ok-500);
  display: grid; place-items: center;
  animation: done-pop .6s cubic-bezier(.34, 1.56, .64, 1) both;
}
.done-check svg { width: 48px; height: 48px; color: var(--ok-500); }
@keyframes done-pop {
  0% { transform: scale(.5); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
.done-invalid {
  background: var(--erro-50);
  border-color: var(--erro-500);
}
.done-invalid svg { color: var(--erro-500); }
.score-big {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800; color: var(--primaria-dk);
  letter-spacing: -.02em; line-height: 1;
  margin: var(--sp-4) 0;
}
.score-big .divider { color: var(--texto-fraco); opacity: .5; font-weight: 400; }

/* ---------- Split auth layout (login/ingresso) ---------- */
.auth-wrapper {
  min-height: calc(100vh - 68px); /* desconta app-bar */
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-4);
}
.auth-panel {
  position: relative;
  background:
    radial-gradient(600px 300px at 10% 0%, rgba(255,191,0,.22), transparent 60%),
    radial-gradient(400px 300px at 100% 100%, rgba(255,217,122,.18), transparent 60%),
    linear-gradient(150deg, var(--verde-600) 0%, var(--verde-500) 60%, var(--verde-300) 100%);
  color: #fff;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  padding: var(--sp-10) var(--sp-8);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 520px;
}
.auth-panel::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.1) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 30%, rgba(255,255,255,.07) 0 1px, transparent 1px);
  background-size: 40px 40px, 60px 60px;
  pointer-events: none;
  opacity: .7;
}
.auth-panel > * { position: relative; z-index: 1; }
.auth-panel .auth-logo {
  display: inline-flex; align-items: center; gap: .6rem;
  font-weight: 700; font-size: var(--fs-md);
  opacity: .9;
  margin-bottom: var(--sp-6);
}
.auth-panel .auth-logo .logo-mark {
  background: #fff; color: var(--verde-700);
}
.auth-panel h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: var(--lh-tight);
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 var(--sp-3);
  max-width: 16ch;
}
.auth-panel p.auth-lead {
  font-size: var(--fs-lg);
  opacity: .94;
  max-width: 36ch;
  margin: 0 0 var(--sp-6);
}
.auth-bullets {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: .85rem;
}
.auth-bullets li {
  display: flex; gap: .75rem; align-items: flex-start;
  font-size: var(--fs-sm);
  opacity: .96;
}
.auth-bullets li svg {
  flex-shrink: 0;
  width: 22px; height: 22px;
  background: rgba(255,255,255,.18);
  border-radius: 50%;
  padding: 4px;
  color: var(--ouro-300);
}
.auth-panel .auth-footer {
  font-size: var(--fs-xs);
  opacity: .72;
  margin-top: var(--sp-6);
}

.auth-form {
  background: var(--superficie);
  border: 1px solid var(--borda);
  border-left: 0;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: var(--sp-10) var(--sp-8);
  display: flex; flex-direction: column; justify-content: center;
}
.auth-form h3 {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin: 0 0 .4rem;
}
.auth-form .auth-sub {
  color: var(--texto-fraco);
  font-size: var(--fs-sm);
  margin: 0 0 var(--sp-5);
}
.auth-switch {
  text-align: center; margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--borda);
  font-size: var(--fs-sm); color: var(--texto-fraco);
}

@media (max-width: 900px) {
  .auth-wrapper {
    grid-template-columns: 1fr;
    padding: 0;
    min-height: 0;
  }
  .auth-panel {
    border-radius: 0;
    padding: var(--sp-8) var(--sp-5);
    min-height: 0;
  }
  .auth-form {
    border-radius: 0;
    border-left: 1px solid var(--borda);
    padding: var(--sp-6) var(--sp-4);
  }
  .auth-panel .auth-bullets { display: none; } /* economiza espaço no mobile */
  .auth-panel p.auth-lead { margin-bottom: 0; }
}

/* ---------- Scroll suave ---------- */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* ---------- Responsive helpers ---------- */
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: .5rem; padding-top: var(--sp-3); }
  .nav-links.open { display: flex; }
  /* Links simples ganham cor branca; botões mantêm o próprio estilo */
  .nav-links a:not(.btn) { color: #fff; padding: .6rem .5rem; border-radius: var(--radius-sm); }
  .nav-links a:not(.btn):hover { background: rgba(255,255,255,.12); }
  /* Botão "Entrar" no mobile ocupa largura total para aparecer bem */
  .nav-links .btn { width: 100%; justify-content: center; }
  .qr-hero { grid-template-columns: 1fr; text-align: center; }
  .qr-code-box { margin: 0 auto; }
}

@media (max-width: 600px) {
  .card { padding: var(--sp-4); }
  .app-bar { padding: var(--sp-3); }
  .btn, button:not([class]) { width: 100%; }
  .btn.auto, .btn-auto { width: auto; }
  .hide-sm { display: none !important; }
  main { padding: var(--sp-4) var(--sp-3); }
  .stat { font-size: var(--fs-2xl); }
  .hero { padding: 3rem 1rem; }
}

/* Print — apenas conteúdo útil */
@media print {
  .app-bar, .footer, button, .btn { display: none !important; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border: 1px solid #000; }
}