:root {
  --ink: #0f172a;
  --muted: #64748b;
  --paper: #f8fafc;
  --card: #ffffff;
  --line: #e2e8f0;
  --blue: #1d4ed8;
  --cyan: #0284c7;
  --yellow: #ca8a04;
  --red: #dc2626;
  --green: #16a34a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

[data-theme="dark"] {
  --ink: #f8fafc;
  --muted: #94a3b8;
  --paper: #000000;
  --card: #0c0c0c;
  --line: #222222;
  --blue: #3b82f6;
  --cyan: #38bdf8;
  --yellow: #eab308;
  --red: #ef4444;
  --green: #22c55e;
  color-scheme: dark;
}

* { box-sizing: border-box; border-radius: 0 !important; }

body { margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink); line-height: 1.5; }
button, input, textarea, select { font: inherit; }

/* Topbar Institucional */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  padding: 0 max(20px, calc((100vw - 1180px)/2));
  gap: 20px;
}

.brand {
  border: 0;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  margin-right: auto;
  padding: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: #0f172a;
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

[data-theme="dark"] .brand-mark {
  background: #ffffff;
  color: #000000;
}

.brand b { font-size: 1rem; letter-spacing: -0.01em; display: block; font-weight: 800; }
.brand small { display: block; color: var(--muted); font-size: 0.72rem; }

.topbar nav { display: flex; gap: 2px; }
.topbar nav button {
  border: 0;
  background: transparent;
  padding: 8px 12px;
  color: var(--muted);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.86rem;
  transition: background 0.12s ease, color 0.12s ease;
}
.topbar nav button:hover {
  background: var(--paper);
  color: var(--ink);
}
.topbar nav button.active {
  background: var(--paper);
  color: var(--blue);
  font-weight: 700;
}

.menu { display: none; border: 0; background: transparent; font-size: 1.3rem; cursor: pointer; color: var(--ink); }

/* Shell & Container */
.shell { max-width: 1180px; margin: auto; padding: 28px 20px 60px; }
.narrow { max-width: 860px; }

.eyebrow { text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; color: var(--blue); font-size: 0.72rem; display: inline-block; margin-bottom: 4px; }

/* Bloco de Apresentação (Estilo Institucional / Portal de Provas) */
.hero { display: grid; grid-template-columns: 1.4fr 0.6fr; gap: 20px; align-items: stretch; margin-bottom: 24px; }

.hero-main { background: #0f172a; color: #ffffff; padding: 32px; border: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; }
.hero-main h1 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); line-height: 1.15; margin: 8px 0 14px; font-weight: 800; letter-spacing: -0.02em; color: #ffffff; }
.hero-main p { color: #cbd5e1; font-size: 0.96rem; line-height: 1.6; margin: 0; }

.date-card { background: #fef08a; padding: 28px; display: flex; flex-direction: column; justify-content: space-between; color: #422006; border: 1px solid #facc15; }
.date-card strong { font-size: 4rem; line-height: 1; font-weight: 900; color: #1e1b4b; }
.date-card b { font-size: 1.15rem; display: block; margin-bottom: 4px; font-weight: 800; }
.date-card p { color: #713f12; margin: 0; line-height: 1.45; font-size: 0.88rem; }

.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }

/* Botões Sólidos e Diretos */
.btn { border: 1px solid transparent; padding: 10px 16px; font-weight: 700; cursor: pointer; background: var(--blue); color: #fff; transition: background 0.12s; display: inline-flex; align-items: center; gap: 6px; text-decoration: none; font-size: 0.88rem; }
.btn:hover { background: #1e40af; }
.btn.light { background: #ffffff; color: #0f172a; border-color: #cbd5e1; }
.btn.light:hover { background: #f1f5f9; }
.btn.ghost { background: transparent; color: #ffffff; border-color: #475569; }
.btn.ghost:hover { background: rgba(255,255,255,0.08); }
.btn.warn { background: #eab308; color: #000000; font-weight: 800; }
.btn.warn:hover { background: #ca8a04; }
.btn.danger { background: #fee2e2; color: var(--red); border-color: #fca5a5; }
.btn.danger:hover { background: #fecaca; }
.btn.sm { padding: 6px 12px; font-size: 0.8rem; }

/* Capa de Entrada / Welcome Gate (Acesso Restrito após Login) */
.welcome-cover {
  max-width: 980px;
  margin: 30px auto;
  padding: 40px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  text-align: center;
}

.welcome-badge {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  padding: 5px 12px;
  margin-bottom: 16px;
}

[data-theme="dark"] .welcome-badge {
  background: #081b36;
  border-color: #1e3a8a;
  color: #60a5fa;
}

.welcome-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 14px;
  color: var(--ink);
}

.welcome-desc {
  max-width: 720px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--muted);
}

.welcome-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #0f172a;
  color: #ffffff;
  border: 1px solid #0f172a;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s, background 0.12s;
  text-decoration: none;
}
.welcome-cta:hover {
  background: #1e293b;
  transform: translateY(-1px);
}

[data-theme="dark"] .welcome-cta {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}
[data-theme="dark"] .welcome-cta:hover {
  background: #f1f5f9;
}

.welcome-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 36px;
  text-align: left;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.welcome-feature-card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 18px 16px;
}
.welcome-feature-card b {
  display: block;
  font-size: 0.94rem;
  color: var(--ink);
  margin-bottom: 6px;
  font-weight: 700;
}
.welcome-feature-card p {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.45;
  margin: 0;
}

@media (max-width: 768px) {
  .welcome-features { grid-template-columns: repeat(2, 1fr); }
  .welcome-cover { padding: 24px 16px; }
}

@media (max-width: 480px) {
  .welcome-features { grid-template-columns: 1fr; }
}

/* Grid Cards (Padrão Ficha de Estudo) */
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); padding: 18px; }
button.card { text-align: left; color: inherit; cursor: pointer; transition: border-color 0.12s, background 0.12s; display: flex; flex-direction: column; width: 100%; }
button.card:hover { border-color: var(--blue); }
.card h3 { margin: 2px 0 6px; font-size: 1.08rem; letter-spacing: -0.01em; font-weight: 700; }
.card p, .muted { color: var(--muted); line-height: 1.5; font-size: 0.88rem; margin: 0; }
.card small { color: var(--muted); font-size: 0.8rem; }
.span2 { grid-column: span 2; }
.span4 { grid-column: span 4; }

.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin: 8px 0 20px; flex-wrap: wrap; }
.section-head h1, .section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 2px 0 0; letter-spacing: -0.02em; font-weight: 800; }
.section-head p { max-width: 660px; margin: 4px 0 0; color: var(--muted); line-height: 1.5; font-size: 0.92rem; }

/* Day Tabs */
.day-tabs { display: flex; gap: 4px; margin: 16px 0; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.day-tabs button { border: 1px solid var(--line); background: var(--card); padding: 8px 16px; font-weight: 700; font-size: 0.85rem; cursor: pointer; color: var(--muted); transition: all 0.12s; }
.day-tabs button.active { background: var(--ink); color: var(--card); border-color: var(--ink); }

/* Bloco de Questão e Opções (Padrão Caderno de Prova) */
.question { background: var(--card); border: 1px solid var(--line); padding: 20px; margin: 12px 0; }
.question h3 { font-size: 1rem; line-height: 1.6; margin: 6px 0 14px; font-weight: 500; }
.options { display: grid; gap: 8px; }
.option { border: 1px solid var(--line); background: var(--card); padding: 11px 14px; text-align: left; cursor: pointer; font-size: 0.92rem; line-height: 1.45; color: var(--ink); display: flex; align-items: center; gap: 10px; transition: border-color 0.12s; }
.option:hover { border-color: var(--blue); }
.option.selected { border-color: var(--blue); background: #eff6ff; }
.option.correct { border-color: var(--green); background: #f0fdf4; color: #166534; font-weight: 600; }
.option.wrong { border-color: var(--red); background: #fef2f2; color: #991b1b; }

.opt-circle { width: 24px; height: 24px; background: #e2e8f0; display: grid; place-items: center; font-weight: 800; font-size: 0.78rem; flex-shrink: 0; color: #0f172a; }

.feedback { margin-top: 12px; padding: 14px; background: #f8fafc; border: 1px solid var(--line); line-height: 1.55; font-size: 0.9rem; }

.progressbar { height: 6px; background: #e2e8f0; overflow: hidden; }
.progressbar i { display: block; height: 100%; background: var(--blue); transition: width 0.2s ease; }

.stat { font-size: 1.8rem; font-weight: 800; margin: 4px 0; line-height: 1; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }

/* Laboratório de Redação */
.essay-layout { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 16px; align-items: start; }

.prompt-list { display: grid; gap: 6px; }
.prompt-list button { border: 1px solid var(--line); background: var(--card); padding: 12px; text-align: left; cursor: pointer; transition: border-color 0.12s; }
.prompt-list button:hover { border-color: var(--blue); }
.prompt-list button.active { border-color: var(--blue); border-left: 4px solid var(--blue); }
.prompt-list button b { display: block; font-size: 0.9rem; color: var(--ink); margin-bottom: 2px; }
.prompt-list button small { color: var(--muted); font-size: 0.76rem; }

.writer { background: var(--card); border: 1px solid var(--line); padding: 22px; }
.writer textarea { width: 100%; min-height: 460px; border: 1px solid var(--line); padding: 14px; resize: vertical; line-height: 1.65; color: var(--ink); font-size: 0.96rem; font-family: inherit; background: var(--card); }
.writer textarea:focus { outline: 1px solid var(--blue); border-color: var(--blue); }

.counter { display: flex; justify-content: space-between; gap: 12px; margin: 10px 0 14px; color: var(--muted); font-size: 0.82rem; font-weight: 600; }

.checks { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.checks label { background: #f1f5f9; padding: 8px 12px; font-size: 0.82rem; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; border: 1px solid var(--line); }
.checks label input { accent-color: var(--blue); }

.score { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; font-weight: 700; font-size: 0.82rem; }
.score.ok { background: #dcfce7; color: #15803d; }
.score.bad { background: #fee2e2; color: #b91c1c; }

/* Grade de Avaliação da Redação (Espelho Oficial Inep) */
.eval-card { background: var(--card); border: 1px solid var(--line); padding: 22px; margin-top: 20px; }
.eval-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-bottom: 14px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.eval-total-score { font-size: 2.5rem; font-weight: 900; line-height: 1; color: var(--blue); }

.competency-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: 0.88rem; }
.competency-table td, .competency-table th { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.competency-table th { background: #f8fafc; font-size: 0.74rem; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.comp-badge { padding: 3px 8px; font-weight: 700; font-size: 0.82rem; display: inline-block; }
.comp-badge.full { background: #dcfce7; color: #15803d; }
.comp-badge.mid { background: #fef9c3; color: #854d0e; }
.comp-badge.low { background: #fee2e2; color: #b91c1c; }

.diagnostic-box { background: #f8fafc; border: 1px solid var(--line); padding: 14px 16px; margin-bottom: 12px; }
.diagnostic-box h4 { margin: 0 0 6px; font-size: 0.94rem; font-weight: 700; }
.diagnostic-box.good { border-left: 4px solid var(--green); }
.diagnostic-box.warn { border-left: 4px solid var(--yellow); }
.diagnostic-box.action { border-left: 4px solid var(--blue); background: #f0fdf4; }

.element-pill-list { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.element-pill { padding: 4px 10px; font-size: 0.78rem; font-weight: 700; display: inline-flex; align-items: center; gap: 4px; border: 1px solid transparent; }
.element-pill.ok { background: #dcfce7; color: #15803d; border-color: #86efac; }
.element-pill.missing { background: #fee2e2; color: #b91c1c; border-color: #fca5a5; }

.callout { border-left: 3px solid var(--yellow); background: #fefce8; padding: 12px 14px; color: #713f12; line-height: 1.45; font-size: 0.86rem; }

.empty { text-align: center; padding: 40px 16px; background: var(--card); border: 1px dashed var(--line); }
.empty h2 { margin: 6px 0; font-size: 1.3rem; }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.auth-box { display: flex; align-items: center; }
.btn-google { display: inline-flex; align-items: center; gap: 6px; background: var(--card); color: var(--ink); border: 1px solid var(--line); padding: 6px 12px; font-size: 0.8rem; font-weight: 700; cursor: pointer; }
.btn-google:hover { background: var(--paper); }
.user-profile { display: inline-flex; align-items: center; gap: 6px; background: var(--card); border: 1px solid var(--line); padding: 2px 8px; }
.user-avatar { width: 24px; height: 24px; object-fit: cover; background: #94a3b8; }
.user-name { font-size: 0.8rem; font-weight: 700; color: var(--ink); max-width: 80px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sync-badge { font-size: 0.68rem; font-weight: 700; padding: 3px 6px; background: #dcfce7; color: #15803d; border: 0; }
.sync-badge.pending { background: #fef9c3; color: #854d0e; }
.btn-logout { border: 0; background: transparent; color: var(--muted); font-size: 0.72rem; font-weight: 600; cursor: pointer; padding: 2px 4px; }
.btn-logout:hover { color: var(--red); }

.btn-admin-nav { display: inline-flex; align-items: center; gap: 4px; background: var(--ink); color: #fff; padding: 5px 10px; font-size: 0.76rem; font-weight: 700; text-decoration: none; }

.auth-modal-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 16px; }
.auth-modal { background: var(--card); max-width: 480px; width: 100%; padding: 22px; border: 1px solid var(--line); }
.auth-modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.auth-modal-close { border: 0; background: transparent; font-size: 1.4rem; cursor: pointer; color: var(--muted); line-height: 1; }

#toast { position: fixed; right: 16px; bottom: 16px; background: #0f172a; color: #ffffff; padding: 12px 16px; z-index: 9999; display: none; font-size: 0.88rem; font-weight: 600; border: 1px solid #334155; }

footer { max-width: 1180px; margin: 0 auto; padding: 20px 20px 36px; color: var(--muted); display: flex; justify-content: space-between; font-size: 0.78rem; border-top: 1px solid var(--line); }

/* Módulo de Ensino Pedagógico dos Erros no Relatório */
.lesson-box {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-left: 4px solid var(--red);
  padding: 16px;
  margin-top: 14px;
}

.lesson-box.correct {
  border-left-color: var(--green);
  background: #f0fdf4;
}

.lesson-step {
  margin-bottom: 12px;
  font-size: 0.88rem;
  line-height: 1.55;
}
.lesson-step:last-child {
  margin-bottom: 0;
}

.lesson-step-title {
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--blue);
  display: block;
  margin-bottom: 3px;
}

.lesson-step-title.warn {
  color: #b91c1c;
}

.lesson-step-title.success {
  color: #15803d;
}

.filter-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 16px 0;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.filter-btn {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 8px 14px;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--muted);
  transition: all 0.12s;
}

.filter-btn:hover {
  border-color: var(--blue);
  color: var(--ink);
}

.filter-btn.active {
  background: var(--ink);
  color: var(--card);
  border-color: var(--ink);
}

.theme-toggle { border: 0; background: transparent; cursor: pointer; padding: 6px; color: var(--muted); font-size: 1.1rem; display: grid; place-items: center; }
.theme-toggle:hover { color: var(--ink); }

/* ==========================================================================
   MODO ESCURO INSTITUCIONAL (PRETO ABSOLUTO, TEXTO BRANCO E CONTRASTE ALTO)
   ========================================================================== */
[data-theme="dark"] body { background: #000000; color: #f8fafc; }
[data-theme="dark"] .topbar { background: #000000; border-bottom-color: #222222; }
[data-theme="dark"] .topbar nav button:hover { background: #141414; color: #ffffff; }
[data-theme="dark"] .topbar nav button.active { background: #141414; color: #3b82f6; }
[data-theme="dark"] .topbar nav { background: #000000; border-color: #222222; }

[data-theme="dark"] .hero-main { background: #0a0a0a; border-color: #222222; color: #ffffff; }
[data-theme="dark"] .hero-main h1 { color: #ffffff; }
[data-theme="dark"] .hero-main p { color: #94a3b8; }

[data-theme="dark"] .date-card { background: #121004; border-color: #3b3104; color: #fde047; }
[data-theme="dark"] .date-card strong { color: #facc15; }
[data-theme="dark"] .date-card b { color: #ffffff; }
[data-theme="dark"] .date-card p { color: #ca8a04; }

[data-theme="dark"] .card { background: #0a0a0a; border-color: #222222; color: #ffffff; }
[data-theme="dark"] button.card:hover { border-color: #444444; background: #111111; }

[data-theme="dark"] .day-tabs { border-bottom-color: #222222; }
[data-theme="dark"] .day-tabs button { background: #0a0a0a; border-color: #222222; color: #94a3b8; }
[data-theme="dark"] .day-tabs button.active { background: #ffffff; color: #000000; border-color: #ffffff; }

[data-theme="dark"] .question,
[data-theme="dark"] .writer,
[data-theme="dark"] .empty { background: #0a0a0a; border-color: #222222; color: #ffffff; }

[data-theme="dark"] .option { background: #0a0a0a; border-color: #222222; color: #ffffff; }
[data-theme="dark"] .option:hover { border-color: #444444; background: #121212; }
[data-theme="dark"] .option.selected { background: #141414; border-color: #3b82f6; }
[data-theme="dark"] .option.correct { background: #052212; border-color: #22c55e; color: #4ade80; }
[data-theme="dark"] .option.wrong { background: #26080a; border-color: #ef4444; color: #f87171; }

[data-theme="dark"] .opt-circle { background: #1e1e1e; color: #ffffff; }
[data-theme="dark"] .feedback { background: #0d0d0d; border-color: #222222; color: #e2e8f0; }

[data-theme="dark"] .writer textarea { background: #050505; border-color: #222222; color: #ffffff; }
[data-theme="dark"] .writer textarea:focus { border-color: #3b82f6; background: #080808; }
[data-theme="dark"] .checks label { background: #121212; border-color: #222222; color: #ffffff; }

[data-theme="dark"] .prompt-list button { background: #0a0a0a; border-color: #222222; color: #ffffff; }
[data-theme="dark"] .prompt-list button.active { background: #141414; border-color: #3b82f6; border-left: 4px solid #3b82f6; }
[data-theme="dark"] .prompt-list button b { color: #ffffff; }

[data-theme="dark"] .score.ok { background: #052212; color: #4ade80; }
[data-theme="dark"] .score.bad { background: #26080a; color: #f87171; }

[data-theme="dark"] .eval-card { background: #0a0a0a; border-color: #222222; }
[data-theme="dark"] .competency-table th { background: #121212; color: #94a3b8; border-bottom-color: #222222; }
[data-theme="dark"] .competency-table td { border-bottom-color: #222222; color: #ffffff; }

[data-theme="dark"] .comp-badge.full { background: #052212; color: #4ade80; }
[data-theme="dark"] .comp-badge.mid { background: #261e05; color: #facc15; }
[data-theme="dark"] .comp-badge.low { background: #26080a; color: #f87171; }

[data-theme="dark"] .diagnostic-box { background: #0d0d0d; border-color: #222222; color: #ffffff; }
[data-theme="dark"] .diagnostic-box.action { background: #081528; border-color: #1e3a8a; }

[data-theme="dark"] .element-pill.ok { background: #052212; color: #4ade80; border-color: #166534; }
[data-theme="dark"] .element-pill.missing { background: #26080a; color: #f87171; border-color: #991b1b; }

[data-theme="dark"] .callout { background: #181504; border-left-color: #eab308; color: #fde047; }

[data-theme="dark"] .btn.light { background: #121212; color: #ffffff; border-color: #2e2e2e; }
[data-theme="dark"] .btn.light:hover { background: #1a1a1a; }
[data-theme="dark"] .btn.ghost { background: transparent; color: #ffffff; border-color: #333333; }
[data-theme="dark"] .btn.ghost:hover { background: #141414; }
[data-theme="dark"] .btn.danger { background: #26080a; color: #f87171; border-color: #450a0a; }

[data-theme="dark"] .btn-google { background: #0a0a0a; color: #ffffff; border-color: #222222; }
[data-theme="dark"] .btn-google:hover { background: #141414; }
[data-theme="dark"] .user-profile { background: #121212; border-color: #222222; }
[data-theme="dark"] .user-name { color: #ffffff; }
[data-theme="dark"] .sync-badge { background: #052212; color: #4ade80; }
[data-theme="dark"] .sync-badge.pending { background: #261e05; color: #facc15; }
[data-theme="dark"] .btn-admin-nav { background: #222222; color: #ffffff; }

[data-theme="dark"] .auth-modal { background: #0a0a0a; border-color: #222222; color: #ffffff; }
[data-theme="dark"] #toast { background: #ffffff; color: #000000; border-color: #e2e8f0; }

[data-theme="dark"] footer { border-top-color: #222222; color: #64748b; }
[data-theme="dark"] .progressbar { background: #1e1e1e; }
[data-theme="dark"] select { background: #0a0a0a !important; color: #ffffff !important; border-color: #222222 !important; }

[data-theme="dark"] .lesson-box { background: #0d0d0d; border-color: #222222; }
[data-theme="dark"] .lesson-box.correct { background: #052212; border-left-color: #22c55e; }
[data-theme="dark"] .filter-bar { border-bottom-color: #222222; }
[data-theme="dark"] .filter-btn { background: #0a0a0a; border-color: #222222; color: #94a3b8; }
[data-theme="dark"] .filter-btn:hover { border-color: #444444; color: #ffffff; }
[data-theme="dark"] .filter-btn.active { background: #ffffff; color: #000000; border-color: #ffffff; }

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 860px) {
  .topbar { padding: 0 16px; }
  .menu { display: block; }
  .topbar nav { display: none; position: absolute; top: 64px; left: 12px; right: 12px; background: var(--card); border: 1px solid var(--line); padding: 8px; flex-direction: column; }
  .topbar nav.open { display: flex; }
  .hero { grid-template-columns: 1fr; }
  .date-card { min-height: 180px; }
  .grid, .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .topic-grid, .essay-layout { grid-template-columns: 1fr; }
  .span2 { grid-column: span 2; }
}

@media (max-width: 520px) {
  .brand b { font-size: 0.88rem; }
  .brand small { font-size: 0.68rem; }
  .shell { padding: 18px 12px 40px; }
  .hero-main, .date-card { padding: 20px; }
  .grid, .metric-grid { grid-template-columns: 1fr; }
  .span2 { grid-column: auto; }
  .actions .btn { flex: 1; }
}