/* ═══════════════════════════════════════════════════════
   DevBook — Design System completo
   Temas: light (padrão) + dark · Paleta Grafite (neutra)
   ═══════════════════════════════════════════════════════ */

:root {
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Fraunces', Georgia, serif;
  --radius: 14px;
  --radius-sm: 9px;
  --sidebar-w: 300px;
  --topbar-h: 60px;
  --shadow: 0 8px 30px rgba(24, 28, 38, .10);
  --shadow-lg: 0 20px 50px rgba(24, 28, 38, .14);
  --transition: .22s cubic-bezier(.4,0,.2,1);
  --transition-spring: .35s cubic-bezier(.34,1.56,.64,1);
}

/* ─── Tema claro (padrão) · Grafite ─── */
[data-theme="light"] {
  --bg: #f6f7f9;
  --bg-2: #ffffff;
  --bg-3: #eceef2;
  --surface: #ffffff;
  --surface-2: #f2f4f7;
  --border: #dde1e8;
  --text: #171a21;
  --text-2: #4a5163;
  --text-3: #838b9e;
  --primary: #3d4557;
  --primary-strong: #262c38;
  --primary-soft: rgba(61, 69, 87, .09);
  --primary-glow: rgba(61, 69, 87, .22);
  --accent: #b45309;
  --accent-soft: rgba(180, 83, 9, .12);
  --success: #15803d;
  --success-soft: rgba(21, 128, 61, .11);
  --danger: #b91c1c;
  --danger-soft: rgba(185, 28, 28, .09);
  --purple: #6d28d9;
  --purple-soft: rgba(109, 40, 217, .11);
  --code-bg: #f7f8fa;
  --scroll: #c2c8d4;
  --focus-ring: 0 0 0 3px rgba(61, 69, 87, .32);
}

/* ─── Tema escuro · Grafite ─── */
[data-theme="dark"] {
  --bg: #14161c;
  --bg-2: #1b1e26;
  --bg-3: #232732;
  --surface: #1b1e26;
  --surface-2: #232732;
  --border: #313745;
  --text: #e8eaef;
  --text-2: #a3abbd;
  --text-3: #6f788c;
  --primary: #c3c9d6;
  --primary-strong: #e2e6ee;
  --primary-soft: rgba(195, 201, 214, .14);
  --primary-glow: rgba(195, 201, 214, .28);
  --accent: #f0b429;
  --accent-soft: rgba(240, 180, 41, .16);
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, .15);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, .13);
  --purple: #a78bfa;
  --purple-soft: rgba(167, 139, 250, .16);
  --code-bg: #101318;
  --scroll: #3a4152;
  --focus-ring: 0 0 0 3px rgba(195, 201, 214, .4);
  --shadow: 0 8px 30px rgba(0,0,0,.45);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.55);
}

/* ─── Reset ─── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font: inherit; color: inherit; }
a { color: var(--primary); text-decoration: none; }
::selection { background: var(--primary); color: var(--bg); }

/* Scrollbar */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scroll); border-radius: 6px; }

.hidden { display: none !important; }
.only-mobile { display: none; }

/* ═══════════ TOASTS ═══════════ */
#toastZone {
  position: fixed; top: 18px; right: 18px; z-index: 9999;
  display: flex; flex-direction: column; gap: 10px; pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: var(--surface); border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  padding: 12px 18px; border-radius: var(--radius-sm);
  box-shadow: var(--shadow); font-size: .88rem; font-weight: 500;
  animation: toastIn .3s ease both; max-width: 320px;
}
.toast.xp { border-left-color: var(--accent); }
.toast.success { border-left-color: var(--success); }
.toast.danger { border-left-color: var(--danger); }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: none; } }
.toast.out { animation: toastOut .3s ease both; }
@keyframes toastOut { to { opacity: 0; transform: translateX(40px); } }

/* ═══════════ SIDEBAR ═══════════ */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: var(--sidebar-w); z-index: 500;
  background: var(--bg-2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: transform var(--transition);
}
.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 18px 14px; border-bottom: 1px solid var(--border);
}
.brand-logo { font-size: 1.7rem; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; flex: 1; }
.brand-text strong { font-family: var(--font-display); font-size: 1.25rem; letter-spacing: -.02em; }
.brand-text span { font-size: .72rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .12em; }

.sidebar-profile {
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.profile-row { display: flex; gap: 12px; align-items: center; }
.profile-avatar {
  width: 44px; height: 44px; border-radius: 12px; font-size: 1.4rem;
  background: var(--primary-soft); display: grid; place-items: center;
  border: 1px solid var(--border); flex-shrink: 0;
}
.profile-info { flex: 1; min-width: 0; }
.profile-level { font-size: .78rem; font-weight: 700; color: var(--primary); margin-bottom: 5px; }
.xp-bar { height: 7px; background: var(--bg-3); border-radius: 5px; overflow: hidden; }
.xp-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 5px; transition: width .6s ease; }
.profile-xp { font-size: .68rem; color: var(--text-3); margin-top: 4px; }
.profile-stats { display: flex; gap: 8px; margin-top: 12px; }
.stat {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 5px;
  background: var(--bg-3); border-radius: 8px; padding: 6px 4px;
  font-size: .8rem; font-weight: 700;
}
.stat-ico { font-size: .85rem; }

.sidebar-search { padding: 12px 14px; }
.sidebar-search input {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 14px; font-size: .85rem;
  outline: none; transition: border var(--transition);
}
.sidebar-search input:focus { border-color: var(--primary); }
.sidebar-search input::placeholder { color: var(--text-3); }

/* Sumário */
.toc { flex: 1; overflow-y: auto; padding: 4px 10px 10px; }
.toc-part {
  font-size: .68rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .14em; color: var(--text-3);
  padding: 16px 10px 6px;
}
.toc-item {
  display: flex; align-items: center; gap: 9px; width: 100%;
  padding: 8px 10px; border-radius: 9px; font-size: .84rem;
  color: var(--text-2); text-align: left;
  transition: background var(--transition), color var(--transition);
}
.toc-item:hover { background: var(--surface-2); color: var(--text); }
.toc-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.toc-item .toc-check { width: 17px; text-align: center; font-size: .75rem; opacity: .4; }
.toc-item.done .toc-check { opacity: 1; }
.toc-item.done { color: var(--success); }
.sidebar-foot { padding: 12px 14px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 8px; }
.toc-empty { padding: 18px 12px; color: var(--text-3); font-size: .82rem; text-align: center; }
.toc-item.extra .toc-check { opacity: 1; font-size: .95rem; }
.toc-item.extra { font-weight: 600; }
.sidebar-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 490;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.sidebar-backdrop.show { opacity: 1; pointer-events: auto; }

/* ═══════════ SHELL / TOPBAR ═══════════ */
.shell { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 400; height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.breadcrumb { font-size: .82rem; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.breadcrumb strong { color: var(--text); }

.mini-ring { position: relative; width: 38px; height: 38px; }
.mini-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--bg-3); stroke-width: 3.2; }
.ring-fg {
  fill: none; stroke: var(--primary); stroke-width: 3.2; stroke-linecap: round;
  stroke-dasharray: 100; stroke-dashoffset: 100; transition: stroke-dashoffset .7s ease;
}
.mini-ring span {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: .58rem; font-weight: 800; color: var(--primary);
}

.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  font-size: 1.05rem; background: var(--surface); border: 1px solid var(--border);
  transition: background var(--transition), border var(--transition);
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--primary); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 10px; font-size: .82rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border);
  transition: all var(--transition);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost.small { padding: 6px 10px; font-size: .75rem; width: 100%; justify-content: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 10px 18px; border-radius: 10px; font-size: .86rem; font-weight: 700;
  background: var(--primary); color: var(--bg-2); transition: all var(--transition);
}
.btn-primary:hover { background: var(--primary-strong); transform: translateY(-1px); }
.btn-primary.small { padding: 7px 13px; font-size: .78rem; }

/* No tema escuro o primário é claro: o texto do botão precisa ser escuro */
[data-theme="dark"] .btn-primary { color: #14161c; }

/* ═══════════ VIEW / CONTEÚDO ═══════════ */
.view { flex: 1; width: 100%; max-width: 880px; margin: 0 auto; padding: 34px 24px 60px; outline: none; }

/* — Hero (home) — */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border); border-radius: 22px;
  padding: 44px 38px; margin-bottom: 34px;
}
.hero::after {
  content: '</>'; position: absolute; right: -12px; bottom: -40px;
  font-family: var(--font-mono); font-size: 11rem; font-weight: 700;
  color: var(--primary); opacity: .05; pointer-events: none;
}
.hero .kicker {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: .72rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase;
  color: var(--primary); background: var(--primary-soft);
  padding: 6px 13px; border-radius: 40px; margin-bottom: 16px;
}
.hero h1 {
  font-family: var(--font-display); font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.15; letter-spacing: -.02em; margin-bottom: 14px;
}
.hero h1 em { font-style: normal; color: var(--primary); }
.hero p { color: var(--text-2); max-width: 620px; font-size: 1.02rem; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }

/* — Cards de estatística — */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 34px; }
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; text-align: center;
}
.stat-card .big { font-size: 1.7rem; font-weight: 800; color: var(--primary); font-family: var(--font-mono); }
.stat-card .lbl { font-size: .72rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .08em; margin-top: 4px; }

/* — Seção de partes — */
.part-block { margin-bottom: 40px; }
.part-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.part-num {
  width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 800; font-size: 1rem;
  background: var(--primary-soft); color: var(--primary); border: 1px solid var(--border);
}
.part-head h2 { font-size: 1.25rem; letter-spacing: -.01em; }
.part-head .part-sub { font-size: .8rem; color: var(--text-3); }

.chapter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }
.chapter-card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; text-align: left;
  transition: all var(--transition); overflow: hidden;
  display: flex; flex-direction: column; gap: 8px;
}
.chapter-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow); }
.chapter-card.done { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.chapter-card .cc-icon { font-size: 1.6rem; }
.chapter-card .cc-title { font-weight: 700; font-size: .95rem; line-height: 1.35; }
.chapter-card .cc-desc { font-size: .78rem; color: var(--text-2); flex: 1; }
.chapter-card .cc-meta { display: flex; justify-content: space-between; font-size: .7rem; color: var(--text-3); align-items: center; }
.chapter-card .cc-badge {
  font-size: .62rem; font-weight: 800; padding: 3px 8px; border-radius: 20px;
  text-transform: uppercase; letter-spacing: .06em;
}
.cc-badge.easy { background: var(--success-soft); color: var(--success); }
.cc-badge.medium { background: rgba(251,191,36,.15); color: var(--accent); }
.cc-badge.hard { background: var(--danger-soft); color: var(--danger); }
.chapter-card .cc-status { font-size: .95rem; }

/* — Capítulo: leitura — */
.ch-head { margin-bottom: 30px; padding-bottom: 26px; border-bottom: 1px solid var(--border); }
.ch-part { font-size: .7rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; color: var(--primary); margin-bottom: 10px; }
.ch-head h1 { font-family: var(--font-display); font-size: clamp(1.6rem, 4vw, 2.4rem); line-height: 1.2; letter-spacing: -.02em; margin-bottom: 12px; }
.ch-head .ch-lead { color: var(--text-2); font-size: 1.03rem; }
.ch-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.ch-tag { font-size: .7rem; font-weight: 700; padding: 4px 11px; border-radius: 20px; background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }

/* Blocos de conteúdo */
.content h2 {
  font-size: 1.35rem; margin: 38px 0 14px; letter-spacing: -.01em;
  padding-left: 14px; border-left: 4px solid var(--primary);
}
.content h3 { font-size: 1.08rem; margin: 26px 0 10px; color: var(--primary); }
.content p { margin-bottom: 14px; color: var(--text-2); }
.content p strong, .content li strong { color: var(--text); }
.content ul, .content ol { margin: 0 0 16px 22px; color: var(--text-2); }
.content li { margin-bottom: 7px; }
.content code:not(pre code) {
  font-family: var(--font-mono); font-size: .85em;
  background: var(--code-bg); border: 1px solid var(--border);
  padding: 1.5px 7px; border-radius: 6px; color: var(--primary);
}
.content pre code { color: var(--text); }

/* Callouts */
.callout { border-radius: var(--radius-sm); padding: 16px 18px; margin: 18px 0; font-size: .9rem; border-left: 4px solid; }
.callout .co-title { font-weight: 800; font-size: .78rem; text-transform: uppercase; letter-spacing: .07em; margin-bottom: 6px; display: block; }
.callout.info { background: var(--primary-soft); border-color: var(--primary); }
.callout.info .co-title { color: var(--primary); }
.callout.tip { background: var(--success-soft); border-color: var(--success); }
.callout.tip .co-title { color: var(--success); }
.callout.warn { background: rgba(251,191,36,.1); border-color: var(--accent); }
.callout.warn .co-title { color: var(--accent); }
.callout.danger { background: var(--danger-soft); border-color: var(--danger); }
.callout.danger .co-title { color: var(--danger); }
.callout p { margin-bottom: 0; color: var(--text-2); }

/* Tabela */
.content .table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.content table { width: 100%; border-collapse: collapse; font-size: .87rem; }
.content th { background: var(--surface-2); text-align: left; padding: 12px 15px; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); }
.content td { padding: 11px 15px; border-top: 1px solid var(--border); color: var(--text-2); }
.content tr:hover td { background: var(--surface); }

/* Box de síntese */
.summary-box {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin: 26px 0;
}
.summary-box h3 { margin-top: 0 !important; }
.summary-box ul { margin-bottom: 0; }

/* ═══════════ CODE PLAYGROUND ═══════════ */
.playground {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin: 22px 0; background: var(--surface);
}
.pg-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 14px; background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.pg-tabs { display: flex; gap: 4px; }
.pg-tab {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 600;
  padding: 5px 13px; border-radius: 7px; color: var(--text-3);
  transition: all var(--transition);
}
.pg-tab.active { background: var(--primary-soft); color: var(--primary); }
.pg-actions { display: flex; gap: 6px; }
.pg-btn {
  font-size: .72rem; font-weight: 700; padding: 5px 12px;
  border-radius: 7px; background: var(--primary); color: var(--bg-2);
  transition: all var(--transition);
}
.pg-btn:hover { background: var(--primary-strong); }
.pg-btn.run { background: var(--success); color: #fff; }
[data-theme="dark"] .pg-btn { color: #14161c; }
.pg-body { display: grid; grid-template-columns: 1fr 1fr; min-height: 260px; }
.pg-editor { position: relative; border-right: 1px solid var(--border); }
.pg-editor textarea {
  width: 100%; height: 100%; min-height: 260px; resize: vertical;
  background: var(--code-bg); color: var(--text);
  font-family: var(--font-mono); font-size: .82rem; line-height: 1.6;
  padding: 16px; border: none; outline: none; tab-size: 2;
  white-space: pre; overflow: auto;
}
.pg-preview { background: #fff; position: relative; }
.pg-preview iframe { width: 100%; height: 100%; min-height: 260px; border: none; background: #fff; }
.pg-console {
  grid-column: 1 / -1; background: var(--code-bg); border-top: 1px solid var(--border);
  font-family: var(--font-mono); font-size: .76rem; padding: 10px 14px;
  max-height: 130px; overflow-y: auto; color: var(--text-2); white-space: pre-wrap;
}
.pg-console .log-err { color: var(--danger); }

/* ═══════════ QUIZ ═══════════ */
.quiz-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; margin: 26px 0; }
.quiz-box h3 { display: flex; align-items: center; gap: 9px; margin-bottom: 6px; }
.quiz-q { color: var(--text-2); margin-bottom: 16px; }
.quiz-opts { display: flex; flex-direction: column; gap: 9px; }
.quiz-opt {
  text-align: left; padding: 13px 16px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface-2);
  font-size: .9rem; transition: all var(--transition);
}
.quiz-opt:hover:not(:disabled) { border-color: var(--primary); }
.quiz-opt.correct { border-color: var(--success); background: var(--success-soft); font-weight: 600; }
.quiz-opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.quiz-opt:disabled { cursor: default; }
.quiz-feedback { margin-top: 14px; padding: 13px 16px; border-radius: 10px; font-size: .87rem; display: none; }
.quiz-feedback.show { display: block; animation: toastIn .3s ease both; }
.quiz-feedback.ok { background: var(--success-soft); border-left: 4px solid var(--success); }
.quiz-feedback.no { background: var(--danger-soft); border-left: 4px solid var(--danger); }

/* ═══════════ NAV DE CAPÍTULO ═══════════ */
.chapter-nav {
  position: sticky; bottom: 0; z-index: 300;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  max-width: 880px; margin: 0 auto; width: 100%;
  padding: 14px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}
.btn-nav {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 11px; font-size: .84rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border);
  transition: all var(--transition); max-width: 38%;
}
.btn-nav:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.btn-nav:disabled { opacity: .35; cursor: default; }
.btn-nav span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.btn-complete {
  padding: 11px 22px; border-radius: 11px; font-size: .86rem; font-weight: 800;
  background: var(--primary); color: var(--bg-2); transition: all var(--transition);
  white-space: nowrap;
}
.btn-complete:hover { background: var(--primary-strong); transform: translateY(-1px); }
.btn-complete.done { background: var(--success); color: #fff; }
[data-theme="dark"] .btn-complete { color: #14161c; }
[data-theme="dark"] .btn-complete.done { color: #0f2417; }

/* ═══════════ MODAL ═══════════ */
.modal {
  position: fixed; inset: 0; z-index: 900; display: grid; place-items: center;
  background: rgba(4,8,18,.7); backdrop-filter: blur(6px);
  padding: 20px; animation: toastIn .25s ease both;
}
.modal-card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 20px; width: 100%; max-width: 560px;
  max-height: 85vh; display: flex; flex-direction: column;
  box-shadow: var(--shadow); animation: modalUp .3s ease both;
}
@keyframes modalUp { from { opacity: 0; transform: translateY(26px) scale(.97); } to { opacity: 1; transform: none; } }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 1.05rem; }
.modal-body { padding: 22px; overflow-y: auto; }

/* Flashcards */
.flash-stage { text-align: center; }
.flash-progress { display: flex; gap: 5px; justify-content: center; margin-bottom: 18px; }
.flash-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bg-3); transition: background var(--transition); }
.flash-dot.active { background: var(--primary); }
.flash-dot.ok { background: var(--success); }
.flash-dot.no { background: var(--danger); }
.flash-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 26px; min-height: 170px; display: grid; place-items: center;
  cursor: pointer; transition: all var(--transition); margin-bottom: 18px;
}
.flash-card:hover { border-color: var(--primary); }
.flash-card .fc-face { font-size: 1.06rem; line-height: 1.55; }
.flash-card .fc-label { font-size: .68rem; text-transform: uppercase; letter-spacing: .12em; color: var(--text-3); display: block; margin-bottom: 10px; font-weight: 700; }
.flash-card .fc-answer { color: var(--primary); font-weight: 600; }
.flash-hint { font-size: .78rem; color: var(--text-3); margin-bottom: 14px; }
.flash-rates { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.flash-rate {
  padding: 10px 16px; border-radius: 10px; font-size: .8rem; font-weight: 700;
  border: 1px solid var(--border); background: var(--surface-2); transition: all var(--transition);
}
.flash-rate:hover { transform: translateY(-2px); }
.flash-rate.again { border-color: var(--danger); color: var(--danger); }
.flash-rate.hard { border-color: var(--accent); color: var(--accent); }
.flash-rate.good { border-color: var(--primary); color: var(--primary); }
.flash-rate.easy { border-color: var(--success); color: var(--success); }

/* Badges */
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 13px; }
.badge-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 12px; text-align: center; transition: all var(--transition);
}
.badge-item.locked { opacity: .38; filter: grayscale(1); }
.badge-item .b-ico { font-size: 2rem; display: block; margin-bottom: 8px; }
.badge-item .b-name { font-size: .8rem; font-weight: 700; }
.badge-item .b-desc { font-size: .68rem; color: var(--text-3); margin-top: 3px; }

/* ═══════════ FOOTER / PWA ═══════════ */
.foot { text-align: center; padding: 26px 20px 34px; color: var(--text-3); font-size: .78rem; border-top: 1px solid var(--border); }
.badge-offline { background: var(--success-soft); color: var(--success); font-weight: 700; padding: 2px 8px; border-radius: 20px; font-size: .7rem; }

.pwa-bar {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  z-index: 800; display: flex; align-items: center; gap: 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 40px; padding: 11px 14px 11px 22px;
  box-shadow: var(--shadow); font-size: .84rem; font-weight: 600;
  animation: toastIn .4s ease both; max-width: calc(100vw - 30px);
}
.pwa-bar .icon-btn { width: 30px; height: 30px; font-size: .8rem; }

/* ═══════════ RESPONSIVO ═══════════ */
@media (max-width: 980px) {
  .pg-body { grid-template-columns: 1fr; }
  .pg-editor { border-right: none; border-bottom: 1px solid var(--border); }
}
@media (max-width: 860px) {
  .only-mobile { display: grid; }
  .hide-sm { display: none; }
  .sidebar { transform: translateX(-100%); box-shadow: none; }
  .sidebar.open { transform: none; box-shadow: var(--shadow); }
  .shell { margin-left: 0; }
  .view { padding: 24px 16px 40px; }
  .hero { padding: 30px 22px; }
  .btn-nav { max-width: 30%; padding: 10px 10px; font-size: .76rem; }
  .btn-complete { padding: 10px 13px; font-size: .78rem; }
  .chapter-grid { grid-template-columns: 1fr; }
  .pwa-bar span { display: none; }
  .cta-grid { grid-template-columns: 1fr 1fr; }
  .quick-nav { padding: 10px 16px; overflow-x: auto; }
}

/* ═══════════════════════════════════════════════════════
   v2.0 — NAV RÁPIDA DE SEÇÕES
   ═══════════════════════════════════════════════════════ */
.quick-nav {
  position: sticky; top: var(--topbar-h); z-index: 350;
  display: flex; gap: 8px; justify-content: center;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.quick-nav-item {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 40px; font-size: .84rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-2); white-space: nowrap;
  transition: all var(--transition);
}
.quick-nav-item:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.quick-nav-item.active { background: var(--primary); border-color: var(--primary); color: var(--bg-2); box-shadow: var(--shadow); }
[data-theme="dark"] .quick-nav-item.active { color: #14161c; }
.qn-ico { font-size: 1rem; }

/* ═══════════════════════════════════════════════════════
   v2.0 — CTA CARDS DA HOME
   ═══════════════════════════════════════════════════════ */
.home-cta { margin: 8px 0 40px; }
.home-cta h2 {
  font-family: var(--font-display); font-size: 1.5rem; letter-spacing: -.01em;
  margin-bottom: 18px;
}
.cta-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.cta-card {
  text-align: left; padding: 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 7px;
  transition: all var(--transition); position: relative; overflow: hidden;
}
.cta-card::after {
  content: ""; position: absolute; inset: auto auto -40px -40px;
  width: 120px; height: 120px; border-radius: 50%;
  background: var(--primary-soft); opacity: .5; transition: transform var(--transition);
}
.cta-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.cta-card:hover::after { transform: scale(1.4); }
.cta-ico { font-size: 1.8rem; position: relative; z-index: 1; }
.cta-card strong { font-size: 1rem; position: relative; z-index: 1; }
.cta-card > span:last-child { font-size: .8rem; color: var(--text-2); line-height: 1.55; position: relative; z-index: 1; }
.cta-card.purple::after   { background: var(--purple-soft); }
.cta-card.accent::after   { background: var(--accent-soft); }
.cta-card.success::after  { background: var(--success-soft); }

/* ═══════════════════════════════════════════════════════
   v2.0 — TRILHAS DE CARREIRA
   ═══════════════════════════════════════════════════════ */
.tracks-grid { display: grid; gap: 18px; }
.track-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
  position: relative; overflow: hidden;
}
.track-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: var(--primary);
}
.track-card.purple::before { background: var(--purple); }
.track-card.accent::before  { background: var(--accent); }
.track-card.success::before { background: var(--success); }
.track-card.complete { border-color: var(--success); }

.track-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.track-badge {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--primary-soft); border: 1px solid var(--border);
}
.track-head h3 { font-size: 1.15rem; letter-spacing: -.01em; margin-bottom: 3px; }
.track-head p { font-size: .84rem; color: var(--text-2); }
.track-finish {
  margin-left: auto; flex-shrink: 0; font-size: .7rem; font-weight: 800;
  padding: 6px 12px; border-radius: 20px; letter-spacing: .04em;
  background: var(--success-soft); color: var(--success);
  text-transform: uppercase;
}

.track-pct { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.track-bar { flex: 1; height: 9px; background: var(--bg-3); border-radius: 6px; overflow: hidden; }
.track-bar span {
  display: block; height: 100%; border-radius: 6px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width .7s ease;
}
.track-card.purple .track-bar span { background: linear-gradient(90deg, var(--purple), var(--primary)); }
.track-card.accent .track-bar span  { background: linear-gradient(90deg, var(--accent), var(--success)); }
.track-pct strong { font-family: var(--font-mono); font-size: .85rem; color: var(--primary); }

.track-counts { display: flex; gap: 18px; font-size: .8rem; color: var(--text-2); margin-bottom: 16px; flex-wrap: wrap; }

.track-details { border-top: 1px solid var(--border); padding-top: 16px; }
.track-details > summary, .proj-details > summary, .chal-hint > summary, .chal-how > summary {
  cursor: pointer; font-size: .85rem; font-weight: 700; color: var(--primary);
  list-style: none; display: flex; align-items: center; gap: 7px;
  padding: 4px 0; user-select: none;
}
.track-details > summary::-webkit-details-marker,
.proj-details > summary::-webkit-details-marker { display: none; }
.track-details > summary::before,
.proj-details > summary::before { content: "▸"; transition: transform var(--transition); display: inline-block; }
details[open] > summary::before { transform: rotate(90deg); }
.track-details h4 {
  font-size: .74rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-3); margin: 20px 0 10px;
}

.track-list { list-style: none; display: flex; flex-direction: column; gap: 5px; }
.track-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 12px; border-radius: 9px; text-align: left;
  font-size: .85rem; color: var(--text-2);
  background: var(--surface-2); border: 1px solid transparent;
  transition: all var(--transition);
}
.track-item:hover { border-color: var(--primary); color: var(--text); }
.track-item.done { color: var(--success); background: var(--success-soft); }
.track-ck { width: 14px; text-align: center; font-size: .7rem; opacity: .6; }
.track-item.done .track-ck { opacity: 1; }
.track-ico { font-size: 1rem; }
.track-name { flex: 1; min-width: 0; }
.track-tag { font-size: .6rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; opacity: .8; }

.skill-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-chip {
  font-size: .74rem; font-weight: 600; padding: 6px 13px; border-radius: 20px;
  background: var(--primary-soft); color: var(--primary-strong); border: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════════════
   v2.0 — PROJETOS INTEGRADORES
   ═══════════════════════════════════════════════════════ */
.projects-grid { display: grid; gap: 18px; }
.proj-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px;
}
.proj-card.done { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.proj-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 14px; }
.proj-icon {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--accent-soft); border: 1px solid var(--border);
}
.proj-head h3 { font-size: 1.15rem; margin-bottom: 6px; letter-spacing: -.01em; }
.proj-meta { display: flex; gap: 12px; align-items: center; font-size: .76rem; color: var(--text-3); flex-wrap: wrap; }
.proj-done {
  margin-left: auto; flex-shrink: 0; font-size: .7rem; font-weight: 800;
  padding: 6px 12px; border-radius: 20px; text-transform: uppercase;
  background: var(--success-soft); color: var(--success);
}
.proj-brief { font-size: .92rem; color: var(--text-2); margin-bottom: 14px; line-height: 1.6; }
.proj-stack { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.stack-chip {
  font-family: var(--font-mono); font-size: .7rem; font-weight: 600;
  padding: 4px 10px; border-radius: 6px;
  background: var(--code-bg); border: 1px solid var(--border); color: var(--text-2);
}
.proj-details { border-top: 1px solid var(--border); padding-top: 14px; }
.proj-details h4 {
  font-size: .74rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-3); margin: 20px 0 10px;
}
.req-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.req-item {
  display: flex; gap: 13px; padding: 13px 15px; border-radius: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
}
.req-pts {
  flex-shrink: 0; font-family: var(--font-mono); font-size: .72rem; font-weight: 700;
  color: var(--primary); background: var(--primary-soft);
  padding: 3px 9px; border-radius: 6px; height: fit-content; align-self: flex-start;
}
.req-item strong { font-size: .88rem; display: block; margin-bottom: 3px; }
.req-item p { font-size: .82rem; color: var(--text-2); line-height: 1.55; }
.bonus-list, .tip-list { margin-left: 4px; }
.bonus-list li, .tip-list li { font-size: .84rem; color: var(--text-2); margin-bottom: 7px; }
.proj-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.proj-actions .btn-ghost.small { width: auto; }

/* ═══════════════════════════════════════════════════════
   v2.0 — DESAFIOS DE CÓDIGO (lista)
   ═══════════════════════════════════════════════════════ */
.challenges-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }
.challenge-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 9px;
  transition: all var(--transition); position: relative;
}
.challenge-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.challenge-card.done { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); }
.ch-ico { font-size: 2rem; }
.challenge-card h3 { font-size: 1.02rem; letter-spacing: -.01em; }
.ch-desc {
  font-size: .82rem; color: var(--text-2); line-height: 1.55; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3;
  -webkit-box-orient: vertical; overflow: hidden;
}
.ch-meta { display: flex; align-items: center; gap: 10px; font-size: .74rem; color: var(--text-3); flex-wrap: wrap; }
.ch-xp { font-family: var(--font-mono); font-weight: 700; color: var(--accent); }
.challenge-card .btn-primary { align-self: flex-start; }
.ch-check {
  position: absolute; top: 18px; right: 18px;
  font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em;
  background: var(--success-soft); color: var(--success);
  padding: 4px 10px; border-radius: 20px;
}

/* ═══════════════════════════════════════════════════════
   v2.0 — MODAL DE DESAFIO
   ═══════════════════════════════════════════════════════ */
.modal-wide { max-width: 880px; }
.modal-wide .modal-body { max-height: 74vh; }

.chal { display: flex; flex-direction: column; }
.chal-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 16px;
}
.chal-kicker { font-size: .72rem; color: var(--text-3); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.chal-kicker strong { color: var(--accent); font-family: var(--font-mono); }
.chal-head h3 { font-size: 1.3rem; letter-spacing: -.01em; }
.chal-done {
  flex-shrink: 0; font-size: .7rem; font-weight: 800; padding: 6px 12px;
  border-radius: 20px; background: var(--success-soft); color: var(--success);
  text-transform: uppercase;
}

.chal-hint, .chal-how {
  margin-bottom: 16px; padding: 12px 16px;
  background: var(--surface-2); border: 1px dashed var(--border); border-radius: var(--radius-sm);
}
.chal-hint > summary, .chal-how > summary { color: var(--accent); font-size: .8rem; }
.chal-hint p, .chal-how p { font-size: .83rem; color: var(--text-2); margin-top: 9px; line-height: 1.6; }

.chal-pg { margin: 0; }
.chal-body { grid-template-columns: 1fr; }
.chal-console { max-height: 190px; }
.chal-console .log-ok   { color: var(--success); font-weight: 600; }
.chal-console .log-warn { color: var(--accent); }
.chal-console .log-info { color: var(--text-3); }
.chal-footer {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-top: 12px; flex-wrap: wrap;
  font-size: .76rem; color: var(--text-3);
}
.chal-footer kbd {
  font-family: var(--font-mono); font-size: .7rem;
  background: var(--surface-2); border: 1px solid var(--border);
  border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px;
}
.chal-verdict { font-weight: 700; color: var(--primary); }
.chal-frame { display: none; }

/* ═══════════════════════════════════════════════════════
   v2.0 — CERTIFICADO
   ═══════════════════════════════════════════════════════ */
.cert-status {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px;
}
.cert-status-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 22px; flex-wrap: wrap;
}
.cert-status-head h3 { font-size: 1.15rem; }
.cert-flag {
  font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 20px;
}
.cert-flag.ok { background: var(--success-soft); color: var(--success); }
.cert-flag.no { background: var(--accent-soft); color: var(--accent); }

.cert-checks { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 26px; }
.cert-check {
  display: grid; grid-template-columns: 20px 1fr auto; gap: 12px;
  align-items: center; padding: 13px 16px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px;
}
.cert-check.ok { border-color: color-mix(in srgb, var(--success) 45%, var(--border)); background: var(--success-soft); }
.cert-ck { font-size: .85rem; opacity: .5; }
.cert-check.ok .cert-ck { opacity: 1; color: var(--success); }
.cert-label { font-size: .88rem; font-weight: 600; }
.cert-nums { font-family: var(--font-mono); font-size: .8rem; color: var(--text-3); }
.cert-bar { grid-column: 2 / -1; height: 6px; background: var(--bg-3); border-radius: 4px; overflow: hidden; }
.cert-bar i { display: block; height: 100%; background: var(--primary); border-radius: 4px; transition: width .6s ease; }
.cert-check.ok .cert-bar i { background: var(--success); }

.btn-primary:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.cert-note { font-size: .84rem; color: var(--text-2); margin-top: 16px; }
.link-btn { color: var(--primary); font-weight: 700; text-decoration: underline; font-size: inherit; }

/* ═══════════════════════════════════════════════════════
   v2.0 — MODAL DE CONQUISTAS (resumo)
   ═══════════════════════════════════════════════════════ */
.badge-summary {
  font-size: .88rem; color: var(--text-2); margin-bottom: 18px;
  padding-bottom: 14px; border-bottom: 1px solid var(--border);
}
.badge-summary strong { color: var(--primary); }

/* ═══════════════════════════════════════════════════════
   v3 — NAVEGAÇÃO: paleta de comandos, leitura, sumário
   ═══════════════════════════════════════════════════════ */

/* ─── Gatilho da busca na sidebar ─── */
.search-trigger {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 12px;
  transition: all var(--transition); text-align: left;
}
.search-trigger:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.search-trigger .st-ico { font-size: .9rem; }
.search-trigger .st-text { flex: 1; font-size: .83rem; color: var(--text-3); }
.search-trigger kbd {
  font-family: var(--font-mono); font-size: .64rem; font-weight: 700;
  background: var(--surface-2); border: 1px solid var(--border);
  border-bottom-width: 2px; border-radius: 5px; padding: 2px 6px;
  color: var(--text-3); white-space: nowrap;
}
.sidebar-search { display: flex; flex-direction: column; gap: 8px; }
.sidebar-search input { display: none; }
.sidebar-search input.visible { display: block; }

/* ─── Barra de progresso de leitura ─── */
.read-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: transparent; z-index: 600; pointer-events: none;
}
.read-bar span {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width .12s linear;
}

/* ─── Botão voltar ao topo ─── */
.btn-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 380;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary); color: var(--bg-2);
  font-size: 1.15rem; font-weight: 800;
  box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transform: translateY(14px) scale(.9);
  transition: all var(--transition-spring);
}
[data-theme="dark"] .btn-top { color: #14161c; }
.btn-top.show { opacity: 1; pointer-events: auto; transform: none; }
.btn-top:hover { transform: translateY(-3px) scale(1.05); }

/* ─── Paleta de comandos ─── */
.palette {
  position: fixed; inset: 0; z-index: 950;
  background: rgba(4, 20, 10, .45);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 10vh 20px 20px;
  animation: fadeIn .16s ease both;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.palette-box {
  width: 100%; max-width: 620px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  overflow: hidden; display: flex; flex-direction: column;
  max-height: 70vh;
  animation: modalUp .2s ease both;
}

.palette-search {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px; border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.palette-search .ps-ico { font-size: 1.05rem; opacity: .6; }
.ps-input {
  flex: 1; background: none; border: none; outline: none;
  font-size: 1rem; color: var(--text); min-width: 0;
}
.ps-input::placeholder { color: var(--text-3); }
.palette-search kbd {
  font-family: var(--font-mono); font-size: .68rem; font-weight: 700;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 5px; padding: 3px 7px; color: var(--text-3);
}

.palette-list { overflow-y: auto; padding: 8px; flex: 1; }
.palette-group {
  font-size: .66rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .12em; color: var(--text-3);
  padding: 12px 12px 6px;
}
.palette-group:first-child { padding-top: 6px; }

.palette-item {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 10px 12px; border-radius: 10px; text-align: left;
  transition: background .12s ease;
}
.palette-item.active { background: var(--primary-soft); }
.palette-item .pi-ico { font-size: 1.05rem; width: 24px; text-align: center; flex-shrink: 0; }
.palette-item .pi-label {
  flex: 1; min-width: 0; display: flex; flex-direction: column;
  font-size: .9rem; font-weight: 600; color: var(--text);
}
.palette-item .pi-label em {
  font-style: normal; font-size: .72rem; font-weight: 500;
  color: var(--text-3); margin-top: 1px;
}
.palette-item .pi-label mark {
  background: transparent; color: var(--primary);
  font-weight: 800; padding: 0;
}
.palette-item .pi-done { color: var(--success); font-size: .85rem; flex-shrink: 0; }

.palette-empty { padding: 40px 24px; text-align: center; color: var(--text-2); font-size: .9rem; }
.palette-empty small { color: var(--text-3); font-size: .8rem; }

.palette-foot {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 10px 16px; border-top: 1px solid var(--border);
  font-size: .7rem; color: var(--text-3); flex-shrink: 0;
}
.palette-foot kbd {
  font-family: var(--font-mono); font-size: .64rem;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 5px; margin-right: 3px;
}
.palette-foot .pf-count { margin-left: auto; font-weight: 700; }

/* ─── Tabela de atalhos ─── */
.sc-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.sc-table th {
  text-align: left; padding: 10px 12px; font-size: .72rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--primary);
  border-bottom: 1px solid var(--border);
}
.sc-table td { padding: 11px 12px; border-bottom: 1px solid var(--border); color: var(--text-2); }
.sc-table td:first-child { white-space: nowrap; width: 1%; }
.sc-table kbd {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 700;
  background: var(--surface-2); border: 1px solid var(--border);
  border-bottom-width: 2px; border-radius: 5px; padding: 2px 7px;
  color: var(--text); margin-right: 3px;
}
.sc-table tr:last-child td { border-bottom: none; }

/* ─── Sumário do capítulo (âncoras) ─── */
.ch-outline {
  position: sticky; top: calc(var(--topbar-h) + 16px);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 26px;
}
.ch-outline > summary {
  font-size: .76rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .1em; color: var(--primary); cursor: pointer;
  list-style: none; user-select: none;
}
.ch-outline > summary::-webkit-details-marker { display: none; }
.ch-outline > summary::after { content: " ▾"; }
.ch-outline[open] > summary::after { content: " ▴"; }
.ch-outline ol { list-style: none; margin-top: 12px; display: flex; flex-direction: column; gap: 2px; }
.ch-outline a {
  display: block; padding: 7px 12px; border-radius: 8px;
  font-size: .84rem; color: var(--text-2); border-left: 2px solid transparent;
  transition: all .15s ease;
}
.ch-outline a:hover { background: var(--surface-2); color: var(--text); }
.ch-outline a.current {
  background: var(--primary-soft); color: var(--primary);
  border-left-color: var(--primary); font-weight: 700;
}

/* ─── Filtros da home ─── */
.home-filters {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px;
  align-items: center;
}
.filter-chip {
  padding: 7px 15px; border-radius: 20px; font-size: .8rem; font-weight: 700;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-2); transition: all var(--transition);
}
.filter-chip:hover { border-color: var(--primary); color: var(--primary); }
.filter-chip.active { background: var(--primary); border-color: var(--primary); color: var(--bg-2); }
[data-theme="dark"] .filter-chip.active { color: #14161c; }
.filter-chip .fc-count {
  display: inline-block; margin-left: 6px; opacity: .7;
  font-family: var(--font-mono); font-size: .72rem;
}
.home-filters .hf-label {
  font-size: .76rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-3); font-weight: 700; margin-right: 4px;
}

/* ─── Barra de progresso por parte (sidebar) ─── */
.toc-part-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; width: 100%;
  font-size: .66rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .12em; color: var(--text-3);
  padding: 14px 10px 6px;
}
.toc-part-progress {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: 0;
  padding: 2px 7px; border-radius: 10px;
  background: var(--surface-2); color: var(--text-3);
}
.toc-part-progress.done { background: var(--success-soft); color: var(--success); }
.toc-part-progress.partial { background: var(--primary-soft); color: var(--primary); }

/* ─── Destaque do capítulo atual na sidebar ─── */
.toc-item.active {
  box-shadow: inset 2px 0 0 var(--primary);
}

/* ─── Botão continuar (sidebar) ─── */
#btnContinue { width: 100%; justify-content: center; }

/* ─── Responsivo ─── */
@media (max-width: 860px) {
  .btn-top { right: 14px; bottom: 74px; }
  .ch-outline { position: static; }
  .palette { padding: 6vh 12px 12px; }
  .palette-foot { display: none; }
}

@media (max-width: 620px) {
  .search-trigger .st-text { display: none; }
  .search-trigger kbd { display: none; }
  .sc-table td:first-child { width: auto; }
}

/* ═══════════════════════════════════════════════════════
   v3 — ELEMENTOS DE NAVEGAÇÃO (complemento)
   ═══════════════════════════════════════════════════════ */

/* ─── Progresso dentro do hero ─── */
.hero-progress { display: flex; align-items: center; gap: 14px; margin-top: 26px; }
.hp-bar { flex: 1; max-width: 320px; height: 8px; background: var(--bg-3); border-radius: 5px; overflow: hidden; }
.hp-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 5px; }
.hero-progress > span { font-size: .8rem; font-weight: 700; color: var(--text-2); }

/* ─── Número do capítulo no card ─── */
.chapter-card { position: relative; }
.cc-num {
  position: absolute; top: 14px; right: 16px;
  font-family: var(--font-mono); font-size: .7rem; font-weight: 700;
  color: var(--text-3); opacity: .5; letter-spacing: -.02em;
}
.chapter-card.done .cc-num { color: var(--success); opacity: .7; }
.chapter-card .cc-icon { margin-right: 22px; }

/* ─── Estado vazio ─── */
.empty-state {
  text-align: center; padding: 60px 24px;
  background: var(--surface); border: 1px dashed var(--border);
  border-radius: var(--radius); margin: 10px 0;
}
.empty-state .es-ico { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 8px; }
.empty-state p { color: var(--text-2); margin-bottom: 20px; font-size: .92rem; }

/* ─── Breadcrumb clicável ─── */
.crumb-link {
  color: var(--text-3); font-size: inherit; transition: color .15s ease;
  border-radius: 4px; padding: 1px 3px;
}
.crumb-link:hover { color: var(--primary); }
.crumb-sep { margin: 0 6px; opacity: .5; }
.breadcrumb button { font-size: inherit; font-family: inherit; }

/* ─── Cabeçalho do capítulo ─── */
.ch-top {
  display: flex; align-items: center; gap: 10px; margin-bottom: 10px;
  flex-wrap: wrap;
}
.ch-counter {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 700;
  letter-spacing: .04em; color: var(--primary);
  background: var(--primary-soft); padding: 5px 12px; border-radius: 20px;
}
.ch-done-badge {
  font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em;
  background: var(--success-soft); color: var(--success);
  padding: 5px 12px; border-radius: 20px;
}

/* ─── Destaque de cartão focado ─── */
.flash-highlight {
  animation: highlightPulse 1.6s ease;
}
@keyframes highlightPulse {
  0%, 100% { box-shadow: var(--shadow); }
  30% { box-shadow: 0 0 0 4px var(--primary-glow), var(--shadow); }
}

/* ─── Desafio relacionado no capítulo ─── */
.rel-chal { display: flex; flex-direction: column; gap: 9px; }
.rc-item {
  display: flex; align-items: center; gap: 13px; width: 100%;
  padding: 14px 16px; border-radius: 11px; text-align: left;
  background: var(--surface); border: 1px solid var(--border);
  transition: all var(--transition);
}
.rc-item:hover { border-color: var(--primary); transform: translateX(4px); }
.rc-ico { font-size: 1.4rem; }
.rc-item strong { display: block; font-size: .92rem; }
.rc-item small { font-size: .74rem; color: var(--accent); font-weight: 700; font-family: var(--font-mono); }

/* ─── Quiz: dica e botão do sumário ─── */
.quiz-hint { color: var(--text-2); font-size: .85rem; margin-bottom: 18px; }
.summary-btn { width: auto; margin-top: 16px; display: inline-flex; }

/* ─── Link para a landing page de vendas ─── */
.lp-link { text-decoration: none; }
.sidebar-lp { text-decoration: none; }

/* ─── Sidebar: botão continuar em destaque ─── */
.sidebar-foot #btnContinue {
  background: var(--primary); color: var(--bg-2); border: 1px solid var(--primary);
  font-size: .8rem; padding: 10px 12px;
}
.sidebar-foot #btnContinue:hover { background: var(--primary-strong); border-color: var(--primary-strong); }
[data-theme="dark"] .sidebar-foot #btnContinue { color: #14161c; }
.sidebar-foot #btnContinue kbd {
  font-family: var(--font-mono); font-size: .62rem;
  background: color-mix(in srgb, var(--bg-2) 25%, transparent);
  border: 1px solid color-mix(in srgb, var(--bg-2) 35%, transparent);
  border-radius: 4px; padding: 1px 5px; margin-left: 5px;
}
.sidebar-foot .btn-ghost { font-size: .76rem; padding: 7px 10px; }
.sidebar-foot kbd {
  font-family: var(--font-mono); font-size: .62rem;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 5px;
}

/* ─── Summary-box: botão de flashcards ─── */
.summary-box .btn-ghost.small { width: auto; margin-top: 16px; display: inline-flex; }

/* ─── Modal de atalhos: scroll em telas baixas ─── */
#shortcutsModal .modal-body { max-height: 70vh; overflow-y: auto; }

/* ─── Garante que o botão lateral não conflite com o bottom-nav ─── */
@media (max-width: 860px) {
  .btn-top { bottom: 80px; }
}

@media print {
  .read-bar, .btn-top, .palette, .search-trigger, .ch-outline, .home-filters { display: none !important; }
}

/* Acessibilidade: foco visível */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Animações de entrada de conteúdo */
.view > * { animation: fadeUp .4s ease both; }
.view > *:nth-child(2) { animation-delay: .05s; }
.view > *:nth-child(3) { animation-delay: .1s; }
.view > *:nth-child(4) { animation-delay: .15s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ═══════════════════════════════════════════════════════
   v4 — TRAVA DE CONTEÚDO (Gate)
   ═══════════════════════════════════════════════════════ */

/* Conteúdo desfocado atrás da tela de acesso */
.shell.blurred {
  filter: blur(7px);
  pointer-events: none;
  user-select: none;
  opacity: .55;
  transition: filter .2s ease, opacity .2s ease;
}

.gate-screen {
  position: fixed; inset: 0; z-index: 940;
  display: grid; place-items: center;
  padding: 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  animation: fadeIn .2s ease both;
  overflow-y: auto;
}

.gate-box {
  width: 100%; max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 34px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: modalUp .28s ease both;
}

.gate-lock {
  width: 64px; height: 64px; margin: 0 auto 20px;
  border-radius: 50%; display: grid; place-items: center;
  font-size: 1.8rem;
  background: var(--primary-soft);
  border: 1px solid var(--border);
}

.gate-box h2 {
  font-family: var(--font-display);
  font-size: 1.45rem; letter-spacing: -.02em; margin-bottom: 12px;
}
.gate-lead {
  font-size: .93rem; color: var(--text-2);
  line-height: 1.65; margin-bottom: 26px;
}

.gate-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  padding: 18px 0; margin-bottom: 26px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.gate-stats div { display: flex; flex-direction: column; gap: 3px; }
.gate-stats strong { font-family: var(--font-mono); font-size: 1.3rem; font-weight: 800; }
.gate-stats span { font-size: .68rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; }

.gate-form { text-align: left; }
.gate-form label {
  display: block; font-size: .76rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-3); margin-bottom: 8px;
}
.gate-input-row { display: flex; gap: 9px; }
.gate-input-row input {
  flex: 1; min-width: 0;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
  font-size: .95rem; font-family: var(--font-mono);
  outline: none; transition: border-color var(--transition);
}
.gate-input-row input:focus { border-color: var(--primary); }
.gate-input-row .btn-primary { flex-shrink: 0; }

.gate-msg {
  font-size: .84rem; margin-top: 11px;
  min-height: 20px; opacity: 0; transition: opacity .2s ease;
}
.gate-msg.show { opacity: 1; }
.gate-msg.error { color: var(--danger); }
.gate-msg.ok { color: var(--success); }

.gate-form.shake { animation: shake .4s ease; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.gate-actions {
  display: flex; align-items: center; justify-content: center;
  gap: 18px; flex-wrap: wrap; margin-top: 22px;
  padding-top: 20px; border-top: 1px solid var(--border);
}
.gate-link {
  font-size: .85rem; font-weight: 600; color: var(--primary);
  text-decoration: none; border-bottom: 1px solid transparent;
}
.gate-link:hover { border-bottom-color: currentColor; }

@media (max-width: 520px) {
  .gate-box { padding: 30px 22px; }
  .gate-input-row { flex-direction: column; }
  .gate-input-row .btn-primary { width: 100%; }
  .gate-stats { gap: 6px; }
  .gate-stats strong { font-size: 1.1rem; }
}

/* Impressão */
@media print {
  .sidebar, .topbar, .chapter-nav, .foot, .pwa-bar { display: none !important; }
  .shell { margin: 0; }
  body { background: #fff; color: #000; }
  .gate-screen, .shell.blurred { display: none !important; }
  .read-bar, .btn-top, .palette, .search-trigger,
  .ch-outline, .home-filters { display: none !important; }
}