/* ============================================================
   Caso 2: Como a informação se espalha em rede
   Estilos específicos da página, construídos sobre os tokens
   e componentes de global.css / components.css.
   ============================================================ */

html { scroll-behavior: smooth; }
body { min-height: 100vh; }

.icon { width: 16px; height: 16px; flex: none; display: inline-block; vertical-align: middle; }

/* ---------- topo fixo (tema) ---------- */
.top-bar {
  position: fixed; top: 0; right: 0; z-index: 50;
  padding: var(--space-4);
  display: flex; gap: var(--space-2);
}

/* ============================================================
   TELA DE ESCOLHA
   ============================================================ */
.choice-screen {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: var(--space-9) var(--space-8);
  gap: var(--space-8);
  text-align: center;
}
.choice-screen .eyebrow { margin-bottom: var(--space-2); }
.choice-screen h1 { font-size: var(--text-hero); max-width: 16ch; }
.choice-screen .lede {
  font-size: var(--text-lg); color: var(--ink-soft); max-width: 56ch; margin-top: var(--space-3);
}
.choice-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6);
  max-width: 880px; width: 100%; margin-top: var(--space-4);
}
@media (max-width: 720px) { .choice-grid { grid-template-columns: 1fr; } }
.choice-card {
  text-align: left;
  display: flex; flex-direction: column;
  cursor: pointer;
  border: 1px solid var(--line);
}
.choice-card:hover { border-color: var(--brand-blue); }
.choice-card .node-dot { margin-bottom: var(--space-3); width: 14px; height: 14px; }
.choice-card .card-title { font-size: 1.7rem; }
.choice-card .card-content { flex: 1; margin: var(--space-3) 0 var(--space-5); }
.choice-card .btn-pill { align-self: flex-start; }
.continue-strip {
  font-family: 'Space Mono', monospace; font-size: var(--text-sm);
  color: var(--ink-soft); display: flex; align-items: flex-start; gap: var(--space-2);
  max-width: 60ch; text-align: left;
}
.continue-strip .node-dot { flex: none; margin-top: 5px; }
.continue-strip a { text-decoration: none; }
.continue-strip a:hover { text-decoration: underline; }

/* ============================================================
   SHELL (sidebar + conteúdo)
   ============================================================ */
.app-shell { min-height: 100vh; }
@media (max-width: 860px) { .app-sidebar { position: static; width: auto; height: auto; } .app-main { margin-left: 0; } }

.app-sidebar {
  border: none; border-right: 1px solid var(--line); border-radius: 0;
  position: fixed; top: 0; left: 0; height: 100vh; z-index: 10;
}
.app-sidebar .sidebar-header { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; }
.app-sidebar .sidebar-header .wordmark { font-size: var(--text-sm-alt); }
.mode-chip {
  font-family: 'Space Mono', monospace; font-size: var(--text-xs); letter-spacing: 0.04em;
  padding: 3px 9px; border-radius: 999px; text-transform: uppercase;
}
.mode-chip.entender { background: color-mix(in srgb, var(--sky) 45%, transparent); color: var(--sky-ink); }
.mode-chip.seguir { background: color-mix(in srgb, var(--lime) 45%, transparent); color: var(--lime-ink); }

.app-sidebar .sidebar-item .node-dot { flex: none; }
.switch-mode-btn { width: 100%; justify-content: center; margin-top: var(--space-2); }

main.app-main { padding: var(--space-9) var(--space-8) 120px; max-width: 900px; margin-left: 250px; }
@media (max-width: 640px) { main.app-main { padding: var(--space-7) var(--space-5) 100px; } }

main.app-main .eyebrow { margin-bottom: var(--space-2); }
main.app-main h1 { font-size: 2.1rem; margin-bottom: var(--space-2); }
main.app-main .lede { font-size: var(--text-lg); color: var(--ink-soft); max-width: 64ch; margin-bottom: var(--space-7); }

.doc-section { margin-top: var(--space-8); }
.doc-section h2 { font-size: var(--text-h2); margin-bottom: var(--space-4); }
.doc-section h3 { font-family: 'DM Serif Display', serif; font-size: 1.15rem; margin-bottom: var(--space-2); }
.doc-section p, .doc-section li { max-width: 66ch; color: var(--ink); line-height: 1.6; }
.doc-section ul, .doc-section ol { padding-left: 1.2em; margin: 0; }
.doc-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
@media (max-width: 640px) { .doc-grid-2 { grid-template-columns: 1fr; } }

dl.glossary { display: grid; gap: var(--space-4); }
dl.glossary dt { font-family: 'DM Serif Display', serif; font-size: 1.05rem; }
dl.glossary dd { margin: 2px 0 0; color: var(--ink-soft); }

/* seguir mode: hub de encontros na página Início */
.hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); margin-top: var(--space-6); }
@media (max-width: 720px) { .hub-grid { grid-template-columns: 1fr; } }
.hub-card { cursor: pointer; }
.hub-card:hover { border-color: var(--brand-blue); }
.hub-card .eyebrow { color: var(--brand-blue); }

/* ============================================================
   STEPPER HORIZONTAL
   ============================================================ */
.stepper-head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  margin-bottom: var(--space-5); flex-wrap: wrap;
}
.stepper-progress { display: flex; gap: 6px; flex-wrap: wrap; }
.stepper-dot {
  font-family: 'Space Mono', monospace; font-size: var(--text-xs);
  width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--paper-raised); color: var(--ink-soft);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.stepper-dot:hover { border-color: var(--ink-soft); }
.stepper-dot.active { background: var(--brand-blue); border-color: var(--brand-blue); color: var(--brand-blue-ink); }
.stepper-nav { display: flex; gap: var(--space-2); }
.stepper-nav .carousel-btn { width: 36px; height: 36px; }
.stepper-nav .carousel-btn:disabled { opacity: 0.3; }

.stepper-viewport { overflow: hidden; }
.stepper-track { display: flex; transition: transform .3s ease; align-items: flex-start; }
.stepper-slide { flex: 0 0 100%; min-width: 0; padding-right: 4px; }

.step-label {
  font-family: 'Space Mono', monospace; font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--ink-soft); margin-bottom: var(--space-2);
  display: flex; align-items: center; gap: var(--space-2);
}
.step-label .duration { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px; }

.momento-body p, .momento-body li { line-height: 1.65; }
.momento-body blockquote {
  margin: var(--space-4) 0; padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--sky); background: color-mix(in srgb, var(--sky) 10%, var(--paper-raised));
  border-radius: 0 var(--radius) var(--radius) 0; font-size: var(--text-base);
}

details.gabarito {
  margin-top: var(--space-5); border: 1px solid color-mix(in srgb, var(--pink) 40%, var(--line));
  border-radius: var(--radius); background: color-mix(in srgb, var(--pink) 5%, var(--paper-raised));
}
details.gabarito summary {
  cursor: pointer; padding: var(--space-3) var(--space-4); font-weight: 700; font-size: var(--text-sm-alt);
  color: var(--pink); list-style: none; display: flex; align-items: center; gap: var(--space-2);
  font-family: 'Space Grotesk', sans-serif;
}
details.gabarito summary::-webkit-details-marker { display: none; }
details.gabarito summary .chevron { transition: transform .15s ease; }
details.gabarito[open] summary .chevron { transform: rotate(90deg); }
details.gabarito .inner { padding: 0 var(--space-4) var(--space-4); }
details.gabarito .inner table { margin-top: var(--space-3); }

/* ============================================================
   MODO PROJEÇÃO (worksheet do estudante)
   ============================================================ */
.mode-banner {
  display: flex; align-items: center; gap: var(--space-2);
  font-family: 'Space Mono', monospace; font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--lime-ink); background: color-mix(in srgb, var(--lime) 35%, transparent);
  border-radius: 999px; padding: 6px 14px; margin-bottom: var(--space-5); width: fit-content;
}

.worksheet { margin-bottom: var(--space-5); }
.worksheet + .worksheet { margin-top: var(--space-5); }
.worksheet .card-title { font-size: 1.2rem; }

.prompt { font-weight: 700; font-family: 'Space Grotesk', sans-serif; margin: 0 0 var(--space-2); }
.fill-row { display: flex; flex-direction: column; gap: var(--space-1); margin-top: var(--space-4); }
.fill-row:first-child { margin-top: 0; }

.source-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-4) var(--space-5);
  background: var(--paper-raised); margin-bottom: var(--space-4);
}
.source-card:last-child { margin-bottom: 0; }
.source-card .tag {
  font-family: 'Space Mono', monospace; font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--brand-blue);
}
.source-card .meta { font-size: var(--text-sm); color: var(--ink-soft); margin: 2px 0 var(--space-2); }
.source-card .quote { font-style: italic; margin: 0; }

.table-wrap.editable table td { padding: var(--space-2) var(--space-3); }
.table-wrap.editable .input { border: none; border-bottom: 1px dashed var(--ink-soft); border-radius: 0; padding: 6px 2px; background: transparent; }
.table-wrap.editable .input:focus-visible { border-bottom-style: solid; border-bottom-color: var(--brand-blue); box-shadow: none; }

/* ============================================================
   UNINDO CONCEITOS (atividade clicável)
   ============================================================ */
.chips-pool { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-5); }
.chip-btn {
  font-family: 'Space Grotesk', sans-serif; font-size: var(--text-sm); text-align: left;
  border: 1px solid var(--line); background: var(--paper-raised); border-radius: var(--radius);
  padding: var(--space-2) var(--space-3); cursor: pointer; max-width: 260px;
}
.chip-btn:hover { border-color: var(--ink-soft); }
.chip-btn.selected { border-color: var(--brand-blue); box-shadow: var(--focus-ring); }
.chip-btn.placed { opacity: 0.3; cursor: default; }
.chip-btn:disabled:hover { border-color: var(--line); }

.bucket-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--space-3); }
.bucket {
  border: 1.5px dashed var(--line); border-radius: var(--radius); padding: var(--space-3);
  min-height: 88px; display: flex; flex-direction: column; gap: var(--space-2);
}
.bucket b { font-family: 'DM Serif Display', serif; font-size: var(--text-sm-alt); font-weight: 400; }
.bucket .placed-chip {
  font-size: var(--text-xs); background: var(--line); border-radius: var(--radius);
  padding: 4px 7px; line-height: 1.3;
}
.activity-actions { margin-top: var(--space-4); display: flex; gap: var(--space-3); }

footer.page-foot {
  margin-top: var(--space-9); padding-top: var(--space-5); border-top: 1px solid var(--line);
  font-size: var(--text-sm); color: var(--ink-soft);
}

.save-indicator {
  font-family: 'Space Mono', monospace; font-size: var(--text-xs); color: var(--ink-soft);
  display: flex; align-items: center; gap: 6px; margin-top: var(--space-2); opacity: 0; transition: opacity .3s ease;
}
.save-indicator.visible { opacity: 1; }
.save-indicator .node-dot { width: 6px; height: 6px; background: var(--lime); }