/* Paleta e tipografia dos slides de PAA1 (tema metropolis.scss). */
:root {
  --ink: #23373b;
  --ink-dark: #152224;
  --muted: #6b777d;
  --line: #dde3e7;
  --line-strong: #9aa5ad;
  --panel: #f5f7f9;
  --bg: #ffffff;

  --blue: #2e75b6;
  --blue-dark: #1f5a8f;
  --blue-soft: #e3eef8;
  --orange: #eb811b;
  --orange-dark: #c0650c;
  --orange-soft: #fdf0e2;
  --green: #3a7a10;
  --green-soft: #e6f2dc;
  --red: #b31313;

  --font: "Lexend", "Gill Sans Nova", "Gill Sans MT", "Gill Sans", "Trebuchet MS", Arial, sans-serif;
  --math: "Times New Roman", "Latin Modern Roman", serif;
  --mono: "Fira Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  grid-template-columns: minmax(0, 1fr); /* não deixa textos em nowrap alargarem a página */
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.4;
}

i { font-family: var(--math); font-size: 1.08em; }
code { font-family: var(--mono); font-size: 0.92em; }

/* ── Barra de progresso (como nos slides) ─────────────────────────────── */
.progress { height: 4px; background: var(--line); }
.progress-bar { height: 100%; width: 0; background: var(--blue); transition: width 0.25s ease; }

/* ── Topo ─────────────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: baseline; gap: 0.9rem; min-width: 0; }
.brand h1 { margin: 0; font-size: 1.35rem; font-weight: 600; color: var(--red); white-space: nowrap; }
.example-current { color: var(--muted); font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.top-actions { display: flex; align-items: center; gap: 0.5rem; }

/* ── Botões ───────────────────────────────────────────────────────────── */
.btn {
  font: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.45rem 0.95rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover:not(:disabled) { border-color: var(--blue); color: var(--blue); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn:focus-visible, .example:focus-visible, .select:focus-visible, .text-input:focus-visible { outline: 3px solid rgba(46, 117, 182, 0.35); outline-offset: 1px; }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--blue-dark); border-color: var(--blue-dark); color: #fff; }
.btn.active { background: var(--blue-soft); border-color: var(--blue); color: var(--blue-dark); }
.btn.icon { width: 2.3rem; padding: 0.45rem 0; font-weight: 600; }
.btn.block { width: 100%; }

.select {
  font: inherit;
  font-size: 0.95rem;
  padding: 0.42rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
}

/* ── Menu de exemplos ─────────────────────────────────────────────────── */
.menu-wrap { position: relative; }
.menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 20;
  width: 340px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding: 0.9rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(35, 55, 59, 0.16);
}
.menu hr { border: 0; border-top: 1px solid var(--line); margin: 0.8rem 0; }
.menu-title { margin: 0 0 0.45rem; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.example-list { display: grid; gap: 0.35rem; }
.example {
  display: grid;
  gap: 0.1rem;
  text-align: left;
  font: inherit;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
}
.example:hover { border-color: var(--blue); background: var(--blue-soft); }
.example-name { font-weight: 500; }
.example-desc { font-size: 0.82rem; color: var(--muted); }
.menu-form { display: flex; gap: 0.45rem; }
.text-input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 0.95rem;
  padding: 0.42rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--ink);
}
.menu-field { display: grid; grid-template-columns: auto 1fr 1.6rem; align-items: center; gap: 0.6rem; margin-bottom: 0.6rem; font-size: 0.95rem; }
.menu-field input { accent-color: var(--blue); }
.menu-field output { font-weight: 600; text-align: right; }
.menu-hint { margin: 0.5rem 0 0; font-size: 0.8rem; color: var(--muted); }
.menu-hint.error { color: var(--red); font-weight: 500; }

/* ── Layout principal ─────────────────────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  min-height: 0;
}
.layout.with-pseudo { grid-template-columns: 390px minmax(0, 1fr) 400px; }

.panel { background: var(--panel); min-height: 0; overflow-y: auto; }
.panel h2 { margin: 0 0 0.2rem; font-size: 1.05rem; font-weight: 600; }

/* ── Pseudocódigo ─────────────────────────────────────────────────────── */
.pseudo-panel { border-right: 1px solid var(--line); padding: 1rem 1.1rem; }
.pseudo { margin-top: 0.6rem; font-size: 0.92rem; }
.pseudo-head { margin: 0 0 0.4rem; }
.pseudo-head .proc { font-variant: small-caps; font-weight: 600; letter-spacing: 0.02em; }
.pseudo-lines { margin: 0; padding: 0; list-style: none; counter-reset: line; }
.pseudo-lines li {
  position: relative;
  counter-increment: line;
  padding: 0.22rem 0.5rem 0.22rem 2.3rem;
  border-radius: 6px;
  border-left: 3px solid transparent;
  transition: background 0.15s;
}
.pseudo-lines li::before {
  content: counter(line) ":";
  position: absolute;
  left: 0.35rem;
  width: 1.6rem;
  text-align: right;
  font-size: 0.8em;
  color: var(--muted);
  top: 0.3rem;
}
.pseudo-lines li.nonum { counter-increment: none; padding-left: 0.5rem; }
.pseudo-lines li.nonum::before { content: none; }
.pseudo-lines li.in1 { padding-left: 3.5rem; }
.pseudo-lines li.meta { color: var(--muted); font-size: 0.9em; }
.pseudo-lines li.hl { background: var(--orange-soft); border-left-color: var(--orange); }

/* ── Palco (floresta) ─────────────────────────────────────────────────── */
.stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 0;
  padding: 0.8rem 1.2rem 0.6rem;
}

.sets { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 2.2rem; font-size: 1.1rem; }
.set-name { font-family: var(--math); font-style: italic; font-size: 1.15em; font-weight: 600; color: var(--blue); }

.tree-wrap { min-height: 0; display: flex; }
.forest { width: 100%; height: 100%; min-height: 240px; display: block; }

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem 1.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--muted);
}
.legend li { display: flex; align-items: center; gap: 0.4rem; }
.swatch { display: inline-block; width: 16px; height: 16px; border-radius: 50%; border: 2.5px solid var(--ink); }
.swatch.node-leaf { background: var(--ink); border-color: var(--ink-dark); }
.swatch.node-internal { background: #fff; }
.swatch.node-pick { background: var(--orange); border-color: var(--orange-dark); }
.swatch.node-new { background: var(--green); border-color: #2a5a0b; }
.swatch.line-path { width: 24px; height: 0; border-radius: 0; border: 0; border-top: 5px solid var(--red); }

/* ── Elementos da floresta (SVG) ──────────────────────────────────────── */
.forest .enter { opacity: 0; }
.tnode, .edge, .bit { transition: opacity 0.35s ease; }

.edge { stroke: var(--line-strong); stroke-width: 3.5; stroke-linecap: round; transition: stroke 0.2s, stroke-width 0.2s, opacity 0.35s; }
.edge.pick { stroke: var(--orange); stroke-width: 5; }
.edge.new { stroke: var(--green); stroke-width: 6; }
.edge.path { stroke: var(--red); stroke-width: 6; }

.bit {
  font-family: var(--font);
  font-size: 19px;
  font-weight: 600;
  fill: var(--blue);
  text-anchor: middle;
  dominant-baseline: central;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 6px;
  stroke-linejoin: round;
}
.bit.done { font-size: 21px; font-weight: 700; }
.bit.pick { fill: var(--orange-dark); }
.bit.new { fill: var(--green); font-size: 22px; font-weight: 700; }
.bit.path { fill: var(--red); font-size: 23px; font-weight: 700; }

.tnode .body { stroke-width: 3; transition: fill 0.25s, stroke 0.25s; }
.tnode .ring { fill: none; stroke: transparent; stroke-width: 6; transition: stroke 0.25s; }
.tnode .label { font-family: var(--font); font-weight: 600; text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.tnode.leaf .body { fill: var(--ink); stroke: var(--ink-dark); }
.tnode.leaf .label { font-size: 24px; fill: #fff; }
.tnode.internal .body { fill: #fff; stroke: var(--ink); }
.tnode.internal .label { font-size: 21px; fill: var(--ink); }
.tnode.leaf { cursor: pointer; }

.tnode.raw .body { fill: #fff; stroke: var(--line-strong); stroke-dasharray: 6 4; }
.tnode.raw .label { fill: var(--ink); }

.tnode.pick .ring { stroke: var(--orange); stroke-opacity: 0.35; }
.tnode.pick-root .ring { stroke-opacity: 0.6; }
.tnode.pick-root .body { fill: var(--orange); stroke: var(--orange-dark); }
.tnode.pick-root .label { fill: #fff; }
.tnode.new .body { fill: var(--green); stroke: #2a5a0b; }
.tnode.new .label { fill: #fff; }
.tnode.new .ring { stroke: var(--green); stroke-opacity: 0.45; }
.tnode.grew .ring { stroke: var(--green); stroke-opacity: 0.4; }
.tnode.path .body { stroke: var(--red); stroke-width: 5; }
.tnode.leaf.path .body { fill: var(--red); stroke: #7d0d0d; }

.tag {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 700;
  fill: var(--orange-dark);
  text-anchor: middle;
  dominant-baseline: central;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 6px;
  pointer-events: none;
}
.tag .sub { font-size: 15px; }
.tag.new { fill: var(--green); }

.wt { font-family: var(--font); font-size: 17px; fill: var(--muted); text-anchor: middle; dominant-baseline: central; }
.code {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  fill: var(--blue-dark);
  text-anchor: middle;
  dominant-baseline: central;
}
.code.done { fill: var(--blue); font-size: 19px; }
.code .fresh { fill: var(--green); font-weight: 700; }
.tnode.path .code { fill: var(--red); }

/* ── Painel lateral: fila e tabela ────────────────────────────────────── */
.side-panel { border-left: 1px solid var(--line); padding: 1rem 1.1rem; }
.side-block + .side-block { margin-top: 1.3rem; }
.side-panel h2 { font-size: 1.25rem; }
.side-sub { margin: 0 0 0.7rem; font-size: 0.92rem; color: var(--muted); }

.heap { display: flex; flex-wrap: wrap; gap: 0.55rem; min-height: 3.8rem; align-items: flex-start; }
.heap .empty { margin: 0.4rem 0; color: var(--muted); font-style: italic; }
.chip {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 3.3rem;
  padding: 0.3rem 0.6rem 0.25rem;
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 8px;
  line-height: 1.15;
}
.chip-id { font-weight: 600; font-size: 1.2rem; white-space: nowrap; }
.chip-key { font-size: 1.05rem; color: var(--muted); }
.chip[data-tag]::before {
  content: attr(data-tag);
  position: absolute;
  top: -0.9rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0 0.3rem;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--panel);
}
.chip.pick { border-color: var(--orange); box-shadow: 0 0 0 3px var(--orange-soft); }
.chip.pick::before { color: var(--orange-dark); }
.chip.changed { border-color: var(--green); background: var(--green-soft); }
.chip.changed::before { color: var(--green); }
.chip.changed .chip-key { color: var(--green); font-weight: 600; }
.chip.leaving { border-style: dashed; border-color: var(--orange); background: var(--orange-soft); opacity: 0.85; }
.chip.leaving::before { color: var(--orange-dark); }
.chip.leaving .chip-id { text-decoration: line-through; }
.heap:has(.chip[data-tag]) { padding-top: 0.75rem; }

.code-table { width: 100%; border-collapse: collapse; font-size: 1.1rem; margin-top: 0.4rem; }
.code-table th {
  text-align: left;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.3rem 0.4rem;
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}
.code-table td { padding: 0.3rem 0.45rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
.code-table tbody tr:last-child td { border-bottom: 2px solid var(--ink); }
.code-table .col-sym { font-weight: 600; white-space: nowrap; }
.code-table .col-w { color: var(--muted); }
.code-table .col-code { font-family: var(--mono); font-weight: 600; color: var(--blue-dark); letter-spacing: 0.04em; }
.code-table .col-bits { color: var(--muted); font-variant-numeric: tabular-nums; }
.code-table .dot { display: inline-block; width: 14px; height: 14px; margin-right: 0.5rem; border-radius: 50%; border: 2px solid var(--ink-dark); background: var(--ink); vertical-align: -1px; }
.code-table tr.pick { background: var(--orange-soft); }
.code-table tr.pick .dot { background: var(--orange); border-color: var(--orange-dark); }
.code-table tr.changed { background: var(--green-soft); }
.code-table tr.done .col-code { color: var(--blue); }
.code-table .fresh { color: var(--green); }
.code-table tr { cursor: default; }
.code-table tr.hovered td { box-shadow: inset 0 -2px 0 var(--red); }
.code-table tr.hovered .col-code { color: var(--red); }

.cost { margin-top: 0.7rem; font-size: 0.98rem; }
.cost p { margin: 0.3rem 0; }
.cost-label { color: var(--muted); }
.cost .fresh { color: var(--green); font-weight: 700; }
.cost-note { font-size: 0.85rem; color: var(--muted); }

/* ── Controles e mensagem ─────────────────────────────────────────────── */
.controls { border-top: 1px solid var(--line); padding: 0.7rem 1.25rem 0.8rem; }
.message { margin: 0 auto 0.6rem; max-width: 1020px; min-height: 2.9em; text-align: center; font-size: 1.1rem; }
.message .ref { font-weight: 600; }
.message .tip { display: block; margin-top: 0.15rem; font-size: 0.85rem; color: var(--muted); }
.control-row { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 0.5rem; }
.control-row #nextBtn { min-width: 8.5rem; }
.step-counter { min-width: 8.5rem; margin-left: 0.4rem; color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }

/* ── Ajuda ────────────────────────────────────────────────────────────── */
.dialog {
  max-width: 580px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  color: var(--ink);
  font-family: var(--font);
}
.dialog::backdrop { background: rgba(35, 55, 59, 0.35); }
.dialog h2 { margin: 0 0 0.6rem; font-size: 1.2rem; }
.dialog ul { margin: 0 0 1rem; padding-left: 1.2rem; }
.dialog li { margin-bottom: 0.4rem; }
.dialog form { text-align: right; }
kbd { font-family: var(--font); font-size: 0.8em; padding: 0.05rem 0.35rem; border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 4px; }

/* ── Telas menores ────────────────────────────────────────────────────── */
@media (max-width: 1400px) {
  .layout { grid-template-columns: minmax(0, 1fr) 350px; }
  .layout.with-pseudo { grid-template-columns: 320px minmax(0, 1fr) 340px; }
  .pseudo { font-size: 0.84rem; }
  .pseudo-panel, .side-panel { padding: 0.8rem 0.9rem; }
  .code-table { font-size: 1rem; }
}

@media (max-height: 800px) {
  .stage { padding-top: 0.5rem; padding-bottom: 0.4rem; }
  .sets { font-size: 1rem; }
  .pseudo-lines li { padding-top: 0.12rem; padding-bottom: 0.12rem; }
  .pseudo-lines li::before { top: 0.2rem; }
  .code-table td { padding-top: 0.16rem; padding-bottom: 0.16rem; }
  .side-block + .side-block { margin-top: 0.9rem; }
  .controls { padding-top: 0.5rem; padding-bottom: 0.55rem; }
  .message { margin-bottom: 0.4rem; min-height: 2.6em; font-size: 1.02rem; }
}

@media (max-height: 640px) {
  /* Embutido nos slides (iframe baixo): a legenda cede espaço para a floresta. */
  .legend { display: none; }
  .side-sub { display: none; }
}

@media (max-width: 1100px) {
  /* Sem espaço para três colunas: o pseudocódigo vira uma gaveta sobre a floresta. */
  .layout { position: relative; }
  .layout, .layout.with-pseudo { grid-template-columns: minmax(0, 1fr) 350px; }
  .pseudo-panel { position: absolute; top: 0; left: 0; bottom: 0; z-index: 10; width: min(390px, 92vw); box-shadow: 8px 0 24px rgba(35, 55, 59, 0.14); }
}

@media (max-width: 1000px) {
  .layout, .layout.with-pseudo { grid-template-columns: minmax(0, 1fr) 300px; }
  .code-table { font-size: 0.95rem; }
  .chip-id { font-size: 1.05rem; }
}

@media (max-width: 800px) {
  body { height: auto; }
  .layout, .layout.with-pseudo { grid-template-columns: 1fr; }
  .pseudo-panel { position: static; width: auto; box-shadow: none; border-right: 0; border-bottom: 1px solid var(--line); }
  .forest { height: 58vh; }
  .side-panel { border-left: 0; border-top: 1px solid var(--line); }
  .example-current { display: none; }
  .brand h1 { font-size: 1.15rem; }
  .btn { padding: 0.45rem 0.7rem; }
}

@media (min-width: 1600px) {
  body { font-size: 19px; }
  .layout { grid-template-columns: minmax(0, 1fr) 450px; }
  .layout.with-pseudo { grid-template-columns: 430px minmax(0, 1fr) 450px; }
}

@media (prefers-reduced-motion: reduce) {
  .progress-bar, .tnode, .edge, .bit, .tnode .body, .tnode .ring { transition: none; }
}