:root {
  --app: #1e1e21;
  --panel: #26262a;
  --editor: #2b2b30;
  --line: #3a3a41;
  --text: #d6d6d9;
  --muted: #8f8f98;
  --blue: #4fa9ff;
  --kw: #f86d7c;
  --str: #adf195;
  --num: #ffc600;
  --cmt: #6b6b66;
  --warn: #ffb347;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--app);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 15.5px;
  line-height: 1.6;
}

::selection { background: #2f5b8f; color: #fff; }

a { color: var(--blue); }

.codeline, .ln, .tab, .ticker-track span, .output-lines, .viewport-tag, .exp-genre, .warnline, .vouch-job, .offer-deal {
  font-family: Consolas, "Cascadia Mono", monospace;
}

.titlebar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: 46px;
  background: var(--panel);
  border-bottom: 1px solid #151517;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 0 14px;
}

.title-left { display: flex; align-items: center; gap: 10px; min-width: 0; }

.studio-logo {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: var(--editor);
  border: 1px solid var(--line);
  position: relative;
  flex: none;
}

.studio-logo::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  border-left: 8px solid var(--str);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}

.title-text { font-size: 12.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.menubar { display: flex; gap: 2px; margin-left: auto; }

.menubar a {
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  padding: 5px 11px;
  border-radius: 5px;
}

.menubar a:hover { background: #333338; }

.winbtns { display: flex; gap: 6px; }

.wb { width: 12px; height: 12px; border-radius: 50%; background: #45454c; }

.wb.close { background: #b8524c; }

.ide {
  display: grid;
  grid-template-columns: 250px 1fr;
  padding-top: 46px;
  min-height: 100vh;
}

.explorer {
  background: var(--panel);
  border-right: 1px solid #151517;
  padding: 16px 10px 30px;
  position: sticky;
  top: 46px;
  height: calc(100vh - 46px);
  overflow-y: auto;
}

.pane-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--muted);
  padding: 0 10px 10px;
}

.tree { list-style: none; }

.tree ul { list-style: none; padding-left: 20px; }

.node {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  font-size: 13.5px;
  color: var(--text);
  text-decoration: none;
  border-radius: 6px;
  cursor: default;
}

.node svg { width: 15px; height: 15px; flex: none; }

a.node { cursor: pointer; }

a.node:hover { background: #333338; }

a.node.active { background: #2f5b8f; color: #fff; }

.folder > .node { color: var(--muted); font-weight: 600; }

.editor { min-width: 0; display: flex; flex-direction: column; }

.tabstrip {
  display: flex;
  background: var(--panel);
  border-bottom: 1px solid #151517;
  position: sticky;
  top: 46px;
  z-index: 40;
}

.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  padding: 9px 18px;
  border-right: 1px solid #151517;
  color: var(--muted);
}

.tab.active { background: var(--editor); color: var(--text); }

.tab-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--str); }

.ticker { overflow: hidden; background: #232327; border-bottom: 1px solid #151517; padding: 7px 0; }

.ticker-track { display: flex; width: max-content; animation: ticker 30s linear infinite; }

.ticker-group { display: flex; align-items: center; gap: 30px; padding-right: 30px; flex: none; }

.ticker-track span { font-size: 11.5px; letter-spacing: 0.1em; color: var(--muted); white-space: nowrap; }

.ticker-track b { width: 5px; height: 5px; background: var(--line); flex: none; border-radius: 1px; transform: rotate(45deg); }

@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.doc { background: var(--editor); flex: 1; padding: 30px 0 80px; }

.block { max-width: 1060px; margin: 0 auto; padding: 46px 44px 30px; }

.codeline {
  font-size: 13.5px;
  color: var(--text);
  margin-bottom: 26px;
  white-space: nowrap;
  overflow-x: auto;
}

.codeline.closer { margin: 26px 0 0; }

.ln {
  display: inline-block;
  min-width: 34px;
  margin-right: 18px;
  text-align: right;
  color: #5b5b63;
  user-select: none;
}

.kw { color: var(--kw); }

.var { color: var(--text); }

.fn { color: var(--num); }

.str { color: var(--str); }

.cmt { color: var(--cmt); }

.cmt::before { content: "-- "; }

h1 {
  font-size: clamp(38px, 5.4vw, 68px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: #fff;
  max-width: 15ch;
}

h1 em {
  font-style: normal;
  color: var(--str);
}

.lead { max-width: 600px; margin-top: 22px; color: var(--muted); font-size: 17px; }

.cta-row { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: filter 0.15s, background 0.15s;
}

.btn svg { width: 14px; height: 14px; }

.btn.run { background: #3f9d4e; color: #fff; }

.btn.run:hover { filter: brightness(1.13); }

.btn.plain { background: #37373d; color: var(--text); border: 1px solid var(--line); }

.btn.plain:hover { background: #404047; }

.statgrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 60px;
}

.statgrid div {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  border-radius: 8px;
  padding: 16px 18px;
}

.statgrid div:nth-child(2) { border-left-color: var(--str); }

.statgrid div:nth-child(3) { border-left-color: var(--num); }

.statgrid div:nth-child(4) { border-left-color: var(--kw); }

.statgrid em {
  display: block;
  font-style: normal;
  font-family: Consolas, monospace;
  font-weight: 700;
  font-size: 34px;
  color: #fff;
  line-height: 1.15;
}

.statgrid i { font-style: normal; font-size: 12.5px; color: var(--muted); }

h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
  margin-bottom: 30px;
}

.split { display: grid; grid-template-columns: 7fr 5fr; gap: 40px; align-items: center; }

.split.flip .viewport { order: 2; }

.viewport {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
}

.viewport video { display: block; width: 100%; height: auto; }

.viewport-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  background: rgba(20, 20, 22, 0.85);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  padding: 4px 9px;
}

.split-info > p { color: var(--muted); margin-bottom: 20px; }

.checklist { list-style: none; }

.checklist li {
  position: relative;
  padding: 9px 0 9px 30px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
}

.checklist li:last-child { border-bottom: 1px solid var(--line); }

.checklist li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 15px;
  width: 10px;
  height: 6px;
  border-left: 2.5px solid var(--str);
  border-bottom: 2.5px solid var(--str);
  transform: rotate(-45deg);
}

.warnline {
  margin-top: 44px;
  background: rgba(255, 179, 71, 0.08);
  border: 1px solid rgba(255, 179, 71, 0.35);
  border-radius: 8px;
  padding: 13px 16px;
  font-size: 13.5px;
  color: var(--warn);
  overflow-x: auto;
  white-space: nowrap;
}

.warnline .ln { color: var(--warn); min-width: 20px; margin-right: 12px; }

.exp-list { display: flex; flex-direction: column; gap: 12px; }

.exp-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 20px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 22px;
  transition: border-color 0.15s, background 0.15s;
}

.exp-row:hover { border-color: var(--blue); background: #2a2a30; }

.exp-row h3 { font-size: 21px; font-weight: 700; color: #fff; }

.exp-main p { color: var(--muted); font-size: 13.5px; margin-top: 4px; max-width: 620px; }

.exp-genre { font-size: 11px; letter-spacing: 0.08em; color: var(--muted); }

.exp-tag {
  font-size: 12.5px;
  font-weight: 600;
  background: #37373d;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  white-space: nowrap;
}

.exp-tag.hot { background: rgba(173, 241, 149, 0.12); border-color: var(--str); color: var(--str); }

.exp-row.muted h3 { color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 20px 26px;
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover { border-color: var(--blue); transform: translateY(-3px); }

.card h4 { font-family: Consolas, monospace; font-weight: 400; font-size: 15px; margin-bottom: 10px; }

.card p { color: var(--muted); font-size: 13.5px; }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  counter-reset: step;
  margin-bottom: 34px;
}

.steps li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 18px 24px;
}

.steps li::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: Consolas, monospace;
  font-size: 13px;
  color: var(--blue);
  display: block;
  margin-bottom: 10px;
}

.steps h4 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }

.steps p { color: var(--muted); font-size: 13px; }

.faq { display: flex; flex-direction: column; gap: 10px; }

.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }

.faq details[open] { border-color: var(--blue); }

.faq summary {
  font-weight: 600;
  font-size: 15px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: ">";
  font-family: Consolas, monospace;
  color: var(--muted);
  transition: transform 0.15s;
}

.faq details[open] summary::after { transform: rotate(90deg); color: var(--blue); }

.faq details p { padding: 0 18px 18px; color: var(--muted); font-size: 14px; max-width: 760px; }

.vouch-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }

.vouch-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.vouch-stars { display: flex; gap: 3px; }

.vouch-stars svg { width: 15px; height: 15px; }

.vouch-stars .star-bg { fill: #3a3a41; }

.vouch-stars .star-fill { fill: var(--num); }

.vouch-text { font-size: 14.5px; }

.vouch-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.vouch-name { font-weight: 600; font-size: 13.5px; }

.vouch-name::before { content: "@"; color: var(--blue); }

.vouch-job { font-size: 10.5px; letter-spacing: 0.07em; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }

.vouch-empty {
  grid-column: 1 / -1;
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 42px 24px;
  text-align: center;
}

.vouch-empty p:first-child { color: var(--muted); }

.vouch-cta { margin-top: 10px; color: var(--str); font-size: 14px; }

.offer {
  margin-top: 34px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--str);
  border-radius: 10px;
  padding: 20px 22px;
}

.offer-open { font-size: 14.5px; color: var(--muted); }

.offer-open b { color: var(--text); font-weight: 600; }

.offer-deal { margin-top: 8px; font-size: 13px; color: var(--str); }

.output {
  background: #202023;
  border-top: 1px solid #151517;
  padding: 16px 24px 26px;
}

.output .pane-title { padding: 0 0 10px; }

.output-lines p { font-size: 13.5px; padding: 2px 0; color: var(--text); }

.ts { color: #5b5b63; margin-right: 14px; }

.ok { color: var(--str); }

.warn { color: var(--warn); }

.output-lines a { color: var(--blue); text-decoration: none; }

.output-lines a:hover { text-decoration: underline; }

.sig { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; color: var(--muted); }

.sig svg { width: 12px; height: 12px; fill: var(--kw); }

.totop { margin-left: auto; }

@media (max-width: 1080px) {
  .split, .split.flip { grid-template-columns: 1fr; gap: 24px; }
  .split.flip .viewport { order: 0; }
  .cards { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .ide { grid-template-columns: 1fr; }
  .explorer { display: none; }
  .statgrid { grid-template-columns: 1fr 1fr; }
  .menubar { gap: 0; }
  .menubar a { font-size: 11.5px; padding: 5px 7px; }
  .title-text { display: none; }
  .block { padding: 38px 20px 24px; }
  .exp-row { grid-template-columns: 1fr auto; }
  .exp-genre { display: none; }
}

@media (max-width: 560px) {
  .cards, .steps, .statgrid { grid-template-columns: 1fr; }
  .winbtns { display: none; }
}