:root {
  color-scheme: light;
  --bg: #fbfaf6;
  --surface: #ffffff;
  --surface-2: #f2efe6;
  --code-bg: #f4f1e8;
  --text: #1d2430;
  --muted: #586071;
  --line: #ddd7c8;
  --accent: #0b6e6e;
  --accent-soft: #dcefee;
  --on-accent: #ffffff;
  --warn: #8a5300;
  --warn-soft: #fbefd6;
  --bad: #a4262c;
  --bad-soft: #f8e2e3;
  --good: #25663a;
  --good-soft: #e0f1e5;
  --tok-keyword: #8a2b9b;
  --tok-string: #1c6b3a;
  --tok-comment: #6b7280;
  --tok-func: #0a58a8;
  --tok-number: #a34a00;
  --tok-name: #0b6e6e;
  --seg1: #cfe6f6;
  --seg2: #f6e1be;
  --seg3: #e2d3f3;
  --seg4: #cdeed4;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #12161d;
    --surface: #1a2029;
    --surface-2: #222a36;
    --code-bg: #0f131a;
    --text: #e6e9ef;
    --muted: #a0a9b8;
    --line: #2d3644;
    --accent: #5fcaca;
    --accent-soft: #163a3c;
    --on-accent: #0b1a1a;
    --warn: #f0b34d;
    --warn-soft: #3a2c10;
    --bad: #ff8f95;
    --bad-soft: #3d1b1e;
    --good: #7fd49a;
    --good-soft: #14301f;
    --tok-keyword: #d79bef;
    --tok-string: #8fd9a8;
    --tok-comment: #8b94a5;
    --tok-func: #7db8f5;
    --tok-number: #f2a864;
    --tok-name: #5fcaca;
  --seg1: #1f4560;
  --seg2: #5a4219;
  --seg3: #46316a;
  --seg4: #1f5133;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #12161d;
    --surface: #1a2029;
    --surface-2: #222a36;
    --code-bg: #0f131a;
    --text: #e6e9ef;
    --muted: #a0a9b8;
    --line: #2d3644;
    --accent: #5fcaca;
    --accent-soft: #163a3c;
    --on-accent: #0b1a1a;
    --warn: #f0b34d;
    --warn-soft: #3a2c10;
    --bad: #ff8f95;
    --bad-soft: #3d1b1e;
    --good: #7fd49a;
    --good-soft: #14301f;
    --tok-keyword: #d79bef;
    --tok-string: #8fd9a8;
    --tok-comment: #8b94a5;
    --tok-func: #7db8f5;
    --tok-number: #f2a864;
    --tok-name: #5fcaca;
  --seg1: #1f4560;
  --seg2: #5a4219;
  --seg3: #46316a;
  --seg4: #1f5133;
}

/* settings panel */
.settings { position: fixed; top: 12px; right: 12px; z-index: 50; font-size: 15px; }
.settings-toggle {
  display: inline-flex; align-items: center; gap: 8px; font: inherit; font-weight: 700;
  background: var(--surface); color: var(--text); border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 14px; cursor: pointer; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}
.settings-toggle:hover { border-color: var(--accent); }
.settings-toggle svg { width: 16px; height: 16px; }
.settings-panel {
  position: absolute; top: 46px; right: 0; width: min(320px, calc(100vw - 24px));
  background: var(--surface); color: var(--text); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px 12px; box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
}
.settings-panel[hidden] { display: none; }
.settings-panel fieldset { border: none; padding: 0; margin: 0 0 12px; }
.settings-panel legend { font-weight: 700; font-size: 13px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding: 0; margin-bottom: 4px; }
.settings-panel label { display: block; padding: 3px 0; cursor: pointer; }
.settings-panel input { margin-right: 8px; accent-color: var(--accent); }
.settings-panel .reset { font: inherit; font-size: 14px; background: none; color: var(--accent); border: none; padding: 0; cursor: pointer; text-decoration: underline; }
a.svg-dl { white-space: nowrap; }

/* reading settings, applied by data attributes on the html element */
html[data-text="large"] body { font-size: 19.5px; }
html[data-text="large"] .why { font-size: 17.5px; }
html[data-text="large"] pre.code { font-size: 14.5px; }
html[data-text="large"] .chunk pre.code { font-size: 14px; }
html[data-wrap="off"] .chunk pre.code { white-space: pre; overflow-wrap: normal; }
html[data-motion="reduce"] { scroll-behavior: auto; }
html[data-motion="reduce"] *, html[data-motion="reduce"] *::before, html[data-motion="reduce"] *::after { transition: none !important; animation: none !important; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}
@media (max-width: 1000px) { .settings-toggle span { display: none; } .settings-toggle { padding: 8px 10px; } }

/* ---------- Workbench layout ---------- */

html { --code-size: 13px; --timeline-height: 252px; }
html[data-text="large"] { --code-size: 15px; }
body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
body.dragging { user-select: none; cursor: col-resize; }
#busy { position: fixed; bottom: 12px; left: 12px; padding: 6px 12px; background: var(--surface); border: 1px solid var(--accent); border-radius: 8px; z-index: 60; font-weight: 700; }
#busy:empty { display: none; }
button { font: inherit; }
code, .mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
h1, h2, h3, h4 { margin: 0; }

.wb-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px;
  padding: 6px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.wb-head .title h1 { font-size: 1.15rem; line-height: 1.2; }
.wb-head .title p { margin: 0; color: var(--muted); font-size: 0.85em; }
.wb-head .controls { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-left: auto; align-items: center; }
.settings-toggle { padding: 5px 12px !important; }
.ctl { display: flex; align-items: center; gap: 8px; }
.ctl-label { font-size: 0.78em; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); }
.settings { position: relative; top: auto; right: auto; }
.wb-head .home { color: var(--muted); font-size: 0.9em; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg); }
.seg button { border: none; background: transparent; color: var(--text); padding: 5px 11px; cursor: pointer; border-right: 1px solid var(--line); }
.seg button:last-child { border-right: none; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); font-weight: 700; }
.seg button:hover:not([aria-pressed="true"]) { background: var(--accent-soft); }
button:focus-visible, .splitter:focus-visible, textarea:focus-visible, input:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.helpline { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 16px; padding: 6px 16px; background: var(--accent-soft); color: var(--text); font-size: 0.9em; border-bottom: 1px solid var(--line); position: relative; z-index: 30; }
.helpline p { margin: 0; }
.try { position: relative; }
.try summary { cursor: pointer; font-weight: 700; color: var(--accent); }
.try-panel { position: absolute; right: 0; top: 30px; width: min(620px, 92vw); max-height: 70vh; overflow: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28); padding: 12px 16px; }
.try-panel p { margin: 0 0 6px; color: var(--muted); }
.try-panel ol { margin: 0; padding-left: 20px; }
.try-panel li { margin-bottom: 8px; }
.helpline p > span + span::before { content: "  \00b7  "; white-space: pre; }

.viewtabs { display: none; }

.wb-main {
  flex: 1; min-height: 0;
  display: grid; grid-template-columns: var(--col-left, minmax(0, 1fr)) 8px minmax(0, 1fr);
}

.pane { display: grid; grid-template-rows: auto var(--top-height, 50%) 8px minmax(0, 1fr); min-height: 0; min-width: 0; background: var(--bg); }
#pane-left { --top-height: 56%; }
#pane-right { --top-height: 40%; }
.pane-title { padding: 6px 12px; font-size: 0.8em; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line); background: var(--surface-2); }
.pane-title b { color: var(--text); }
.pane-top { min-height: 0; display: flex; flex-direction: column; background: var(--surface); }

.splitter { background: var(--line); position: relative; flex: none; }
.splitter.v { cursor: col-resize; }
.splitter.h { cursor: row-resize; height: 8px; }
.splitter:hover, .splitter:focus-visible { background: var(--accent); }
.splitter::after { content: ""; position: absolute; inset: 0; margin: auto; background: var(--muted); opacity: 0.6; border-radius: 2px; }
.splitter.v::after { width: 2px; height: 28px; }
.splitter.h::after { height: 2px; width: 28px; }

/* Browser */
.chrome { display: flex; align-items: center; gap: 6px; padding: 6px 8px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.chrome button { border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 6px; width: 30px; height: 28px; cursor: pointer; }
.chrome button:disabled { opacity: 0.4; cursor: default; }
.address { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; padding: 3px 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.85em; color: var(--muted); }
#preview { flex: 1; min-height: 0; width: 100%; border: 0; background: #fff; }

/* Server top panel */
.subtabs { display: flex; gap: 2px; padding: 4px 8px 0; background: var(--surface-2); border-bottom: 1px solid var(--line); align-items: flex-end; }
.subtabs button { border: 1px solid transparent; border-bottom: none; background: transparent; color: var(--muted); padding: 5px 12px; border-radius: 6px 6px 0 0; cursor: pointer; }
.subtabs button[aria-selected="true"] { background: var(--surface); color: var(--text); border-color: var(--line); font-weight: 700; margin-bottom: -1px; }
.subtabs .spacer { flex: 1; }
.subtabs .action { margin: 0 0 4px; border: 1px solid var(--line); background: var(--surface); color: var(--text); padding: 3px 10px; border-radius: 6px; }
.panel { flex: 1; min-height: 0; overflow: auto; padding: 10px 12px; }
.panel[hidden] { display: none; }
.panel p { margin: 0 0 8px; }
.db-table { margin-bottom: 14px; }
.db-table h4 { font-size: 0.9em; margin-bottom: 4px; }
.count { color: var(--muted); font-weight: 400; margin-left: 6px; }
.scroll { overflow: auto; max-width: 100%; }
.panel table { border-collapse: collapse; font-size: 0.88em; }
.panel th, .panel td { text-align: left; padding: 3px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.panel th { color: var(--muted); font-weight: 600; }
tr.changed td { animation: flash 2.4s ease-out; }
@keyframes flash { from { background: var(--warn-soft); } to { background: transparent; } }
#sql-form { display: flex; flex-direction: column; gap: 6px; }
#sql-input { font: var(--code-size)/1.4 ui-monospace, Menlo, Consolas, monospace; min-height: 70px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); color: var(--text); resize: vertical; }
#sql-form button { align-self: flex-start; border: none; background: var(--accent); color: var(--on-accent); padding: 5px 14px; border-radius: 6px; cursor: pointer; font-weight: 700; }

/* Code panes */
.code { display: flex; flex-direction: column; min-height: 0; min-width: 0; background: var(--surface); border-top: 1px solid var(--line); }
.code.drop { outline: 3px dashed var(--accent); outline-offset: -3px; }
.code-bar { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 4px 12px; padding: 4px 8px 0; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.tabs { display: flex; flex-wrap: wrap; gap: 2px; min-width: 0; }
.tab { border: 1px solid transparent; border-bottom: none; background: transparent; color: var(--muted); padding: 5px 11px; border-radius: 6px 6px 0 0; cursor: pointer; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.85em; }
.tab.current { background: var(--code-bg); color: var(--text); border-color: var(--line); font-weight: 700; margin-bottom: -1px; }
.tab.locked::after { content: " (read only)"; font-weight: 400; color: var(--muted); font-size: 0.85em; }
.tools { display: flex; flex-wrap: wrap; gap: 4px; padding-bottom: 4px; }
.tools button { border: 1px solid var(--line); background: var(--surface); color: var(--text); padding: 2px 9px; border-radius: 6px; cursor: pointer; font-size: 0.85em; }
.tools button:hover:not(:disabled) { border-color: var(--accent); }
.tools button:disabled { opacity: 0.45; cursor: default; }
.notice, .lock-note, .problem { margin: 0; padding: 5px 12px; font-size: 0.88em; }
.notice { background: var(--warn-soft); color: var(--text); border-bottom: 1px solid var(--line); }
.lock-note { background: var(--surface-2); color: var(--muted); border-bottom: 1px solid var(--line); }
.problem { background: var(--bad-soft); color: var(--bad); border-bottom: 1px solid var(--line); font-weight: 700; }
.notice[hidden], .lock-note[hidden], .problem[hidden], #add-bar[hidden] { display: none; }
#add-bar { display: flex; gap: 6px; padding: 6px 10px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
#add-bar input { flex: 1; min-width: 0; padding: 3px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); }
#add-bar button { border: none; background: var(--accent); color: var(--on-accent); padding: 3px 12px; border-radius: 6px; cursor: pointer; }

.editor { flex: 1; min-height: 0; display: grid; grid-template-columns: 46px minmax(0, 1fr); background: var(--code-bg); }
.ed-gutter { overflow: hidden; background: var(--surface-2); border-right: 1px solid var(--line); color: var(--muted); text-align: right; }
/* The line height is 20px here and as LINE_HEIGHT in wb-editor.js. The marked line depends on both, so change them together. */
.ed-numbers { white-space: pre; padding: 8px 8px 0 4px; font: var(--code-size)/20px ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.ed-stage { position: relative; overflow: hidden; }
.ed-colour, .ed-input {
  position: absolute; inset: 0; margin: 0; border: 0; padding: 8px 12px 28px;
  font: var(--code-size)/20px ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  white-space: pre; tab-size: 2; letter-spacing: 0; word-spacing: 0; overflow: auto;
}
.ed-colour { overflow: hidden; pointer-events: none; color: var(--text); background: transparent; }
.ed-input { resize: none; background: transparent; color: transparent; caret-color: var(--text); outline: none; -webkit-text-fill-color: transparent; }
.ed-input::selection { background: rgba(70, 130, 210, 0.35); }
.ed-input:focus-visible { outline: none; }
.editor:focus-within { box-shadow: inset 0 0 0 2px var(--accent); }
.ed-band { position: absolute; left: 0; right: 0; top: 0; height: 20px; background: var(--accent-soft); border-left: 3px solid var(--accent); pointer-events: none; z-index: 0; box-shadow: 0 0 0 1px var(--accent) inset; }
.ed-band[hidden] { display: none; }
.editor.read-only .ed-colour { opacity: 0.92; }
/* Prism marks each token with the classes "token" and a kind. We map the kinds onto the site's colour variables. */
.token.keyword, .token.tag, .token.selector, .token.atrule, .token.important { color: var(--tok-keyword); }
.token.string, .token.attr-value, .token.char, .token.template-string { color: var(--tok-string); }
.token.comment, .token.prolog, .token.doctype { color: var(--tok-comment); font-style: italic; }
.token.function, .token.attr-name, .token.property, .token.class-name, .token.builtin { color: var(--tok-func); }
.token.number, .token.boolean, .token.constant, .token.hexcode, .token.unit { color: var(--tok-number); }
.token.variable, .token.parameter { color: var(--tok-name); font-weight: 700; }
.token.punctuation, .token.operator { color: inherit; }

/* Timeline */
#timeline { height: var(--timeline-height); display: flex; flex-direction: column; min-height: 0; background: var(--surface); }
#split-timeline { border-top: 1px solid var(--line); }
.tl-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; padding: 6px 12px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.tl-bar h2 { font-size: 0.8em; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 4px; list-style: none; margin: 0; padding: 0; }
.chips li { padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--muted); font-size: 0.85em; }
.chips li:not(:last-child)::after { content: "\2192"; margin-left: 8px; color: var(--muted); }
.chips li.done { background: var(--accent-soft); color: var(--text); border-color: var(--accent); }
.chips li.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 700; }
.chips li.active::after { color: var(--on-accent); }
.chips li.bad { background: var(--bad); border-color: var(--bad); color: #fff; }
.tl-controls { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; margin-left: auto; font-size: 0.9em; }
.tl-controls button.plain { border: 1px solid var(--line); background: var(--surface); color: var(--text); padding: 3px 12px; border-radius: 6px; cursor: pointer; }
.tl-controls button.plain:not(:disabled):hover { border-color: var(--accent); }
.tl-controls button.plain:disabled { opacity: 0.45; cursor: default; }
#next:not(:disabled) { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 700; }
#tl-state { color: var(--accent); font-weight: 700; min-width: 11ch; }
.logbox { position: relative; }
.logbox summary { cursor: pointer; }
.logbox .log-panel { position: absolute; right: 0; bottom: 28px; width: min(560px, 90vw); height: 220px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25); display: flex; flex-direction: column; z-index: 20; }
.logbox pre { flex: 1; margin: 0; padding: 8px 10px; overflow: auto; font: 12px/1.4 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; }
.logbox .log-panel button { align-self: flex-end; margin: 4px; }

.cards { flex: 1; min-height: 0; display: flex; gap: 10px; padding: 10px 12px; overflow-x: auto; overflow-y: hidden; align-items: stretch; }
.cards:empty::before { content: "Press a button in the page on the left. Each step of the trip appears here. Set the speed to Slow or Step to watch one stage at a time."; color: var(--muted); align-self: center; }
.card { flex: 0 0 min(300px, 78vw); border: 1px solid var(--line); border-radius: 10px; background: var(--bg); padding: 8px 12px; overflow-y: auto; font-size: 0.9em; }
.card.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.card header { font-weight: 700; margin-bottom: 4px; color: var(--accent); }
.card .num { display: inline-block; min-width: 1.5em; text-align: center; border-radius: 999px; background: var(--accent); color: var(--on-accent); margin-right: 4px; }
.card.bad header { color: var(--bad); }
.card.kind-error { border-color: var(--bad); }
.card p { margin: 0 0 6px; }
.card .why { color: var(--muted); font-size: 0.92em; }
.card .quiet { color: var(--muted); }
.card pre.detail { margin: 0 0 6px; padding: 6px 8px; background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; overflow: auto; max-height: 150px; font: 12px/1.4 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; }
.card .result { font-weight: 700; color: var(--good); }
.card .result.bad, .result.bad { color: var(--bad); }
.status.s2 { color: var(--good); font-weight: 700; }
.status.s4, .status.s5 { color: var(--bad); font-weight: 700; }
.mini { font-size: 0.85em; }

/* Narrow screens show one part at a time. */
@media (max-width: 900px) {
  body { height: auto; min-height: 100vh; overflow: auto; }
  .viewtabs { display: flex; gap: 0; border-bottom: 1px solid var(--line); background: var(--surface); }
  .viewtabs button { flex: 1; border: none; border-right: 1px solid var(--line); background: transparent; color: var(--text); padding: 9px 4px; cursor: pointer; }
  .viewtabs button[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); font-weight: 700; }
  .wb-main { display: block; flex: none; }
  .pane { height: 78vh; }
  #split-x, #split-timeline { display: none; }
  body[data-view="browser"] #pane-right, body[data-view="browser"] #timeline,
  body[data-view="server"] #pane-left, body[data-view="server"] #timeline,
  body[data-view="timeline"] #pane-left, body[data-view="timeline"] #pane-right { display: none; }
  #timeline { height: 70vh; }
  .wb-head .controls { margin-left: 0; }
}
@media (max-height: 640px) and (min-width: 901px) { body { height: auto; min-height: 100vh; } .wb-main { min-height: 520px; flex: none; } #timeline { min-height: 220px; } }

.helptools { display: flex; gap: 18px; align-items: center; }
.linkish { border: none; background: none; color: var(--accent); text-decoration: underline; cursor: pointer; padding: 0; }

/* ---------- Stepping controls ---------- */

.stepper { display: inline-flex; align-items: center; gap: 6px; }
#step-pos { min-width: 8.5em; text-align: center; font-weight: 700; font-variant-numeric: tabular-nums; }
.tl-controls button.plain.primary, .intro button.plain.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 700; }
.tl-controls button.plain.primary:disabled { background: transparent; color: var(--text); border-color: var(--line); font-weight: 400; }
.chips li b { font-variant-numeric: tabular-nums; margin-right: 2px; }
.card[hidden] { display: none; }
.card .station { margin: 0 0 2px; font-size: 0.92em; }
.card .station a { color: var(--accent); }
.card .trail { display: flex; flex-direction: column; gap: 0; margin: 0 0 6px; color: var(--muted); font-size: 0.82em; }
.cards:empty::before { content: "Press a button in the page on the left. The request stops at every step. Press Forward to move to the next one, and Back to look at an earlier one."; }

/* ---------- Hover terms ---------- */

.term { border-bottom: 1.5px dotted var(--accent); cursor: help; }
#tip { position: fixed; z-index: 80; max-width: min(300px, 86vw); padding: 8px 10px; border-radius: 8px; background: var(--text); color: var(--bg); font-size: 0.85rem; line-height: 1.4; pointer-events: none; }
#tip[hidden] { display: none; }

/* ---------- The setup screen ---------- */

body.setup .wb-main, body.setup #timeline, body.setup .helpline, body.setup .viewtabs, body.setup .split-timeline, body.setup #split-timeline { visibility: hidden; }
.intro { position: fixed; inset: 0; z-index: 70; overflow: auto; background: var(--bg); display: none; padding: 20px 16px 40px; }
body.setup .intro { display: block; }
.intro-card { max-width: 760px; margin: 0 auto; }
.intro h1 { font-size: 1.5rem; margin-bottom: 4px; }
.intro h2 { font-size: 1.05rem; margin: 22px 0 8px; }
.intro-lead { color: var(--muted); margin: 0 0 14px; }
.intro fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 14px; padding: 8px 14px 12px; background: var(--surface); }
.intro legend { font-weight: 700; padding: 0 6px; }
.opt { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.opt:hover { background: var(--accent-soft); }
.opt input { margin-top: 5px; }
.opt b { display: block; }
.upload-line { display: block; margin: 6px 10px 2px; font-weight: 700; }
.upload-line input { display: block; margin-top: 4px; font-weight: 400; }
.intro .quiet { color: var(--muted); margin: 4px 10px; font-size: 0.9em; }
.intro-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.intro button.plain { border: 1px solid var(--line); background: var(--surface); color: var(--text); padding: 7px 16px; border-radius: 8px; cursor: pointer; }
#intro-saved[hidden], #intro-upload[hidden], #intro-files-view[hidden], #intro-choose[hidden] { display: none; }
.guide-group { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 12px; background: var(--surface); }
.guide-group > h3 { font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 8px 14px; border-bottom: 1px solid var(--line); }
.guide-group ul { list-style: none; margin: 0; padding: 0; }
.guide-group li { display: grid; grid-template-columns: minmax(9em, 12em) 1fr; gap: 4px 14px; padding: 8px 14px; border-bottom: 1px solid var(--line); }
.guide-group li:last-child { border-bottom: none; }
.guide-group code { font-weight: 700; word-break: break-word; }
.guide-group .tag { display: inline-block; margin-left: 6px; padding: 0 7px; border-radius: 999px; background: var(--accent-soft); font-size: 0.78em; font-weight: 400; }
.flow { margin: 0; padding-left: 22px; }
.flow li { margin-bottom: 6px; }
@media (max-width: 640px) { .guide-group li { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .tl-controls { margin-left: 0; max-width: 100%; }
  .stepper { flex-wrap: wrap; justify-content: center; gap: 4px; max-width: 100%; }
  .tl-controls button.plain { padding: 3px 8px; }
  #step-pos { min-width: 0; flex-basis: 100%; order: -1; text-align: left; }
}