/* LegacyTech brand: dark-first navy/white with blue and cyan blocks (see CLAUDE.md for the palette). Layout: brand bar, AI prompter, format presets, option sheets on the left, sticky prompt monitor on the right. */
:root {
  --bg: #F4F6FB; --card: #ffffff; --fg: #0A0F1F; --muted: #4f5878; --line: #d6dcec;
  --accent: #2F6FEB; --accent-fg: #ffffff; --sel-bg: #e7efff; --sel-line: #2F6FEB;
  --blue: #2F6FEB; --cyan: #0B8DB8; --err: #c8321f;
  --ink: #0A0F1F; --ink-fg: #F2F5FF; --ink-muted: #8A94B3; --ink-line: #222a45; --ink-hl: #38D5F0;
  --warn-bg: #fff3d1; --warn-fg: #6a4900;
  --display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --body: "Instrument Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0A0F1F; --card: #111833; --fg: #F2F5FF; --muted: #8A94B3; --line: #222b49;
  --accent: #38D5F0; --accent-fg: #0A0F1F; --sel-bg: #0e2438; --sel-line: #38D5F0;
  --blue: #4F8CFF; --cyan: #38D5F0; --err: #ff7a66;
  --ink: #060a15; --ink-fg: #F2F5FF; --ink-muted: #8A94B3; --ink-line: #1d2540; --ink-hl: #38D5F0;
  --warn-bg: #352b0c; --warn-fg: #f2d37a; color-scheme: dark } }
:root[data-theme="dark"] {
  --bg: #0A0F1F; --card: #111833; --fg: #F2F5FF; --muted: #8A94B3; --line: #222b49;
  --accent: #38D5F0; --accent-fg: #0A0F1F; --sel-bg: #0e2438; --sel-line: #38D5F0;
  --blue: #4F8CFF; --cyan: #38D5F0; --err: #ff7a66;
  --ink: #060a15; --ink-fg: #F2F5FF; --ink-muted: #8A94B3; --ink-line: #1d2540; --ink-hl: #38D5F0;
  --warn-bg: #352b0c; --warn-fg: #f2d37a; color-scheme: dark }

* { box-sizing: border-box; }
body { background: var(--bg); color: var(--fg); font: 15px/1.55 var(--body); }
.stripe { height: 4px; background: linear-gradient(90deg, var(--fg) 0 calc(100% - 96px), var(--blue) calc(100% - 96px) calc(100% - 48px), var(--cyan) calc(100% - 48px)); }
.brandbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brandbar img { display: block; height: 34px; width: auto; }
.brandbar a { color: var(--muted); font: 500 13px var(--mono); letter-spacing: 0.04em; text-decoration: none; }
.brandbar a:hover { color: var(--fg); }
.wrap { max-width: 1280px; margin: 0 auto; padding-block: 24px 64px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: grid; gap: 28px; }
h1 { font: 700 clamp(34px, 6vw, 60px)/1.02 var(--display); letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
h1 em { font-style: normal; color: var(--cyan); }
h2 { font: 600 19px/1.2 var(--display); letter-spacing: -0.005em; margin: 0; }
.lede { color: var(--muted); max-width: 64ch; margin: 14px 0 0; font-size: 16px; }
.step-label { font: 500 12px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; }
.foot { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.foot img { height: 22px; width: auto; display: block; }
.foot a { color: var(--fg); text-underline-offset: 3px; }

.presets { display: grid; gap: 20px; }
.pgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.cat { font: 600 12px var(--body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.preset { all: unset; box-sizing: border-box; cursor: pointer; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; display: grid; gap: 4px; align-content: start; min-width: 0; }
.preset b { font: 600 16px/1.2 var(--display); }
.preset span { color: var(--muted); font-size: 13px; line-height: 1.4; }
.preset i { font: 500 11.5px var(--mono); font-style: normal; color: var(--cyan); letter-spacing: 0.04em; }
.preset[aria-pressed="true"] { background: var(--sel-bg); border-color: var(--sel-line); box-shadow: inset 0 0 0 1px var(--sel-line); }
.preset:focus-visible, .opt:has(input:focus-visible), .seg button:focus-visible, .copy:focus-visible, .ghost:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.main { display: grid; gap: 24px; align-items: start; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 980px) { .main { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); } }
.sheets { display: grid; gap: 16px; min-width: 0; }
.grp { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: grid; gap: 18px; min-width: 0; }
.grp > h2 { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.grp > h2 small { font: 500 11.5px var(--mono); color: var(--muted); letter-spacing: 0.04em; text-transform: none; }
.field { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: 8px; }
.lab { padding: 0; font: 600 12px var(--body); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.hint { margin: 0; font-size: 13px; color: var(--muted); }
.opts { display: flex; flex-wrap: wrap; gap: 8px; }
.opt { position: relative; display: grid; gap: 1px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; cursor: pointer; min-width: 0; max-width: 100%; }
.opt input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.opt b { font: 600 14px/1.3 var(--body); }
.opt small { font-size: 12px; color: var(--muted); line-height: 1.35; }
.opt:has(input:checked) { background: var(--sel-bg); border-color: var(--sel-line); box-shadow: inset 0 0 0 1px var(--sel-line); }
input[type="text"], textarea { width: 100%; font: 15px var(--body); color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; }
textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
input[type="text"]:focus-visible, textarea:focus-visible { outline: 3px solid var(--accent); outline-offset: 1px; }
::placeholder { color: var(--muted); opacity: 0.8; }

.mon { background: var(--ink); color: var(--ink-fg); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; min-width: 0; }
@media (min-width: 980px) { .mon { position: sticky; top: 16px; max-height: calc(100vh - 32px); } }
.mon-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 14px; padding: 12px 16px; border-bottom: 1px solid var(--ink-line); }
.mon-head .t { font: 500 12px var(--mono); letter-spacing: 0.08em; color: var(--ink-muted); display: flex; align-items: center; gap: 8px; }
.mon-head .t::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.mon-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.seg { display: inline-flex; border: 1px solid var(--ink-line); border-radius: 8px; overflow: hidden; }
.seg button { all: unset; box-sizing: border-box; cursor: pointer; padding: 6px 12px; font: 500 12px var(--mono); color: var(--ink-muted); letter-spacing: 0.04em; }
.seg button[aria-pressed="true"] { background: var(--ink-fg); color: var(--ink); }
.copy { font: 600 15px var(--display); letter-spacing: 0.01em; background: var(--accent); color: var(--accent-fg); border: 0; border-radius: 8px; padding: 9px 18px; cursor: pointer; }
.ghost { font: 600 13px var(--body); background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.facts { padding: 12px 16px; border-bottom: 1px solid var(--ink-line); display: grid; gap: 10px; }
.facts h3 { margin: 0 0 6px; font: 500 11px var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.chips li { font: 500 12px var(--mono); border: 1px solid var(--ink-line); border-radius: 6px; padding: 3px 8px; color: var(--ink-fg); }
.warns { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.warns li { background: var(--warn-bg); color: var(--warn-fg); border-radius: 6px; padding: 6px 10px; font-size: 13px; line-height: 1.4; }
pre { margin: 0; padding: 16px 16px 22px; font: 12.5px/1.65 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; overflow: auto; flex: 1; min-height: 280px; max-height: 62vh; }
@media (min-width: 980px) { pre { max-height: none; } }
.ph { color: var(--ink-hl); font-weight: 500; }
.stats { font: 500 12px var(--mono); color: var(--ink-muted); }
.note { color: var(--muted); font-size: 13px; margin: 0; max-width: 80ch; }
.dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--card); border-top: 1px solid var(--line); padding-top: 10px; padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px)); padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.dock .stats { color: var(--muted); }
@media (min-width: 980px) { .dock { display: none; } }
@media (max-width: 979px) { .wrap { padding-bottom: 96px; } }
@media (prefers-reduced-motion: no-preference) { .preset, .opt, .copy { transition: background-color .12s, border-color .12s; } .copy:hover { filter: brightness(1.08); } }

/* AI prompter */
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.ai { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: grid; gap: 12px; }
.ai .step-label { margin: 0; }
.ai form { display: grid; gap: 10px; }
.ai-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.ai-row .copy:disabled { opacity: .55; cursor: progress; }
.ai-status { color: var(--muted); font-size: 13px; }
.ai-status.err { color: var(--err); }
.ai-eg { display: flex; flex-wrap: wrap; gap: 6px; }
.ai-eg button, .ai-alt button { all: unset; box-sizing: border-box; cursor: pointer; font: 500 12.5px var(--body); color: var(--muted); border: 1px dashed var(--line); border-radius: 999px; padding: 4px 11px; }
.ai-eg button:hover, .ai-alt button:hover { color: var(--fg); border-color: var(--muted); }
.ai-eg button:focus-visible, .ai-alt button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.ai-result { background: var(--sel-bg); border: 1px solid var(--sel-line); border-radius: 10px; padding: 14px 16px; display: grid; gap: 10px; }
.ai-result h3 { margin: 0; font: 600 17px/1.2 var(--display); }
.ai-result p { margin: 0; }
.ai-chg { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.ai-chg li { font: 500 12px var(--mono); border: 1px solid var(--sel-line); border-radius: 6px; padding: 3px 8px; background: var(--card); }
.ai-alt { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.ai-result .ghost { justify-self: start; }

/* base reset (was inline in the original single-file page) */
html { scroll-padding-top: env(safe-area-inset-top, 0px); }
body { margin: 0; padding: 0; }
img { max-width: 100%; }
[hidden]:not([hidden="until-found" i]) { display: none !important; }

/* Tabs and guide */
.view { display: grid; gap: 28px; min-width: 0; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-top: -8px; }
.tabs button { all: unset; box-sizing: border-box; cursor: pointer; padding: 10px 16px; font: 600 15px var(--display); color: var(--muted); border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tabs button:hover { color: var(--fg); }
.tabs button[aria-selected="true"] { color: var(--fg); border-bottom-color: var(--cyan); }
.tabs button:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; border-radius: 6px; }
body.on-guide .dock { display: none; }
@media (max-width: 979px) { body.on-guide .wrap { padding-bottom: 64px; } }
.guide { display: grid; gap: 24px; align-items: start; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 980px) { .guide { grid-template-columns: 220px minmax(0, 1fr); } }
.toc { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 14px; }
.toc .step-label { flex-basis: 100%; margin: 0; }
.toc a { color: var(--muted); text-decoration: none; padding: 4px 0; }
.toc a:hover { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; }
@media (min-width: 980px) { .toc { position: sticky; top: 16px; flex-direction: column; flex-wrap: nowrap; gap: 2px; border-left: 2px solid var(--line); padding-left: 14px; } }
.md { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: clamp(16px, 3vw, 32px); min-width: 0; }
.md:focus { outline: none; }
.md h1 { font-size: clamp(26px, 4vw, 36px); margin: 0 0 6px; }
.md h2 { font-size: 22px; margin: 36px 0 10px; padding-top: 20px; border-top: 1px solid var(--line); scroll-margin-top: 16px; }
.md h3 { font: 600 17px/1.3 var(--display); margin: 22px 0 6px; scroll-margin-top: 16px; }
.md h1 + p, .md p { max-width: 75ch; }
.md h1 + p { color: var(--muted); font: 500 13px var(--mono); margin: 0 0 14px; }
.md code { font: 13px var(--mono); background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
.md pre { background: var(--ink); color: var(--ink-fg); border-radius: 8px; padding: 14px; min-height: 0; max-height: none; }
.md pre code { background: none; border: 0; padding: 0; }
.md a { color: var(--accent); text-underline-offset: 3px; }
.md blockquote { margin: 12px 0; padding: 4px 14px; border-left: 3px solid var(--cyan); color: var(--muted); }
.md-table { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: 8px; }
.md-table table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: 14px; }
.md-table th, .md-table td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--line); }
.md-table thead th { font: 600 12px var(--body); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); background: var(--bg); white-space: nowrap; }
.md-table tbody tr:last-child td { border-bottom: 0; }
.md-table td:first-child { font-weight: 600; min-width: 150px; }
.md-table td:nth-child(3) { color: var(--muted); }
.md-err { color: var(--err); }