/* Dark is the default; light comes from the system or the toggle (html[data-theme]). */
:root {
  color-scheme: dark;
  --ground: #0E1116;
  --panel: #131820;
  --raise: #1A2029;
  --sunk: #0B0E12;
  --line: #252C36;
  --edge: #2E3643;
  --text: #E6E9EE;
  --text2: #C9D0DA;
  --muted: #9AA4B2;
  --warn: #F2B84B;
  --work: #5CC8E8;
  --work-hover: #8FDBF2;
  --ok: #63D297;
  --on-accent: #0B1A20;
  --on-warn: #1A1300;
  --rail: rgba(14, 17, 22, 0.92);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --ground: #F6F7F9;
    --panel: #FFFFFF;
    --raise: #EDF0F4;
    --sunk: #FFFFFF;
    --line: #DDE2E8;
    --edge: #C9D0DA;
    --text: #161B22;
    --text2: #3A4350;
    --muted: #5A6472;
    --warn: #9A5B00;
    --work: #0A6E8A;
    --work-hover: #0B5870;
    --ok: #1D7A44;
    --on-accent: #FFFFFF;
    --on-warn: #FFFFFF;
    --rail: rgba(246, 247, 249, 0.92);
    --shadow: 0 18px 40px rgba(22, 27, 34, 0.12);
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --ground: #F6F7F9;
  --panel: #FFFFFF;
  --raise: #EDF0F4;
  --sunk: #FFFFFF;
  --line: #DDE2E8;
  --edge: #C9D0DA;
  --text: #161B22;
  --text2: #3A4350;
  --muted: #5A6472;
  --warn: #9A5B00;
  --work: #0A6E8A;
  --work-hover: #0B5870;
  --ok: #1D7A44;
  --on-accent: #FFFFFF;
  --on-warn: #FFFFFF;
  --rail: rgba(246, 247, 249, 0.92);
  --shadow: 0 18px 40px rgba(22, 27, 34, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--ground); color: var(--text); font-family: var(--sans); font-size: 17px; line-height: 1.6; }
a { color: var(--work); }
a:not(.btn):hover { color: var(--work-hover); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--work); outline-offset: 3px; border-radius: 4px; }
code { font-family: var(--mono); font-size: 0.88em; background: var(--raise); padding: 1px 6px; border-radius: 5px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--work); color: var(--on-accent); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 16px; z-index: 10; }
a.skip:hover { color: var(--on-accent); }

.rail { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; padding: 14px clamp(16px, 4vw, 48px); background: var(--rail); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; }
.rail-nav { display: flex; gap: 20px; flex-wrap: wrap; flex: 1; }
.rail-nav a, .rail-link { color: var(--muted); text-decoration: none; font-size: 15px; }
.rail-nav a:hover, .rail-link:hover { color: var(--text); }
.rail-nav a[aria-current] { color: var(--text); }
.rail-toggle, .rail-nav .rail-nav-extra { display: none; }
@media (max-width: 760px) {
  /* Phones: one row, "Tower / <section in view>", which opens into every section. */
  html { scroll-padding-top: 84px; }
  .rail { gap: 0 12px; }
  .rail.open { padding-bottom: 0; }
  .rail-link { display: none; }
  .rail-toggle { display: inline-flex; align-items: center; gap: 6px; flex: 1; min-width: 0; min-height: 40px; padding: 0; border: none; background: none; color: var(--text); font: inherit; font-size: 16px; cursor: pointer; }
  .rail-toggle::before { content: "/"; color: var(--muted); }
  .rail-current { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .rail-toggle svg { flex: none; width: 16px; height: 16px; color: var(--muted); transition: transform 0.15s; }
  .rail.open .rail-toggle svg { transform: rotate(180deg); }
  .rail-nav { display: none; order: 1; flex: 1 0 100%; flex-direction: column; gap: 0; margin: 14px calc(-1 * clamp(16px, 4vw, 48px)) 0; border-top: 1px solid var(--line); }
  .rail.open .rail-nav { display: flex; }
  .rail-nav a, .rail-nav .rail-nav-extra { display: block; padding: 13px clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--line); font-size: 16px; }
  .rail-nav a:last-child { border-bottom: none; }
  .rail-nav a[aria-current] { font-weight: 600; }
}

main { max-width: 1180px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); }

/* The intro sits above the live demo, centered, so the demo is what the page leads with. */
.intro { max-width: 900px; margin: 0 auto; padding: clamp(40px, 7vw, 80px) 0 28px; text-align: center; }
.intro .lede { margin: 0 auto 24px; }
.install-line { display: flex; align-items: center; gap: 8px; max-width: 760px; margin: 0 auto; padding: 8px 8px 8px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--sunk); text-align: left; }
.install-line code { flex: 1; min-width: 0; white-space: normal; overflow-wrap: anywhere; background: none; padding: 0; font-size: 14px; line-height: 1.5; }
.copy-inline { flex: none; min-height: 36px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--edge); background: var(--panel); color: var(--text); font: inherit; font-size: 14px; cursor: pointer; }
.copy-inline:hover { background: var(--raise); }
.intro-after { margin: 14px 0 0; color: var(--muted); font-size: 15px; }
.eyebrow { margin: 0 0 10px; color: var(--work); font-family: var(--mono); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { margin: 0 0 20px; font-size: clamp(36px, 5vw, 56px); line-height: 1.08; letter-spacing: -0.02em; }
.lede { margin: 0 0 28px; color: var(--text2); font-size: 19px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 20px; border-radius: 10px; border: 1px solid var(--edge); color: var(--text); text-decoration: none; font-weight: 600; }
.btn:hover { color: var(--text); background: var(--raise); }
.btn-primary { background: var(--work); border-color: var(--work); color: var(--on-accent); }
a.btn-primary:hover, a.btn-primary:focus-visible { background: var(--work-hover); color: var(--on-accent); }

.pane { margin: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--sunk); box-shadow: var(--shadow); font-family: var(--mono); font-size: 13px; line-height: 1.7; }
.pane-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px; background: var(--panel); border-bottom: 1px solid var(--line); }
.pane-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--edge); }
.pane-bar b { margin-left: 8px; color: var(--muted); font-weight: 500; }
.pane-body { padding: 14px 16px; overflow-x: auto; }
.pane-body p { margin: 0; white-space: pre; }
.pane-body i { font-style: normal; color: var(--muted); }
.pane-body .r { float: right; }
.pane-head i { color: var(--muted); }
.pane-body em { font-style: normal; }
.row.sel { background: var(--raise); border-radius: 6px; padding: 6px 8px; margin: 2px -8px; }
.rule { border-top: 1px solid var(--line); margin: 8px 0 !important; }
.warn { color: var(--warn); }
.work { color: var(--work); }
.ok { color: var(--ok); }
.dim { color: var(--muted); }
.key { color: var(--on-warn); background: var(--warn); border-radius: 3px; padding: 1px 4px; }
.key2 { color: var(--text); }
.input { margin-top: 6px !important; padding: 4px 8px; border: 1px solid var(--edge); border-radius: 6px; color: var(--muted); }
.pane-status { padding: 8px 16px; border-top: 1px solid var(--line); background: var(--panel); color: var(--muted); white-space: nowrap; overflow-x: auto; }

.band { padding: 64px 0; border-top: 1px solid var(--line); }
h2 { margin: 0 0 12px; font-size: clamp(28px, 3.4vw, 38px); line-height: 1.15; letter-spacing: -0.01em; }
.sub { margin: 0 0 32px; color: var(--text2); max-width: 40em; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 16px; }
.card { padding: 22px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); }
.card h3 { margin: 0 0 8px; font-family: var(--mono); font-size: 22px; }
.card p { margin: 0; color: var(--text2); font-size: 16px; }
.card .tag { margin: 0 0 10px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
.card .tag.work { color: var(--work); }
.card .tag.warn { color: var(--warn); }
.card .tag.ok { color: var(--ok); }

/* The answer flow: four steps drawn as small pieces of UI, joined by arrows when they sit in a row. */
.flow { margin: 0 0 28px; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 28px; }
.flow-step { position: relative; display: flex; flex-direction: column; gap: 10px; padding: 18px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); }
.flow-step + .flow-step::before { content: "→"; position: absolute; left: -22px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 18px; }
@media (max-width: 1000px) { .flow-step + .flow-step::before { content: none; } }
.flow-who { margin: 0; display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--text); }
.flow-who b { font-family: var(--mono); font-weight: 500; }
.dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.dot.work { background: var(--work); }
.dot.warn { background: var(--warn); }
.dot.ok { background: var(--ok); }
.dot.you { background: var(--text); }
.flow-shot { min-height: 52px; display: flex; align-items: center; padding: 10px 12px; border-radius: 10px; background: var(--sunk); border: 1px solid var(--line); font-family: var(--mono); font-size: 13px; color: var(--text); overflow-wrap: anywhere; }
.flow-shot code { background: none; padding: 0; font-size: inherit; }
.flow-shot-warn { color: var(--warn); border-color: var(--warn); }
.flow-shot-ok { color: var(--ok); border-color: var(--ok); }
.flow-buttons { gap: 8px; font-family: var(--sans); }
.fake-btn { display: inline-flex; align-items: center; min-height: 32px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--edge); font-size: 14px; font-weight: 600; }
.fake-primary { background: var(--warn); border-color: var(--warn); color: var(--on-warn); }
.flow-say { margin: 0; color: var(--text2); font-size: 15px; line-height: 1.5; }

.modes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 16px; }
.mode { padding: 16px 18px; border-radius: 12px; border: 1px dashed var(--edge); }
.mode h3 { margin: 0 0 6px; font-size: 16px; }
.mode p { margin: 0; color: var(--text2); font-size: 15px; }

.features { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 12px 32px; }
.features li { padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--text2); }
.features b { color: var(--text); }

.code { position: relative; border-radius: 12px; background: var(--sunk); border: 1px solid var(--line); }
.code pre { margin: 0; padding: 20px; overflow-x: auto; font-family: var(--mono); font-size: 15px; line-height: 1.8; }
.code pre code { background: none; padding: 0; font-size: inherit; }
.copy { position: absolute; top: 10px; right: 10px; min-height: 36px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--edge); background: var(--panel); color: var(--text); font: inherit; font-size: 14px; cursor: pointer; }
.copy:hover { background: var(--raise); }
.note { margin: 16px 0 0; color: var(--muted); font-size: 15px; }

.foot { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; padding: 32px 16px 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.foot a { color: var(--muted); }
.foot a:hover { color: var(--text); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.theme-switch { display: inline-flex; gap: 2px; padding: 3px; border-radius: 10px; background: var(--raise); border: 1px solid var(--line); }
.theme-switch button { display: inline-flex; align-items: center; gap: 6px; min-height: 34px; padding: 0 10px; border: none; border-radius: 7px; background: transparent; color: var(--muted); font: inherit; font-size: 14px; cursor: pointer; }
.theme-switch button:hover { color: var(--text); }
.theme-switch button[aria-pressed="true"] { background: var(--panel); color: var(--text); box-shadow: 0 0 0 1px var(--line); }
.theme-switch svg { width: 16px; height: 16px; }
@media (max-width: 640px) { .theme-switch span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); } }




/* The live cockpit: breaks out of the text column to show the mockup at real size. */
.live { width: min(1440px, calc(100vw - 32px)); margin: 0 0 36px; position: relative; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 10px; }
.live-bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; align-items: baseline; color: var(--text2); font-size: 15px; }
.live-bar b { color: var(--text); }
.live-frame { position: relative; overflow: hidden; border-radius: 14px; border: 1px solid var(--line); background: var(--sunk); }
.live-frame iframe { position: absolute; top: 0; left: 0; width: 1440px; height: 900px; border: 0; transform-origin: 0 0; }

kbd { font-family: var(--mono); font-size: 0.82em; padding: 1px 6px; border: 1px solid var(--edge); border-bottom-width: 2px; border-radius: 5px; background: var(--panel); color: var(--text); }
#demo { margin-bottom: 8px; }
.term { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); gap: 32px; align-items: start; }
.term .cards { grid-template-columns: 1fr; }
.setup { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.setup li { color: var(--text2); font-size: 16px; }
.setup b { color: var(--text); }

#help h3 { margin: 32px 0 8px; font-size: 20px; }
#help p { margin: 0 0 12px; max-width: 760px; color: var(--text2); }
#help .code { margin: 0 0 16px; max-width: 760px; }
#help .setup { margin: 0 0 20px; }
.os-switch { display: inline-flex; gap: 2px; padding: 3px; margin: 0 0 12px; border-radius: 10px; background: var(--raise); border: 1px solid var(--line); }
.os-switch button { min-height: 34px; padding: 0 12px; border: none; border-radius: 7px; background: transparent; color: var(--muted); font: inherit; font-size: 14px; cursor: pointer; }
.os-switch button:hover { color: var(--text); }
.os-switch button[aria-pressed="true"] { background: var(--panel); color: var(--text); box-shadow: 0 0 0 1px var(--line); }
.intro .os-switch { margin: 14px 0 0; }
.os-note { max-width: 760px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
[data-cmd] { white-space: pre-line; }
.install-line code[data-cmd] { white-space: pre-line; }

@media (max-width: 360px) {
  /* The smallest phones: the logo alone leaves the breadcrumb room, and "Claude Code agent." stays inside the screen. */
  .brand span { display: none; }
  .theme-switch button { padding: 0 7px; }
  h1 { font-size: 30px; }
}