/* Unprose website — tokens from docs/DESIGN-SYSTEM.md (paper, graphite chrome, marker blue, IBM Plex). */
:root {
  --paper: #fbfbf9;
  --chrome: #f0f1f0;
  --chrome-2: #e6e8e6;
  --ink: #161a1f;
  --ink-2: #444b53;
  --ink-3: #6b727a;
  --rule: #cfd3d6;
  --rule-2: #aeb4b9;
  --marker: #1f56d6;
  --marker-ink: #ffffff;
  --marker-soft: #e3ebfb;
  --agent: #6e3fc4;
  --user: #1b7f5a;
  --code: #eef0ee;
  --shadow-lift: 0 2px 6px rgba(22, 26, 31, 0.1);
  --c-orange: #ffb648;
  --c-blue: #7dbdff;
  --c-yellow: #ffe14a;
  --c-lilac: #d4b4ff;
  --c-green: #9fe39a;
  --c-pink: #ffb0cf;
  --font: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', 'PingFang TC', 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --wrap: 1160px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --paper: #1b2027;
    --chrome: #12161b;
    --chrome-2: #1a1f26;
    --ink: #e8eaec;
    --ink-2: #b7bcc3;
    --ink-3: #8a9099;
    --rule: #2e353d;
    --rule-2: #414a54;
    --marker: #7ea2ff;
    --marker-ink: #0b1a3d;
    --marker-soft: #1d2a45;
    --agent: #b899f2;
    --user: #67cfa3;
    --code: #232931;
    --shadow-lift: 0 2px 8px rgba(0, 0, 0, 0.45);
    --c-orange: #d9922e;
    --c-blue: #4f8fd8;
    --c-yellow: #d6ba22;
    --c-lilac: #a07bd9;
    --c-green: #66b664;
    --c-pink: #d67aa2;
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --paper: #1b2027;
  --chrome: #12161b;
  --chrome-2: #1a1f26;
  --ink: #e8eaec;
  --ink-2: #b7bcc3;
  --ink-3: #8a9099;
  --rule: #2e353d;
  --rule-2: #414a54;
  --marker: #7ea2ff;
  --marker-ink: #0b1a3d;
  --marker-soft: #1d2a45;
  --agent: #b899f2;
  --user: #67cfa3;
  --code: #232931;
  --shadow-lift: 0 2px 8px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--font); overflow-wrap: break-word; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--marker); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--marker); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { margin: 0; line-height: 1.2; font-weight: 600; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.45rem, 1.15rem + 1.2vw, 1.9rem); }
h3 { font-size: 1.08rem; }
p { margin: 0; }
code, pre, kbd { font-family: var(--mono); }
code { font-size: 0.9em; background: var(--code); padding: 0.08em 0.32em; border-radius: 4px; }
pre { margin: 0; background: var(--code); border: 1px solid var(--rule); border-radius: 4px; padding: 12px 14px; overflow-x: auto; font-size: 0.86rem; line-height: 1.55; }
pre code { background: none; padding: 0; font-size: inherit; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 760px) { .wrap { padding: 0 32px; } }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 8px; top: -48px; background: var(--paper); color: var(--ink); padding: 8px 12px; border: 1px solid var(--rule-2); border-radius: 4px; z-index: 10; }
.skip:focus { top: 8px; }
.muted { color: var(--ink-2); }

/* header */
.site-header { position: sticky; top: 0; z-index: 5; background: var(--chrome); border-bottom: 1px solid var(--rule); }
.site-header .wrap { display: flex; align-items: center; gap: 12px 20px; min-height: 52px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 1.02rem; }
.site-nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: 0 18px; }
.site-nav a { color: var(--ink-2); text-decoration: none; font-size: 0.92rem; padding: 12px 0; display: inline-block; }
.site-nav a:hover, .site-nav a[aria-current='page'] { color: var(--ink); text-decoration: underline; text-underline-offset: 6px; }
.site-nav .wide { display: none; }
@media (min-width: 860px) { .site-nav .wide { display: inline-block; } }

/* hero */
.hero { padding: 48px 0 28px; }
@media (min-width: 760px) { .hero { padding: 80px 0 36px; } }
.hero h1 { font-size: clamp(2rem, 1.35rem + 2.9vw, 3.3rem); letter-spacing: -0.02em; max-width: 26ch; }
.hero .lede { margin-top: 20px; font-size: clamp(1.05rem, 0.98rem + 0.35vw, 1.22rem); color: var(--ink-2); max-width: 60ch; }
.hero .lede strong { color: var(--ink); font-weight: 600; }
.works-with { margin-top: 16px; color: var(--ink-3); font-size: 0.92rem; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 10px 18px; border-radius: 4px; font-weight: 500; text-decoration: none; border: 1px solid transparent; font-size: 0.97rem; }
.btn-primary { background: var(--marker); color: var(--marker-ink); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--rule-2); color: var(--ink); background: var(--paper); }
.btn-ghost:hover { background: var(--chrome); }

/* screenshots */
.shot { margin: 0; }
.frame { display: block; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; background: #fbfbf9; }
.shot.lift .frame { box-shadow: var(--shadow-lift); }
.shot figcaption { margin-top: 10px; color: var(--ink-2); font-size: 0.92rem; max-width: 80ch; }
.frame:focus-visible { outline-offset: 3px; }
.hero-shot { padding-bottom: 8px; }

/* sections */
.block { padding: 56px 0; border-top: 1px solid var(--rule); }
@media (min-width: 760px) { .block { padding: 80px 0; } }
.section-head { max-width: 68ch; margin-bottom: 32px; }
.section-head p { margin-top: 12px; color: var(--ink-2); font-size: 1.03rem; }

/* principles */
.principles { list-style: none; margin: 0; padding: 0; display: grid; gap: 24px 28px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .principles { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .principles { grid-template-columns: repeat(4, 1fr); } }
.principles li { min-width: 0; }
.principles h3 { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.swatch { width: 12px; height: 12px; border-radius: 2px; flex: none; background: var(--c, var(--c-orange)); box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12); }
.principles p { color: var(--ink-2); font-size: 0.97rem; }

/* how it goes */
.how { display: grid; gap: 32px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 920px) { .how { grid-template-columns: 1fr 1fr; gap: 48px; } }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; display: grid; gap: 26px; }
.steps > li { counter-increment: step; position: relative; padding-left: 44px; min-width: 0; }
.steps > li::before { content: counter(step); position: absolute; left: 0; top: -2px; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--ink); display: grid; place-items: center; font-size: 0.86rem; font-weight: 600; }
.steps h3 { margin-bottom: 6px; }
.steps p { color: var(--ink-2); }
.steps p + p, .steps blockquote + p { margin-top: 8px; }
.steps blockquote { margin: 0; padding: 6px 12px; border-left: 3px solid var(--user); background: var(--chrome); color: var(--ink); border-radius: 0 4px 4px 0; font-size: 0.95rem; }
.receipts { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 0; padding: 0; list-style: none; }
.receipts li { display: inline-block; font-size: 0.82rem; border: 1px solid var(--rule-2); border-radius: 4px; padding: 1px 8px; color: var(--ink-2); }
.how .shot { max-width: 520px; }
@media (min-width: 920px) { .how .shot { justify-self: end; } }

/* diagrams */
.gallery { display: grid; gap: 48px; }
@media (min-width: 900px) { .gallery { gap: 64px; } }
.diagram { min-width: 0; display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); align-items: center; }
@media (min-width: 900px) {
  .diagram { grid-template-columns: minmax(0, 1fr) minmax(0, 2.1fr); gap: 40px; }
  .diagram:nth-child(even) { grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr); }
  .diagram:nth-child(even) .diagram-text { order: 2; }
}
.diagram-text { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.diagram h3 { display: flex; align-items: center; gap: 10px; font-size: 1.18rem; }
.diagram p { color: var(--ink-2); }
.diagram .file { font-family: var(--mono); font-size: 0.82rem; color: var(--ink-3); }
.diagram .frame img { width: 100%; }
.note { margin-top: 32px; color: var(--ink-2); max-width: 80ch; }
.note code { white-space: nowrap; }

/* agents */
.features { list-style: none; margin: 0; padding: 0; display: grid; gap: 24px 32px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .features { grid-template-columns: 1fr 1fr; } }
.features li { border-left: 3px solid var(--rule, #ccc); padding: 2px 0 2px 16px; min-width: 0; }
.features li.agent { border-left-color: var(--agent); }
.features li.user { border-left-color: var(--user); }
.features h3 { margin-bottom: 6px; }
.features p { color: var(--ink-2); font-size: 0.97rem; }

/* get started */
.start { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .start { grid-template-columns: 1fr 1fr; } }
.card { min-width: 0; border: 1px solid var(--rule); border-radius: 6px; padding: 20px; background: var(--paper); display: flex; flex-direction: column; gap: 12px; }
.card.main { border-color: var(--rule-2); }
@media (min-width: 900px) { .card.main { grid-row: span 2; align-self: start; } }
.card p { color: var(--ink-2); font-size: 0.96rem; }
.card h3 small { font-weight: 400; color: var(--ink-3); font-size: 0.86rem; margin-left: 6px; }
.code { position: relative; }
.copy { position: absolute; top: 6px; right: 6px; font: 500 0.78rem var(--font); color: var(--ink-2); background: var(--paper); border: 1px solid var(--rule-2); border-radius: 4px; padding: 3px 8px; cursor: pointer; min-height: 28px; }
.copy:hover { color: var(--ink); }
.code pre { padding-right: 68px; white-space: pre-wrap; overflow-wrap: anywhere; }
.after { margin-top: 24px; color: var(--ink-2); max-width: 80ch; }

/* what's new */
.news { display: grid; gap: 24px 48px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 900px) { .news { grid-template-columns: 1fr 1fr; } }
.wn { margin-top: 14px; }
.wn-head { font-size: 1.02rem; }
.wn-list { margin: 12px 0 0; padding-left: 1.2em; color: var(--ink-2); }
.wn-list li + li { margin-top: 6px; }
.wn-more { margin-top: 14px; }
.feedback { border: 1px solid var(--rule); border-radius: 6px; padding: 20px; background: var(--chrome); }
.feedback h3 { margin-bottom: 8px; }
.feedback p { color: var(--ink-2); }
.feedback .cta { margin-top: 16px; }

/* footer */
.site-footer { border-top: 1px solid var(--rule); background: var(--chrome); padding: 36px 0 48px; color: var(--ink-2); font-size: 0.92rem; }
.foot { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .foot { grid-template-columns: 1.5fr 1fr 1fr; } }
.foot h2 { font-size: 0.92rem; color: var(--ink); margin-bottom: 8px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.foot a { color: var(--ink); }
.foot p + p { margin-top: 8px; }
.foot-row { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }

/* release notes page */
.rn { padding-top: 40px; padding-bottom: 64px; }
.rn h1 { font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.4rem); }
.rn .lede { margin-top: 12px; color: var(--ink-2); max-width: 72ch; }
.rn-index ul { list-style: none; margin: 24px 0 8px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.rn-index a { display: inline-block; font-family: var(--mono); font-size: 0.82rem; border: 1px solid var(--rule); border-radius: 4px; padding: 2px 8px; text-decoration: none; color: var(--ink-2); }
.rn-index a:hover { border-color: var(--rule-2); color: var(--ink); }
.rn-version { border-top: 1px solid var(--rule); padding-top: 28px; margin-top: 36px; max-width: 80ch; scroll-margin-top: 64px; }
.rn-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; }
.rn-head h2 { font-size: 1.5rem; }
.rn-anchor { color: var(--ink); text-decoration: none; }
.rn-anchor:hover { text-decoration: underline; }
.rn-head time { font-family: var(--mono); font-size: 0.86rem; color: var(--ink-3); }
.rn-gh { margin-left: auto; font-size: 0.9rem; }
.rn-intro, .rn-section { margin-top: 16px; }
.rn-section h3 { font-size: 1rem; color: var(--ink-2); margin-bottom: 6px; }
.rn-version ul, .rn-version ol { margin: 6px 0; padding-left: 1.3em; }
.rn-version li { margin: 6px 0; }
.rn-version li > ul { margin-top: 4px; }
.rn-version p { margin: 8px 0; }
.rn-version blockquote { margin: 12px 0; padding: 4px 14px; border-left: 3px solid var(--rule-2); background: var(--chrome); border-radius: 0 4px 4px 0; }
.rn-version code { overflow-wrap: anywhere; }

/* manual */
.manual { padding-top: 40px; padding-bottom: 72px; }
.manual-head { max-width: 68ch; }
.manual-head h1 { font-size: clamp(1.9rem, 1.4rem + 1.8vw, 2.6rem); letter-spacing: -0.02em; }
.manual-head .lede { margin-top: 12px; color: var(--ink-2); font-size: 1.08rem; }
.manual-body { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; margin-top: 32px; }
@media (min-width: 980px) { .manual-body { grid-template-columns: 220px minmax(0, 1fr); gap: 56px; } }
.toc { font-size: 0.93rem; }
.toc details { border: 1px solid var(--rule); border-radius: 6px; padding: 12px 16px; background: var(--chrome); }
.toc summary { cursor: pointer; font-weight: 600; min-height: 28px; }
.toc ol, .toc ul { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.toc a { display: block; padding: 5px 0; color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); text-decoration: underline; }
.toc-group { margin-top: 12px; color: var(--ink-3); font-size: 0.86rem; }
.toc-steps { counter-reset: toc; }
.toc-steps li { counter-increment: toc; }
.toc-steps a::before { content: counter(toc) "  "; white-space: pre; color: var(--ink-3); font-variant-numeric: tabular-nums; }
@media (min-width: 980px) {
  .toc { position: sticky; top: 76px; align-self: start; max-height: calc(100vh - 96px); overflow-y: auto; }
  .toc details { border: 0; padding: 0; background: none; }
  .toc summary { list-style: none; pointer-events: none; }
  .toc summary::-webkit-details-marker { display: none; }
}
.doc { max-width: 760px; min-width: 0; }
.doc > section { padding: 44px 0; border-top: 1px solid var(--rule); }
.doc > section:first-child { padding-top: 8px; border-top: 0; }
.doc h2 { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.doc h3 { margin: 28px 0 8px; }
.doc p, .doc li, .doc dd { color: var(--ink-2); }
.doc p + p, .doc p + ul, .doc ul + p, .doc p + .code, .doc .code + p, .doc p + dl, .doc dl + p, .doc .table-wrap + p, .doc p + .shot, .doc .shot + p { margin-top: 12px; }
.doc ul { margin: 12px 0 0; padding-left: 1.2em; }
.doc li + li { margin-top: 8px; }
.doc strong { color: var(--ink); font-weight: 600; }
.ch { flex: none; min-width: 1.1em; color: var(--ink-3); font-weight: 500; font-variant-numeric: tabular-nums; }
kbd { display: inline-block; min-width: 1.6em; text-align: center; font-size: 0.8em; line-height: 1.5; padding: 0 0.4em; border: 1px solid var(--rule-2); border-bottom-width: 2px; border-radius: 4px; background: var(--paper); color: var(--ink); white-space: nowrap; }
.parts { display: grid; gap: 14px; margin: 16px 0 0; }
.parts > div { border-left: 3px solid var(--rule-2); padding-left: 14px; }
.parts dt, .faq dt, .clients dt { color: var(--ink); font-weight: 600; }
.parts dd, .faq dd, .clients dd { margin: 2px 0 0; }
.need { margin-top: 16px; padding: 12px 16px; background: var(--chrome); border-radius: 4px; }
/* "Your agent" tabs, drawn like the canvas side panel's tabs */
.picker { margin-top: 20px; }
.picker-tabs { display: flex; flex-wrap: wrap; gap: 0 4px; border-bottom: 1px solid var(--rule); }
.picker-tabs button { font: 500 0.92rem var(--font); color: var(--ink-2); background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; padding: 10px 10px; min-height: 44px; cursor: pointer; }
.picker-tabs button:hover { color: var(--ink); }
.picker-tabs button[aria-selected='true'] { color: var(--ink); border-bottom-color: var(--marker); }
.panel { padding-top: 4px; }
.panel + .panel { margin-top: 28px; padding-top: 24px; border-top: 1px dashed var(--rule); }
.picker.js .panel + .panel { margin-top: 0; border-top: 0; padding-top: 4px; }
.picker.js .panel > h3 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.panel > h3 { margin-top: 8px; }
.picker.js .panel > p:first-of-type { margin-top: 20px; }
.check { padding: 10px 14px; border-left: 3px solid var(--marker); background: var(--chrome); border-radius: 0 4px 4px 0; }
.doc .check { margin-top: 16px; }
.aside { font-size: 0.88rem; color: var(--ink-3) !important; }
.doc .aside { margin-top: 16px; }
.clients { display: grid; gap: 14px; margin: 14px 0 0; }
.clients .code { margin: 6px 0; }
/* the first session, as turns: the person's rule is green, the agent's violet (docs/DESIGN-SYSTEM.md) */
.session { list-style: none; margin: 20px 0 0; padding: 0; counter-reset: step; display: grid; gap: 36px; }
.session > li { counter-increment: step; position: relative; padding-left: 44px; min-width: 0; }
.session > li::before { content: counter(step); position: absolute; left: 0; top: -1px; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--ink-2); color: var(--ink-2); display: grid; place-items: center; font-size: 0.84rem; font-weight: 600; }
.session h3 { margin: 0 0 10px; }
.session > li > * + * { margin-top: 12px; }
.turn { border-left: 3px solid var(--rule-2); padding: 6px 12px; background: var(--chrome); border-radius: 0 4px 4px 0; color: var(--ink) !important; }
.turn.you { border-left-color: var(--user); }
.turn.agent { border-left-color: var(--agent); }
.who { display: block; font-size: 0.8rem; font-weight: 600; color: var(--ink-3); }
.turn.you .who { color: var(--user); }
.turn.agent .who { color: var(--agent); }
.doc .shot { margin-top: 16px; }
.doc .shot.narrow { max-width: 420px; }
.doc .receipts { margin-top: 8px; padding-left: 0; }
.doc .receipts li + li { margin-top: 0; }
.nowrap { white-space: nowrap; }
.next { list-style: none; padding: 0 !important; }
.table-wrap { overflow-x: auto; margin-top: 18px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 0.93rem; }
.doc caption { caption-side: top; text-align: left; color: var(--ink-2); padding-bottom: 8px; }
.doc th { text-align: left; font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--rule-2); padding: 8px 12px 8px 0; }
.doc td { border-bottom: 1px solid var(--rule); padding: 9px 12px 9px 0; vertical-align: top; color: var(--ink-2); }
.doc td:first-child { color: var(--ink); }
.doc td code { white-space: nowrap; }
.faq { margin: 16px 0 0; display: grid; gap: 18px; }
.more ul { columns: 1; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }
[id] { scroll-margin-top: 64px; }