/* BlockHarmony product prototype — visual system.
 * Calm and spacious: warm paper background, white surfaces, hairline borders,
 * serif headings, a restrained sage accent. State colours stay quiet on purpose. */

:root {
  --bg: #F5F3EE; --surface: #FFFFFF; --sunk: #F0EDE6;
  --ink: #20241F; --ink-2: #5C625A; --ink-3: #979B92;
  --line: rgba(32, 36, 31, .09); --line-2: rgba(32, 36, 31, .16);
  --forest: #2C4034; --sage: #5E7C66; --sage-soft: #E8EFE8;
  --violet: #766AA6; --violet-soft: #EEECF6;
  --grey: #8B8880; --grey-soft: #EEEBE5;
  --amber: #AD6233; --amber-soft: #F8ECE2;
  --serif: "New York", "Iowan Old Style", "Palatino Linotype", ui-serif, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased;
  line-height: 1.5; min-height: 100vh; display: flex; flex-direction: column; }
body.demo-on { padding-bottom: 210px; }
button, input { font: inherit; color: inherit; border: 0; background: none; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--sage); outline-offset: 3px; border-radius: 8px; }
.mono { font-family: var(--mono); font-size: 11.5px; letter-spacing: .04em; color: var(--ink-3); }
.center { text-align: center; }

/* ── Header ──────────────────────────────────────────── */
.top { position: sticky; top: 0; z-index: 20; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 18px 40px; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; font-size: 15px; }
.brand-mark { display: grid; grid-template-columns: 7px 7px; gap: 2.5px; }
.brand-mark i { width: 7px; height: 7px; border-radius: 2px; background: var(--forest); }
.brand-mark i:nth-child(2) { background: var(--sage); }
.brand-mark i:nth-child(3) { background: var(--sage); opacity: .55; }
.nav { display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); }
.nav a { padding: 7px 16px; border-radius: 999px; font-size: 14px; color: var(--ink-2); transition: background .25s, color .25s; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current] { background: var(--sunk); color: var(--ink); font-weight: 550; }
.badge { display: inline-grid; place-items: center; min-width: 17px; height: 17px; margin-left: 4px; border-radius: 9px;
  background: var(--amber); color: #fff; font-size: 11px; font-weight: 600; vertical-align: 1px; }
.badge[hidden] { display: none; }
.top-right { display: flex; justify-content: flex-end; align-items: center; gap: 12px; }
.pulse { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-3); white-space: nowrap; }
.pulse i { width: 7px; height: 7px; border-radius: 50%; background: var(--sage); animation: breathe 3.2s ease-in-out infinite; }
.pulse.amber { color: var(--amber); } .pulse.amber i { background: var(--amber); }
@keyframes breathe { 50% { opacity: .35; } }
.chip-btn { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line-2); font-size: 13px; color: var(--ink-2); transition: all .2s; }
.chip-btn:hover { color: var(--ink); border-color: var(--ink-3); }
.chip-btn[aria-pressed="true"] { background: var(--forest); border-color: var(--forest); color: #fff; }
.icon-btn { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: var(--ink-2); fill: currentColor; }
.icon-btn:hover { background: var(--sunk); color: var(--ink); }
.more { position: relative; }
.menu { position: absolute; right: 0; top: 40px; min-width: 180px; padding: 6px; border-radius: 16px; background: var(--surface);
  border: 1px solid var(--line); box-shadow: 0 14px 34px -18px rgba(32, 36, 31, .28); animation: rise .25s var(--ease); }
.menu-label { padding: 6px 12px 4px; font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.menu a { display: block; padding: 9px 12px; border-radius: 10px; font-size: 14px; color: var(--ink-2); }
.menu a:hover { background: var(--sunk); color: var(--ink); }

/* ── Page frame and type ─────────────────────────────── */
.view { width: 100%; max-width: 1040px; margin: 0 auto; padding: 56px 40px 80px; flex: 1; outline: none; animation: rise .5s var(--ease); }
.view[data-view="ask"], .view[data-view="changes"], .view[data-view="review"] { max-width: 820px; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.hero { margin-bottom: 44px; }
.hero h1 { font-family: var(--serif); font-weight: 400; font-size: 52px; line-height: 1.08; letter-spacing: -.022em; }
.lede { margin-top: 16px; max-width: 560px; font-size: 18px; color: var(--ink-2); }
.eyebrow, .label { font-family: var(--mono); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--ink-3); }
.hero .eyebrow { margin-bottom: 18px; }
.section-label { margin: 34px 4px 12px; font-size: 13px; color: var(--ink-3); }
.fine { margin-top: 28px; font-size: 12.5px; line-height: 1.6; color: var(--ink-3); }
.empty { padding: 60px 0; text-align: center; color: var(--ink-3); }

/* ── Cards and shared pieces ─────────────────────────── */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; padding: 30px 32px; border-radius: 24px;
  background: var(--surface); border: 1px solid var(--line); }
.card.attention { border-color: color-mix(in srgb, var(--amber) 34%, transparent); }
.card > .eyebrow { margin-bottom: 6px; }
.card-title { font-family: var(--serif); font-size: 23px; line-height: 1.25; letter-spacing: -.012em; }
.card-text { font-size: 15px; color: var(--ink-2); max-width: 520px; }
.card-foot { font-size: 12.5px; color: var(--ink-3); }
.card .btn, .card > .link { margin-top: auto; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 999px; background: var(--forest); color: #fff;
  font-size: 14px; font-weight: 550; transition: transform .2s var(--ease), opacity .2s; }
.btn:hover { transform: translateY(-1px); } .btn:disabled { opacity: .35; cursor: default; transform: none; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-2); }
.btn.amber { background: var(--amber); }
.link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 550; color: var(--forest); }
.link:hover { text-decoration: underline; text-underline-offset: 3px; }
.link.quiet { font-weight: 450; color: var(--ink-2); }

.status { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; color: var(--ink-2); white-space: nowrap; }
.status i { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-3); flex: none; }
.status.confirmed i { background: var(--sage); } .status.candidate i { background: var(--violet); }
.status.conflicted i { background: var(--amber); } .status.conflicted { color: var(--amber); }
.tag { display: inline-block; padding: 3px 9px; border-radius: 999px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em;
  text-transform: uppercase; white-space: nowrap; background: var(--grey-soft); color: var(--grey); }
.tag.confirmed { background: var(--sage-soft); color: var(--sage); } .tag.candidate { background: var(--violet-soft); color: var(--violet); }
.tag.conflicted { background: var(--amber-soft); color: var(--amber); } .tag.plain { background: transparent; border: 1px solid var(--line-2); color: var(--ink-2); }
.value { font-family: var(--serif); font-size: 32px; line-height: 1.15; letter-spacing: -.015em; }
.value.unknown { color: var(--ink-3); font-size: 22px; } .value.small { font-size: 22px; }
.change { font-family: var(--serif); font-size: 21px; letter-spacing: -.01em; }
.fresh { animation: glow 1.8s var(--ease); }
@keyframes glow { 0%, 35% { background: var(--sage-soft); box-shadow: 0 0 0 10px var(--sage-soft); border-radius: 10px; } }
.evidence { width: 100%; margin-top: 8px; padding: 14px 16px; border-radius: 14px; background: var(--sunk); font-size: 14.5px; animation: rise .35s var(--ease); }
.evidence cite { display: block; margin-top: 6px; font-style: normal; font-family: var(--mono); font-size: 11px; color: var(--ink-3); }

/* ── Overview ────────────────────────────────────────── */
.intro-actions { display: flex; align-items: center; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.source-card { width: 100%; display: grid; grid-template-columns: 1fr auto; gap: 4px 14px; align-items: start; padding: 14px 16px; border-radius: 14px; background: var(--sunk); margin-top: 8px; }
.source-card .who { font-size: 13.5px; font-weight: 550; } .source-card .gist { font-family: var(--serif); font-size: 17px; } .source-card .meta { font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.source-card .tag { grid-column: 2; grid-row: 1 / span 3; align-self: center; }

.workspace-label { display: inline-block; margin-left: 10px; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line-2); font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); vertical-align: 2px; }
.marker { display: inline-block; margin-right: 8px; padding: 3px 10px; border-radius: 999px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; }
.marker.same { background: var(--grey-soft); color: var(--ink-2); } .marker.review { background: var(--amber-soft); color: var(--amber); }
.live { display: inline-flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--sage); }
.live i { width: 7px; height: 7px; border-radius: 50%; background: var(--sage); animation: breathe 2s ease-in-out infinite; }
.thinking { padding: 34px 36px; border-radius: 24px; background: var(--surface); border: 1px solid var(--line); color: var(--ink-2); font-size: 16px; }
.answer .error { color: var(--amber); }

.facts { width: 100%; }
.fact { display: flex; justify-content: space-between; align-items: flex-end; padding: 16px 0; border-top: 1px solid var(--line); }
.fact:first-child { border-top: 0; padding-top: 0; }
.changes { width: 100%; display: grid; gap: 16px; margin: 6px 0 4px; }
.changes li { display: grid; grid-template-columns: 76px 1fr auto; align-items: baseline; gap: 12px; }

/* ── Ask ─────────────────────────────────────────────── */
.hero.center { margin: 28px 0 32px; }
.askbar { display: flex; align-items: center; gap: 10px; padding: 10px 10px 10px 28px; border-radius: 999px; background: var(--surface);
  border: 1px solid var(--line-2); transition: border-color .2s, box-shadow .2s; }
.askbar:focus-within { border-color: var(--sage); box-shadow: 0 0 0 4px var(--sage-soft); }
.askbar input { flex: 1; font-size: 19px; outline: none; min-width: 0; } .askbar input::placeholder { color: var(--ink-3); }
.send { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--forest); color: #fff; }
.suggest { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 22px 0 40px; }
.suggest button { padding: 8px 15px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font-size: 13.5px; color: var(--ink-2); transition: all .2s; }
.suggest button:hover { color: var(--ink); border-color: var(--line-2); }
.answer { padding: 34px 36px; border-radius: 24px; background: var(--surface); border: 1px solid var(--line); animation: rise .5s var(--ease); }
.asked { font-size: 14px; color: var(--ink-3); margin-bottom: 22px; }
.tiles { display: flex; flex-wrap: wrap; gap: 14px 44px; margin: 14px 0 24px; }
.tile .value { font-size: 40px; margin-bottom: 4px; } .tile .value.unknown { font-size: 24px; line-height: 46px; } .tile .value.conflicted { font-size: 30px; line-height: 46px; }
.prose { font-size: 18px; line-height: 1.6; max-width: 640px; }
.answer-foot { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line); }
.why { margin-top: 22px; display: grid; gap: 14px; justify-items: start; animation: rise .4s var(--ease); }
.why-row { width: 100%; padding: 20px 22px; border-radius: 18px; border: 1px solid var(--line); display: grid; gap: 8px; }
.why-head { display: flex; align-items: center; gap: 14px; margin-bottom: 4px; } .why-head .label { width: 76px; }
.why-value { font-family: var(--serif); font-size: 22px; margin-right: auto; }
.previous { font-size: 15px; color: var(--ink-2); display: flex; align-items: center; gap: 10px; } .previous span { font-size: 13px; color: var(--ink-3); }
.context { width: 100%; padding: 18px 20px; border-radius: 14px; background: #262B26; color: #DDE3DA; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; overflow: auto; }
.why .fine { margin-top: 0; }

/* ── Changes ─────────────────────────────────────────── */
.segment { display: inline-flex; padding: 4px; border-radius: 999px; background: var(--sunk); margin-bottom: 30px; }
.segment button { padding: 6px 16px; border-radius: 999px; font-size: 13.5px; color: var(--ink-2); }
.segment button[aria-pressed="true"] { background: var(--surface); color: var(--ink); font-weight: 550; box-shadow: 0 1px 2px rgba(32, 36, 31, .08); }
.day { display: grid; grid-template-columns: 84px 1fr; position: relative; }
.day::before { content: ""; position: absolute; left: 62px; top: 8px; bottom: -8px; width: 1px; background: var(--line-2); }
.day:last-child::before { bottom: 30px; }
.date { padding-top: 26px; position: relative; }
.date::after { content: ""; position: absolute; left: 58px; top: 29px; width: 9px; height: 9px; border-radius: 50%; background: var(--bg); border: 1.5px solid var(--sage); }
.day ul { display: grid; gap: 12px; padding-bottom: 22px; }
.entry { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 22px 26px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); }
.entry-main { display: grid; gap: 6px; justify-items: start; flex: 1; min-width: 0; }
.entry .change { font-size: 24px; }

/* ── Review ──────────────────────────────────────────── */
.review { gap: 16px; }
.review-head { width: 100%; display: flex; justify-content: space-between; align-items: center; }
.sides { display: flex; align-items: center; gap: 28px; margin: 4px 0; }
.side { transition: opacity .3s; } .side.lost { opacity: .4; } .side.lost .value { text-decoration: line-through; text-decoration-thickness: 1px; }
.vs-mark { font-size: 20px; color: var(--ink-3); padding-top: 14px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 6px; } .actions .link { margin-left: 8px; }
.note { padding: 10px 14px; border-radius: 12px; background: var(--amber-soft); color: var(--amber); font-size: 14px; }
.inspect { width: 100%; display: grid; gap: 4px; }
.principle { color: var(--ink-2); letter-spacing: .12em; }
.empty-card { align-items: center; text-align: center; padding: 64px 32px; }

/* ── Sources, How it works, Architecture ─────────────── */
.sources { border-radius: 24px; background: var(--surface); border: 1px solid var(--line); padding: 8px 32px; }
.source { display: grid; grid-template-columns: 44px 1.4fr 1fr 1fr 1fr; align-items: center; gap: 16px; padding: 20px 0; border-top: 1px solid var(--line); }
.source:first-child { border-top: 0; }
.avatar { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--sunk); font-family: var(--serif); font-size: 18px; color: var(--forest); }
.source-name { font-size: 16px; font-weight: 550; } .source-meta { text-align: right; }
.steps { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 36px; }
.steps li, .node { display: grid; gap: 8px; align-content: start; padding: 26px 28px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); }
.pipeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.node.core { border-color: color-mix(in srgb, var(--sage) 45%, transparent); background: color-mix(in srgb, var(--sage-soft) 55%, var(--surface)); }

/* ── Demo bar ────────────────────────────────────────── */
.demo { position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 30; width: min(920px, calc(100% - 48px)); padding: 16px 22px 20px;
  border-radius: 24px; background: var(--surface); border: 1px solid var(--line-2); box-shadow: 0 24px 60px -28px rgba(32, 36, 31, .4); }
.demo[hidden] { display: none; }
.demo-top { display: flex; align-items: center; gap: 18px; margin-bottom: 12px; } .demo-top .link { margin-left: auto; font-size: 13px; }
.pips { display: flex; gap: 5px; } .pips i { width: 18px; height: 3px; border-radius: 2px; background: var(--line-2); transition: background .4s; } .pips i.on { background: var(--sage); }
.demo-body { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; }
.incoming { display: grid; gap: 4px; min-width: 0; animation: rise .5s var(--ease); }
.incoming-text { font-family: var(--serif); font-size: 19px; line-height: 1.35; }
.incoming-effect { font-size: 14px; color: var(--sage); font-weight: 500; }
.demo-actions { display: flex; gap: 10px; flex: none; }

/* ── Comparison dialog, toast, footer ────────────────── */
.sheet { margin: auto; width: min(760px, calc(100% - 40px)); padding: 40px 44px; border: 0; border-radius: 28px; background: var(--surface); color: var(--ink); }
.sheet::backdrop { background: rgba(32, 36, 31, .32); backdrop-filter: blur(4px); }
.sheet[open] { animation: rise .4s var(--ease); }
.sheet h2 { font-family: var(--serif); font-weight: 400; font-size: 30px; line-height: 1.2; letter-spacing: -.015em; margin: 12px 0 28px; max-width: 520px; }
.sheet .close { position: absolute; top: 18px; right: 18px; }
.versus { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.vs { padding: 26px 28px; border-radius: 20px; border: 1px solid var(--line); }
.vs.bh { background: color-mix(in srgb, var(--sage-soft) 60%, var(--surface)); border-color: color-mix(in srgb, var(--sage) 35%, transparent); }
.vs .big { font-family: var(--serif); font-size: 46px; line-height: 1.1; margin-top: 14px; letter-spacing: -.02em; } .vs .big.second { font-size: 30px; }
.vs.raw .big { color: var(--ink-2); } .vs .unit { font-size: 13px; color: var(--ink-3); }
.vs ul { margin-top: 18px; display: grid; gap: 6px; font-size: 14px; color: var(--ink-2); }
.toast { position: fixed; left: 50%; top: 84px; transform: translate(-50%, -12px); z-index: 40; padding: 10px 18px; border-radius: 999px; background: var(--ink); color: #fff;
  font-size: 13.5px; opacity: 0; pointer-events: none; transition: all .35s var(--ease); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.foot { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 22px 40px 28px; font-family: var(--serif); font-size: 15px; color: var(--ink-2); }

@media (max-width: 860px) {
  .top { grid-template-columns: 1fr auto; row-gap: 12px; padding: 14px 20px; } .nav { grid-row: 2; grid-column: 1 / -1; justify-self: start; overflow-x: auto; max-width: 100%; }
  .pulse { display: none; } .view { padding: 32px 20px 60px; } .hero h1 { font-size: 38px; } .tiles { gap: 14px 28px; }
  .grid, .steps, .pipeline, .versus { grid-template-columns: 1fr; } .found { grid-template-columns: 1fr 1fr; } .source { grid-template-columns: 44px 1fr auto; } .source-meta { display: none; }
  .demo-body { flex-direction: column; align-items: stretch; } .foot { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }