/* kosnote.com — shared by / and /about/. Tokens from design-handoff/. */
:root {
  --bg: #F5F2EA;
  --raised: #FBFAF6;
  --line: #D6CFBF;
  --line-2: #DDD7C8;
  --line-3: #CFC8B6;
  --ink: #17181D;
  --body: #4A4B55;
  --muted: #5C5D66;
  --text-2: #3E3F48;
  --accent: #2F3FB8;
  --accent-hover: #1F2A85;
  --band: #16171C;
  --band-text: #F5F2EA;
  --band-body: #C9C6BD;
  --band-muted: #A6A399;
  --band-line: #34353D;
  --accent-on-dark: #A9B3FF;
  --red: #B8321F;
  --green: #25583A;
  --green-bg: #E3EEE6;
  --serif: "Newsreader", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --gutter: 24px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.5; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
[id] { scroll-margin-top: 88px; }

.wrap { width: 100%; max-width: calc(1200px + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; margin: 0; }
.serif { font-family: var(--serif); font-weight: 400; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; }
h1 em, h2 em { color: var(--accent); }
/* Desktop / phone variants of the same element. !important because the
   component rules (.hero .ctas {display:flex}) are more specific. */
@media (min-width: 641px) { .m-only { display: none !important; } }
@media (max-width: 640px) { .d-only { display: none !important; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 54px; padding: 0 24px; border-radius: 10px;
  font: 600 16px/1.2 var(--sans); text-decoration: none; white-space: nowrap;
  transition: background .15s, color .15s, border-color .15s;
}
.btn svg { flex-shrink: 0; }
.btn-primary { background: var(--ink); color: #fff; border: 1px solid var(--ink); }
.btn-primary:hover { background: #2B2C33; color: #fff; }
.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--ink); font-weight: 500; }
.btn-secondary:hover { background: var(--ink); color: #fff; }
.btn-sm { min-height: 44px; padding: 0 16px; border-radius: 8px; font-size: 15px; font-weight: 500; }
.band .btn-primary { background: var(--band-text); color: var(--ink); border-color: var(--band-text); }
.band .btn-primary:hover { background: #fff; color: var(--ink); }
.band .btn-secondary { color: var(--band-text); border-color: var(--band-text); }
.band .btn-secondary:hover { background: var(--band-text); color: var(--ink); }

/* ---------- header ---------- */
.site-head { position: sticky; top: 0; z-index: 20; background: rgba(245, 242, 234, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line-2); }
.site-head .wrap { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; min-height: 44px; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.brand img { width: 32px; height: 32px; border-radius: 7px; object-fit: cover; }
.brand span { font-family: var(--serif); font-size: 25px; font-weight: 500; letter-spacing: -.01em; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 15px; }
.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav .nav-link { display: inline-flex; align-items: center; min-height: 44px; }
.site-nav .nav-link:hover { color: var(--accent); }
.site-nav .nav-link[aria-current="page"] { font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); min-height: 30px; }
.site-nav .btn-sm { min-height: 40px; }
.site-nav .btn-sm.btn-primary { color: #fff; }
.menu-btn { display: none; width: 44px; height: 44px; border: 0; background: transparent; border-radius: 8px; cursor: pointer; align-items: center; justify-content: center; color: var(--ink); }
.menu-btn:hover { background: rgba(23, 24, 29, .06); }

/* ---------- landing: hero ---------- */
.hero { padding: 84px 0 0; text-align: center; }
.hero .wrap { display: flex; flex-direction: column; align-items: center; gap: 22px; }
.hero h1 { max-width: 1120px; font-size: clamp(42px, 6.2vw, 84px); line-height: 1.02; letter-spacing: -.025em; }
.hero .lede { margin: 0; max-width: 660px; font-size: 20px; line-height: 1.5; color: var(--body); }
.hero .ctas { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 6px; }
.hero .fine { font-size: 14px; color: var(--muted); margin: 0; }
.hero .fine a { color: var(--muted); }

/* ---------- landing: product screenshot ---------- */
.product { padding: 56px 0 0; }
.shot { position: relative; margin: 0; border: 1px solid var(--line-3); border-radius: 12px; overflow: hidden; background: var(--raised);
  box-shadow: 0 48px 90px -44px rgba(23, 24, 29, .40), 0 2px 6px rgba(23, 24, 29, .08); }
.shot img { width: 100%; }
.callout {
  position: absolute; transform: translate(-50%, -50%);
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600;
  box-shadow: 0 0 0 3px #fff, 0 4px 12px rgba(23, 24, 29, .3);
}
.num { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 13px; font-weight: 600; display: flex; align-items: center; justify-content: center; }
.captions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-top: 32px; }
.captions > div { display: flex; gap: 14px; }
.captions h3, .strip h3 { font-family: var(--sans); font-size: 17px; font-weight: 600; line-height: 1.35; }
.captions p, .strip p { margin: 4px 0 0; font-size: 15px; line-height: 1.5; color: var(--body); }

/* ---------- landing: four-up strip ---------- */
.strip { padding: 80px 0; }
.strip .grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.strip .grid4 > div { border-top: 2px solid var(--ink); padding-top: 16px; }

/* ---------- landing: what it does ---------- */
.features { padding: 40px 0 120px; }
.features .wrap { display: flex; flex-direction: column; gap: 96px; }
.features .intro { display: flex; flex-direction: column; gap: 14px; max-width: 900px; }
.features h2 { font-size: clamp(36px, 4.4vw, 54px); line-height: 1.08; letter-spacing: -.02em; }
.features h2 em { color: inherit; }
.row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 80px; align-items: center; }
.row .copy { display: flex; flex-direction: column; gap: 16px; }
.row .tag { font-family: var(--mono); font-size: 13px; color: var(--accent); margin: 0; }
.row h3 { font-size: clamp(30px, 3.2vw, 40px); line-height: 1.12; }
.row p { margin: 0; font-size: 18px; line-height: 1.6; color: var(--body); }
.card { min-height: 400px; padding: 24px; border: 1px solid var(--line-3); border-radius: 12px; background: var(--raised);
  box-shadow: 0 30px 60px -40px rgba(23, 24, 29, .35); display: flex; flex-direction: column; gap: 12px; }
.card-title { display: flex; justify-content: space-between; align-items: center; font-size: 14px; font-weight: 600; }
.badge { font-size: 12px; font-weight: 600; color: #fff; background: var(--red); border-radius: 9px; padding: 1px 8px; }
.nudge { padding: 14px 16px; border-radius: 9px; background: #fff; border: 1px solid #DCD5C5; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.nudge .what { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.nudge .kind { font-size: 12px; font-weight: 600; }
.nudge .title { font-size: 15px; font-weight: 500; }
.nudge .where { font-size: 13px; color: var(--muted); }
.nudge .acts { display: flex; gap: 6px; font-size: 13px; flex-shrink: 0; }
.nudge .acts span { padding: 6px 12px; border-radius: 6px; border: 1px solid var(--line-3); }
.nudge .acts span:first-child { background: var(--ink); color: #fff; border-color: var(--ink); }
.search-art { min-height: 400px; border-radius: 12px; background: #2A2B31; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; padding: 24px; }
.search-art .bg { position: absolute; inset: 0; padding: 20px; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); grid-auto-rows: 14px; gap: 8px; opacity: .35; }
.search-art .bg i { background: #4A4B55; border-radius: 2px; }
.search-art .bg i:nth-child(-n+6) { background: #6B6C75; }
.palette { position: relative; width: 100%; max-width: 460px; border-radius: 12px; background: var(--raised); box-shadow: 0 24px 60px rgba(0, 0, 0, .45); overflow: hidden; }
.palette .q { height: 54px; padding: 0 16px; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid #DCD5C5; font-size: 17px; }
.palette .q span { flex-grow: 1; }
.caret { display: inline-block; width: 2px; height: 18px; background: var(--ink); vertical-align: -3px; }
.kbd { font-family: var(--mono); font-size: 11px; padding: 2px 6px; border: 1px solid var(--line); border-radius: 4px; color: var(--body); }
.palette .res { padding: 8px; display: flex; flex-direction: column; gap: 2px; font-size: 14px; }
.palette .grp { padding: 6px 10px; font-size: 11px; font-weight: 600; letter-spacing: .1em; color: var(--muted); }
.palette .hit { padding: 9px 10px; border-radius: 7px; display: flex; justify-content: space-between; gap: 12px; }
.palette .hit.on { background: #E1E3F5; flex-direction: column; gap: 2px; }
.palette .hit.on small { font-size: 13px; color: var(--body); }
.palette .hit em { font-style: normal; font-family: var(--mono); font-size: 12px; color: var(--muted); white-space: nowrap; }
.provider { padding: 12px 14px; border-radius: 9px; border: 1px solid #DCD5C5; background: #fff; display: flex; align-items: center; gap: 12px; font-size: 15px; }
.provider .radio { width: 16px; height: 16px; flex-shrink: 0; border-radius: 50%; border: 1.5px solid #8A8A92; }
.provider .name { flex-grow: 1; }
.provider .note { font-size: 12px; color: var(--muted); }
.provider.on { border: 2px solid var(--accent); }
.provider.on .radio { border: 5px solid var(--accent); }
.provider.on .name { font-weight: 500; }
.provider .local { font-size: 12px; font-weight: 500; padding: 2px 8px; border-radius: 10px; background: var(--green-bg); color: var(--green); }
.card .foot { margin-top: auto; font-size: 13px; color: var(--muted); }
.graph-card { gap: 8px; padding: 20px 24px; }
.graph-card svg { width: 100%; height: auto; margin: auto 0; }
.steps { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 400; color: var(--body); }
.steps .seg { display: flex; padding: 2px; border-radius: 6px; background: #E9E4D8; }
.steps .seg span { padding: 2px 8px; border-radius: 4px; }
.steps .seg .on { background: #fff; font-weight: 600; }

/* ---------- dark band + footer ---------- */
.band { background: var(--band); color: var(--band-text); }
.band h2 em { color: var(--accent-on-dark); }
.download { padding: 104px 0 48px; }
.download .wrap { display: flex; flex-direction: column; gap: 72px; }
.download .cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 80px; align-items: center; }
.download .get { display: flex; flex-direction: column; gap: 22px; }
.download h2 { font-size: clamp(48px, 5.4vw, 72px); line-height: 1.02; letter-spacing: -.02em; }
.band .lede { margin: 0; font-size: 18px; line-height: 1.55; color: var(--band-body); }
.download .ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.file { font-family: var(--mono); font-size: 13px; color: var(--band-muted); margin: 0; }
.warn { margin: 0; max-width: 520px; font-size: 14px; line-height: 1.55; color: var(--band-body); border: 1px solid var(--band-line); border-radius: 8px; padding: 12px 14px; }
.warn b { color: var(--band-text); font-weight: 600; }
.name-block { display: flex; gap: 28px; align-items: center; }
.name-block figure { margin: 0; width: 260px; flex-shrink: 0; display: flex; flex-direction: column; gap: 10px; }
.name-block figure img { width: 260px; height: 250px; object-fit: cover; border-radius: 6px; }
.name-block figcaption { font-size: 13px; font-style: italic; color: var(--band-muted); }
.name-block .text { display: flex; flex-direction: column; gap: 14px; }
.name-block .eyebrow { color: var(--band-muted); letter-spacing: .08em; }
.name-block .big { font-family: var(--serif); font-size: 30px; line-height: 1.2; margin: 0; }
.name-block p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--band-body); }
.site-foot { padding-top: 28px; border-top: 1px solid var(--band-line); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 28px; font-size: 14px; color: var(--band-muted); }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 0 28px; }
.site-foot a { color: #D6D3CA; text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.site-foot a:hover { color: #fff; text-decoration: underline; }

/* ---------- about ---------- */
.about-hero { padding: 104px 0 88px; }
.about-hero .copy { display: flex; flex-direction: column; gap: 24px; }
.about-hero h1 { font-size: clamp(44px, 5.4vw, 72px); line-height: 1.04; letter-spacing: -.025em; }
.about-hero .lede { margin: 0; max-width: 680px; font-size: 20px; line-height: 1.6; color: var(--body); }
.split { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 32px; }
.split > .label { grid-column: 1 / span 3; }
.why { padding: 0 0 104px; }
.why .label { padding-top: 10px; }
.why .prose { grid-column: 4 / span 7; display: flex; flex-direction: column; gap: 22px; font-family: var(--serif); font-size: 23px; line-height: 1.6; color: #2B2C33; }
.why .prose p { margin: 0; }
.four { padding: 0 0 104px; }
.four .grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-3); border-bottom: 1px solid var(--line-3); }
.four .grid4 > div { padding: 32px 28px; display: flex; flex-direction: column; gap: 10px; border-right: 1px solid var(--line-2); }
.four .grid4 > div:first-child { padding-left: 0; }
.four .grid4 > div:last-child { padding-right: 0; border-right: 0; }
.four .k { font-family: var(--mono); font-size: 13px; color: var(--accent); margin: 0; }
.four p { margin: 0; font-size: 16px; line-height: 1.55; color: var(--text-2); }
.install { padding: 0 0 104px; }
.install .wrap { display: flex; flex-direction: column; gap: 40px; }
.install .head { display: flex; flex-direction: column; gap: 14px; }
.install h2 { font-size: clamp(36px, 4.4vw, 54px); line-height: 1.08; letter-spacing: -.02em; }
.install h2 em { color: inherit; }
.boxes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.box { padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: var(--raised); display: flex; flex-direction: column; gap: 12px; }
.box h3 { display: flex; gap: 12px; align-items: center; font-family: var(--sans); font-size: 20px; font-weight: 600; }
.box h3 svg { flex-shrink: 0; }
.box p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--body); }
.box .sum { font-family: var(--mono); font-size: 13px; color: var(--muted); overflow-wrap: anywhere; }
.box ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 16px; line-height: 1.5; color: var(--text-2); }
.box li { display: flex; gap: 10px; }
.box li::before { content: "—"; color: var(--green); font-weight: 600; }
.changelog { padding: 0 0 104px; }
.changelog .label { display: flex; flex-direction: column; gap: 10px; }
.changelog .label p { margin: 0; font-size: 15px; line-height: 1.5; color: var(--muted); }
.releases { grid-column: 4 / span 9; border-top: 1px solid var(--line-3); }
.release { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 32px; padding: 22px 0; border-bottom: 1px solid var(--line-2); }
.release .v { display: flex; flex-direction: column; gap: 4px; }
.release .v b { font-family: var(--mono); font-size: 15px; font-weight: 500; }
.release .v span { font-size: 13px; color: var(--muted); }
.release p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--text-2); }
.contact { padding: 96px 0 48px; }
.contact .wrap { display: flex; flex-direction: column; gap: 64px; }
.contact .cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 80px; align-items: end; }
.contact h2 { font-size: clamp(40px, 4.6vw, 56px); line-height: 1.05; letter-spacing: -.02em; }
.contact .say { display: flex; flex-direction: column; gap: 18px; }
.contact .reach { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.contact .reach .back { font-size: 16px; color: #D6D3CA; display: inline-flex; align-items: center; min-height: 44px; }
.contact .reach .back:hover { color: #fff; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .name-block { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 900px) {
  .site-nav { display: none; position: absolute; top: 76px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: var(--bg); border-bottom: 1px solid var(--line-2); box-shadow: 0 16px 30px -20px rgba(23, 24, 29, .35); }
  .site-head.open .site-nav { display: flex; }
  .site-nav .nav-link { min-height: 48px; border-bottom: 1px solid var(--line-2); font-size: 16px; }
  .site-nav .nav-link[aria-current="page"] { min-height: 48px; box-shadow: none; color: var(--accent); }
  .site-nav .btn-sm { margin-top: 12px; min-height: 48px; }
  .menu-btn { display: inline-flex; }

  .captions { grid-template-columns: 1fr; gap: 20px; }
  .strip .grid4, .four .grid4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .four .grid4 > div, .four .grid4 > div:first-child, .four .grid4 > div:last-child { padding: 24px 20px 24px 0; border-right: 0; border-bottom: 1px solid var(--line-2); }
  .four .grid4 > div:nth-child(odd) { border-right: 1px solid var(--line-2); }
  .four .grid4 > div:nth-child(even) { padding-left: 20px; }
  .four .grid4 > div:nth-last-child(-n+2) { border-bottom: 0; }
  .features .wrap { gap: 72px; }
  .row { grid-template-columns: 1fr; gap: 32px; }
  .row .copy { order: 1; }
  .row .card, .row .search-art { order: 2; min-height: 0; }
  .download .cols, .contact .cols { grid-template-columns: 1fr; gap: 48px; }
  .download { padding-top: 80px; }
  .about-hero { padding: 72px 0 64px; }
  .split { display: flex; flex-direction: column; gap: 16px; }
  .why .prose { font-size: 20px; }
  .boxes { grid-template-columns: 1fr; }
  .release { grid-template-columns: 110px minmax(0, 1fr); gap: 20px; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  .site-head .wrap { height: 60px; }
  .site-nav { top: 60px; }
  .brand img { width: 28px; height: 28px; }
  .brand span { font-size: 22px; }
  .hero { padding-top: 28px; text-align: left; }
  .hero .wrap { align-items: stretch; gap: 14px; }
  .hero .eyebrow { font-size: 11px; }
  .hero h1 { font-size: 42px; line-height: 1.04; letter-spacing: -.02em; }
  .hero .lede { font-size: 16px; }
  .hero .ctas { flex-direction: column; gap: 12px; }
  .hero .ctas .btn { width: 100%; min-height: 52px; white-space: normal; text-align: center; }
  .hero .fine { font-size: 13px; text-align: center; }
  .product { padding-top: 24px; }
  .callout { width: 22px; height: 22px; font-size: 12px; box-shadow: 0 0 0 2px #fff, 0 2px 8px rgba(23, 24, 29, .3); }
  .strip { padding: 56px 0; }
  .strip .grid4, .four .grid4 { grid-template-columns: 1fr; }
  .four .grid4 > div, .four .grid4 > div:nth-child(odd), .four .grid4 > div:nth-child(even) { padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line-2); }
  .four .grid4 > div:last-child { border-bottom: 0; }
  .features { padding-bottom: 80px; }
  .row p { font-size: 17px; }
  .card, .graph-card { padding: 16px; }
  .nudge { flex-direction: column; align-items: stretch; }
  .nudge .acts { align-self: flex-start; }
  .search-art { padding: 16px; }
  .palette .hit { flex-direction: column; gap: 2px; }
  .download .ctas .btn, .contact .reach .btn { width: 100%; white-space: normal; }
  .name-block figure, .name-block figure img { width: 100%; }
  .name-block figure img { height: auto; aspect-ratio: 260 / 250; }
  .site-foot { flex-direction: column; align-items: flex-start; }
  .about-hero { padding: 48px 0 48px; }
  .why .prose { font-size: 19px; }
  .box { padding: 20px; }
  .release { grid-template-columns: 1fr; gap: 8px; }
  .contact { padding-top: 72px; }
}