:root {
  --bg: #f6f5ef;
  --panel: #ffffff;
  --panel-2: #efede4;
  --ink: #15171b;
  --muted: #5f636b;
  --line: #e2dfd3;
  --accent: #1e9e4a;
  --accent-ink: #0f6d31;
  --away: #d99a06;
  --busy: #d9493a;
  --off: #a3a7ad;
  --code-bg: #15171b;
  --code-ink: #e9e7df;
  --radius: 12px;
  --shadow: 0 1px 0 rgba(20, 22, 26, .04), 0 12px 32px -12px rgba(20, 22, 26, .18);
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1113;
    --panel: #171a1d;
    --panel-2: #1d2024;
    --ink: #ecebe5;
    --muted: #9a9ea6;
    --line: #2a2e33;
    --accent: #34c065;
    --accent-ink: #6fdc95;
    --code-bg: #0a0b0c;
    --shadow: 0 12px 32px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent-ink); text-underline-offset: 3px; }
code { font-family: var(--mono); font-size: .9em; background: var(--panel-2); padding: .1em .35em; border-radius: 5px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 650; }
h3 { font-size: 1.1rem; font-weight: 600; }
p { margin: 0 0 1em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.logo-mark { display: inline-grid; grid-template-columns: repeat(3, 7px); gap: 3px; padding: 6px 7px; background: var(--ink); border-radius: 8px; vertical-align: middle; }
.logo-mark i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.logo-mark i:nth-child(2) { background: var(--away); }
.logo-mark i:nth-child(3) { background: var(--busy); }
.logo-mark.small { padding: 4px 5px; grid-template-columns: repeat(3, 5px); gap: 2px; border-radius: 6px; }
.logo-mark.small i { width: 5px; height: 5px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: .95rem; }
.nav-links a { color: var(--ink); text-decoration: none; }
.nav-links a:hover { color: var(--accent-ink); }
.nav-links a.btn, .nav-links a.btn:hover { color: var(--bg); }
.nav-links a.btn:hover { color: #fff; }
.nav-links .link { text-decoration: none; color: var(--ink); }
.nav-links form { margin: 0; }
@media (max-width: 760px) {
  .nav-links a:not(.btn) { display: none; }
  .nav-links a[href="/dashboard"] { display: inline; }
}

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 10px; border: 1px solid var(--ink); background: var(--ink); color: var(--bg); font: 600 1rem var(--sans); text-decoration: none; cursor: pointer; transition: transform .12s ease, background .12s ease; }
.btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--panel-2); color: var(--ink); border-color: var(--ink); }
.btn-small { padding: 7px 13px; font-size: .9rem; border-radius: 8px; }
.link { background: none; border: 0; padding: 0; font: inherit; color: var(--muted); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.link:hover { color: var(--ink); }
.link.danger:hover { color: var(--busy); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* presence dots */
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--off); flex: none; }
.dot.online { background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.dot.away { background: var(--away); }
.dot.busy { background: var(--busy); }

/* hero */
.hero { padding: 72px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font: 500 .85rem var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 18px; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 12px; }
.fine { font-size: .875rem; color: var(--muted); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero { padding-top: 40px; } }

/* demo window */
.window { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; font-size: .9rem; }
.window-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.window-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.window-bar b { margin-left: 10px; font: 500 .8rem var(--mono); color: var(--muted); }
.window-body { display: grid; grid-template-columns: 170px 1fr; min-height: 380px; }
.buddies { border-right: 1px solid var(--line); padding: 12px 10px; background: color-mix(in srgb, var(--panel-2) 45%, var(--panel)); }
.buddy-head { font: 600 .7rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 4px 8px; }
.buddy { display: grid; grid-template-columns: 9px 1fr; column-gap: 8px; align-items: center; padding: 6px 4px; font: 500 .8rem var(--mono); word-break: break-all; }
.buddy small { grid-column: 2; font: 400 .72rem var(--sans); color: var(--muted); }
.chat { padding: 14px 16px; display: flex; flex-direction: column; gap: 10px; }
.msg { opacity: 0; transform: translateY(6px); animation: pop .4s ease forwards; }
.msg p { margin: 2px 0 0; }
.msg code { font-size: .82em; }
.who { font: 600 .78rem var(--mono); }
.who.a { color: var(--accent-ink); }
.who.b { color: #7a5ad8; }
@media (prefers-color-scheme: dark) { .who.b { color: #a891f0; } }
.msg.sys { display: flex; align-items: center; gap: 8px; font-size: .78rem; color: var(--muted); }
.typing { display: flex; align-items: center; gap: 4px; font-size: .78rem; color: var(--muted); opacity: 0; animation: pop .4s ease forwards; }
.typing i { width: 5px; height: 5px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; margin-right: 6px; }
.m1 { animation-delay: .3s; } .m2 { animation-delay: 1.3s; } .m3 { animation-delay: 2.1s; } .m4 { animation-delay: 3.2s; }
.m5 { animation-delay: 4.4s; } .m6 { animation-delay: 5.5s; } .m7 { animation-delay: 6.6s; }
@keyframes pop { to { opacity: 1; transform: none; } }
@keyframes blink { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .msg, .typing { animation: none; opacity: 1; transform: none; } .typing i { animation: none; } }
@media (max-width: 560px) { .window-body { grid-template-columns: 1fr; } .buddies { display: none; } }

/* sections */
.band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--panel); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; padding: 44px 16px; }
.steps p { color: var(--muted); margin: 0; }
.num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--ink); color: var(--bg); font: 600 .85rem var(--mono); margin-bottom: 14px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; gap: 28px; } }
.section { padding: 88px 0; }
.section.alt { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.two { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.two > div:first-child p { color: var(--muted); }
@media (max-width: 900px) { .two { grid-template-columns: 1fr; } }

/* tabs + code */
.tabs { min-width: 0; }
.tab-list { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 10px; }
.tab { border: 1px solid var(--line); background: transparent; color: var(--muted); padding: 7px 12px; border-radius: 8px; font: 500 .88rem var(--sans); cursor: pointer; }
.tab.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.tab-panel { display: none; }
.tab-panel.on { display: block; }
.hint { font-size: .9rem; color: var(--muted); margin-bottom: 8px; }
.code { position: relative; background: var(--code-bg); color: var(--code-ink); border-radius: var(--radius); }
.code pre { margin: 0; padding: 44px 20px 18px; overflow-x: auto; font: 400 .86rem/1.65 var(--mono); }
.code code { background: none; padding: 0; color: inherit; font-size: inherit; }
pre.code { padding: 18px 20px; overflow-x: auto; font: 400 .82rem/1.65 var(--mono); }
.copy { position: absolute; top: 10px; right: 10px; background: rgba(255,255,255,.08); color: var(--code-ink); border: 1px solid rgba(255,255,255,.14); border-radius: 7px; padding: 4px 10px; font: 500 .78rem var(--sans); cursor: pointer; }
.copy:hover { background: rgba(255,255,255,.16); }
.code.key pre { font-size: 1rem; padding-right: 80px; word-break: break-all; white-space: pre-wrap; }

/* tools */
.tools { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 28px; }
.tools > div { background: var(--panel); padding: 20px; }
.tools code { background: none; padding: 0; font-weight: 600; font-size: .85rem; }
.tools p { color: var(--muted); font-size: .9rem; margin: 6px 0 0; }
@media (max-width: 900px) { .tools { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .tools { grid-template-columns: 1fr; } }

/* pricing */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 360px)); gap: 20px; margin-top: 28px; }
.plan { border: 1px solid var(--line); border-radius: 16px; padding: 28px; background: var(--panel); display: flex; flex-direction: column; }
.plan.pro { border-color: var(--ink); box-shadow: var(--shadow); }
.price { font-size: 2.6rem; font-weight: 700; letter-spacing: -.03em; margin: 0 0 12px; }
.price small { font-size: 1rem; color: var(--muted); font-weight: 500; }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; flex: 1; }
.plan li { padding: 6px 0 6px 26px; position: relative; }
.plan li::before { content: ''; position: absolute; left: 4px; top: 15px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
@media (max-width: 640px) { .plans { grid-template-columns: 1fr; } }

/* faq */
.faq details { max-width: 820px; }
details { border-bottom: 1px solid var(--line); padding: 18px 0; }
summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::after { content: '+'; font: 400 1.3rem var(--mono); color: var(--muted); line-height: 1; }
details[open] summary::after { content: '−'; }
details p { color: var(--muted); margin: 12px 0 0; }
.final { padding: 96px 0; }
.final h2 { margin-bottom: 24px; }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 28px 0; font-size: .88rem; color: var(--muted); }
.foot-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.foot-links { display: flex; gap: 18px; }
.foot a { color: var(--muted); }

/* auth */
.auth { display: grid; place-items: start center; padding: 64px 16px 96px; }
.card { width: 100%; max-width: 440px; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 32px; box-shadow: var(--shadow); }
.card h1 { font-size: 1.8rem; }
.form { display: grid; gap: 16px; margin: 20px 0; }
.form label { display: grid; gap: 6px; font-weight: 500; font-size: .92rem; }
.field-hint { font-weight: 400; color: var(--muted); font-size: .82rem; }
input, select { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; min-width: 0; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.form label.check { display: flex; align-items: center; gap: 10px; font-weight: 400; }
.check input { width: 18px; height: 18px; }
.or { text-align: center; color: var(--muted); font-size: .85rem; margin: 0; }
.error { background: color-mix(in srgb, var(--busy) 12%, var(--panel)); border: 1px solid color-mix(in srgb, var(--busy) 40%, transparent); color: var(--ink); padding: 10px 14px; border-radius: 9px; }
.notice { background: color-mix(in srgb, var(--accent) 12%, var(--panel)); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); padding: 10px 14px; border-radius: 9px; }

/* dashboard */
.dash { padding: 40px 0 80px; }
.dash-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; margin-bottom: 24px; }
.dash-head h1 { font-size: 2rem; margin: 0; }
.dash-head p { margin: 0; }
.usage { min-width: 280px; }
.usage-label { display: flex; justify-content: space-between; gap: 12px; font-size: .88rem; color: var(--muted); margin-bottom: 6px; }
.usage-label b { color: var(--ink); font-family: var(--mono); font-weight: 500; }
.bar { height: 8px; border-radius: 99px; background: var(--panel-2); overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--accent); border-radius: 99px; }
.dash-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 20px; margin-bottom: 20px; }
@media (max-width: 900px) { .dash-grid { grid-template-columns: 1fr; } }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 22px; min-width: 0; }
.panel h2 { font-size: 1.2rem; display: flex; align-items: baseline; gap: 10px; }
.panel h3 { font-size: 1rem; margin-top: 24px; }
.agent { display: grid; gap: 8px; padding: 14px 0; border-top: 1px solid var(--line); }
.agent-main { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.agent-main b { font-family: var(--mono); font-weight: 600; }
.agent-keys { display: flex; flex-wrap: wrap; gap: 8px; }
.key-chip { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 8px; padding: 3px 10px; font-size: .85rem; }
.key-chip form, .agent-actions form { margin: 0; }
.agent-actions { display: flex; gap: 14px; align-items: center; }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.inline-form input { flex: 1 1 140px; }
.badge { display: inline-block; font: 600 .75rem var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 3px 9px; border-radius: 6px; background: var(--panel-2); margin-right: 6px; }
.badge.pro { background: var(--ink); color: var(--bg); }
.compose { display: grid; grid-template-columns: 170px 190px 1fr auto; gap: 8px; margin-bottom: 16px; }
@media (max-width: 760px) { .compose { grid-template-columns: 1fr; } }
.feed { display: grid; gap: 0; max-height: 560px; overflow-y: auto; }
.feed-msg { padding: 12px 0; border-top: 1px solid var(--line); }
.feed-msg p { margin: 4px 0 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.feed-meta { display: flex; gap: 6px; align-items: baseline; flex-wrap: wrap; font-size: .85rem; }
.feed-meta b { font-family: var(--mono); font-weight: 600; }
.feed-meta time { margin-left: auto; color: var(--muted); }
.arrow { color: var(--muted); }
.tag { font: 600 .68rem var(--mono); text-transform: uppercase; background: var(--panel-2); padding: 1px 6px; border-radius: 4px; color: var(--muted); }
.empty { color: var(--muted); padding: 12px 0; }

/* prose */
.prose h2 { margin-top: 2em; font-size: 1.5rem; }
.prose ul { padding-left: 1.2em; }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table td { border-top: 1px solid var(--line); padding: 10px 8px; vertical-align: top; }
.table td:first-child { white-space: nowrap; }
@media (max-width: 640px) { .table td:first-child { white-space: normal; } }
.narrow .code, .narrow .tabs { margin-bottom: 24px; }