/*
 * OnTopOfAI: editorial brief design system (static build).
 * Paper + ink + one brass "summit" accent. Serif for display, Inter for text.
 */
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4.woff2) format("woff2");font-weight:400 800;font-style:normal;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4-italic.woff2) format("woff2");font-weight:400 600;font-style:italic;font-display:swap}
@font-face{font-family:"Inter";src:url(fonts/inter.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

:root{
  --bg:#faf9f6; --surface:#fff; --text:#14171b; --muted:#52565d;
  --accent:#8c5f1e; --accent-hover:#714b16; --accent-soft:#f1e4c9; --ember:#e0a23c;
  --line:#dedbd0; --tint:#ece9e0; --ink:#14171b; --on-dark:#f5f4ef;
  --danger:#b3261e; --success:#2b6b45; --note-bg:#f1eee3;
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:"Inter",ui-sans-serif,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --wrap:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--text);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;font-feature-settings:"cv11","ss01"}
img,svg{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
a:hover{color:var(--accent-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.on-dark :focus-visible{outline-color:var(--ember)}
h1,h2,h3{font-family:var(--serif);margin:0 0 .5em;color:var(--text);text-wrap:balance}
h1{font-size:clamp(34px,5.4vw,58px);line-height:1.05;font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(25px,3.2vw,34px);line-height:1.15;font-weight:700;letter-spacing:-.012em}
h3{font-size:21px;line-height:1.3;font-weight:600}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}
.wrap.narrow{max-width:var(--wrap)}
.narrow>*{max-width:760px}
.lead{font-size:19px;line-height:1.6;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:14px;line-height:1.55}
.kicker{font:600 13px/1.4 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:16px;top:-60px;background:var(--accent);color:#fff;padding:10px 16px;border-radius:6px;z-index:100}
.skip:focus{top:16px;color:#fff}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.masthead{display:none;background:var(--bg);border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}
.masthead .wrap{display:flex;justify-content:space-between;height:32px;align-items:center}
@media(min-width:900px){.masthead{display:block}}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:0;text-decoration:none;flex-shrink:0}
.brand img{height:34px;width:auto}
.nav-links{display:none;list-style:none;margin:0;padding:0;gap:26px;align-items:center}
.nav-links a{font:600 14px var(--sans);color:var(--muted);text-decoration:none;letter-spacing:.01em}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--accent)}
.nav-cta.btn{display:none}
.menu-btn{width:44px;height:44px;border:0;background:none;color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:6px}
.menu-panel{border-top:1px solid var(--line);background:var(--surface)}
.menu-panel[hidden]{display:none}
.menu-panel ul{list-style:none;margin:0;padding:12px 0 18px}
.menu-panel a{display:block;padding:12px 10px;font:600 15px var(--sans);color:var(--muted);text-decoration:none;border-radius:6px}
.menu-panel a[aria-current]{background:var(--accent-soft);color:var(--accent)}
.menu-panel .btn{margin-top:8px;width:100%}
@media(min-width:900px){.nav{height:66px}.nav-links{display:flex}.nav-cta.btn{display:inline-flex}.menu-btn,.menu-panel{display:none!important}}

/* buttons */
.btn{white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 22px;border-radius:6px;border:1.5px solid var(--accent);background:var(--accent);color:#fff;font:600 14px var(--sans);letter-spacing:.02em;text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.btn:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff}
.btn-sm{height:40px;padding:0 16px}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--text)}
.btn-ghost:hover{background:transparent;color:var(--accent);border-color:var(--accent)}
.on-dark .btn-ghost{color:var(--on-dark);border-color:rgba(255,255,255,.4)}
.on-dark .btn-ghost:hover{background:rgba(255,255,255,.08);color:#fff;border-color:#fff}
.btn:disabled{opacity:.6;cursor:wait}
.btn-row{display:flex;flex-direction:column;gap:12px}
@media(min-width:560px){.btn-row{flex-direction:row;flex-wrap:wrap}}

/* sections */
section{padding:48px 0}
@media(min-width:768px){section{padding:72px 0}}
.band{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.rule-top{border-top:1px solid var(--line)}

/* hero */
.hero{background:var(--ink);color:var(--on-dark);padding:40px 0 48px;position:relative;overflow:hidden}
@media(min-width:768px){.hero{padding:64px 0 72px}}
.hero h1{color:var(--on-dark)}
.hero .lead{color:rgba(245,244,239,.78);max-width:540px;margin-bottom:28px}
.hero-grid{display:grid;gap:40px;align-items:center}
.hero-grid>*,.grid>*{min-width:0}
@media(min-width:900px){.hero-grid{grid-template-columns:1.1fr .9fr;gap:56px}}
.issue-tag{font:italic 500 19px var(--serif);color:var(--ember);margin:0 0 16px}
.hero-peak{position:absolute;right:-90px;bottom:-70px;width:520px;opacity:.06;pointer-events:none}

/* forms */
.lead-form{max-width:540px}
.lead-form .row{display:flex;flex-direction:column;gap:10px}
@media(min-width:560px){.lead-form.inline .row{flex-direction:row}}
.lead-form label{display:block;font:600 13px var(--sans);margin:0 0 6px}
.field{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--text);font:400 16px var(--sans)}
textarea.field{height:auto;min-height:130px;padding:12px 14px;resize:vertical}
select.field{appearance:auto}
.field:focus{outline:2px solid var(--accent);outline-offset:2px}
.on-dark .field{border-color:transparent}
.on-dark .field:focus{outline-color:var(--ember)}
.form-note{font-size:13px;color:var(--muted);margin:10px 0 0}
.on-dark .form-note{color:rgba(245,244,239,.66)}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-msg{margin-top:12px;font-size:14px}
.form-msg.err{color:var(--danger)}
.on-dark .form-msg.err{color:#ffb4ab}
.form-done{border:1px solid var(--line);border-left:4px solid var(--success);border-radius:6px;background:#fff;color:var(--text);padding:16px 18px}
.form-done strong{display:block;font:700 18px var(--serif);margin-bottom:4px}
.form-done p{margin:0 0 10px;color:var(--muted);font-size:15px}
.form-done a{font-weight:600}
.stack{display:grid;gap:16px}
.stack .row{gap:16px}

/* brief mock (hero visual) */
.mock{background:var(--bg);color:var(--text);border-radius:8px;box-shadow:0 30px 60px -20px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.1);overflow:hidden;transform:rotate(1.2deg);max-width:440px;margin:0 auto}
.mock-top{display:flex;align-items:center;gap:10px;padding:14px 18px;background:#fff;border-bottom:1px solid var(--line)}
.mock-top img{height:26px;width:auto}
.mock-top span{margin-left:auto;font:italic 500 15px var(--serif);color:var(--accent)}
.mock-body{padding:20px 20px 8px}
.mock h3{font-size:20px;margin:0 0 14px;line-height:1.25}
.beat{position:relative;padding:12px 14px 12px 18px;background:#fff;border:1px solid var(--line);border-radius:4px;margin-bottom:10px}
.beat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--ember)}
.beat:nth-child(3)::before{background:var(--accent)}
.beat:nth-child(4)::before{background:var(--ink)}
.beat b{display:block;font:700 12px var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:3px}
.beat span{display:block;font-size:14px;line-height:1.45;color:var(--text)}
.beat i{display:inline-block;width:11px;height:11px;border:2px solid var(--accent);border-radius:2px;margin-right:8px;vertical-align:-1px}
.mock-foot{padding:10px 20px 16px;font-size:12px;color:var(--muted)}

/* grids & cards */
.grid{display:grid;gap:20px}
@media(min-width:640px){.grid.c2{grid-template-columns:repeat(2,1fr)}.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.grid.c3{grid-template-columns:repeat(3,1fr)}.grid.c4{grid-template-columns:repeat(4,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:24px}
a.card{text-decoration:none;color:inherit;display:flex;flex-direction:column;transition:border-color .2s}
a.card:hover{border-color:var(--accent)}
a.card:hover h3{color:var(--accent)}
.num{font:600 18px var(--serif);color:var(--accent)}
.card .num{margin-bottom:10px;display:block}
.card p:last-child{margin-bottom:0}
.card .more{margin-top:auto;padding-top:14px;font:600 13px var(--sans);letter-spacing:.02em;color:var(--accent)}
.beat-card{position:relative;padding-top:28px;overflow:hidden}
.beat-card::before{content:"";position:absolute;left:0;right:0;top:0;height:5px;background:var(--line)}
.beat-card.now::before{background:var(--ember)}
.tag{display:inline-block;background:var(--tint);color:var(--muted);border-radius:99px;padding:2px 10px;font-size:12px}
.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}

/* pricing */
.price{font:700 44px/1.1 var(--serif);margin:4px 0 4px}
.price small{font:400 16px var(--sans);color:var(--muted)}
.plan{display:flex;flex-direction:column}
.plan ul{padding:0;margin:8px 0 24px;list-style:none;flex:1;display:grid;gap:8px;color:var(--muted);font-size:15px}
.plan li{padding-left:22px;position:relative}
.plan li::before{content:"";position:absolute;left:2px;top:.6em;width:8px;height:8px;background:var(--accent);border-radius:50%}
.plan.featured{border:2px solid var(--accent);position:relative}
.plan .flag{position:absolute;top:-13px;left:22px;background:var(--accent);color:#fff;border-radius:99px;padding:2px 12px;font:600 12px var(--sans)}
.plan .btn{width:100%}

/* lists */
.ticks{list-style:none;padding:0;margin:0;display:grid;gap:12px;color:var(--muted)}
.ticks li{display:flex;gap:12px}
.ticks li::before{content:"";flex:none;margin-top:.62em;width:7px;height:7px;background:var(--accent);border-radius:50%}
details{border-bottom:1px solid var(--line);padding:18px 0}
details:first-of-type{border-top:1px solid var(--line)}
summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;font:600 20px/1.3 var(--serif)}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-size:24px;transition:transform .2s;flex:none}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:12px 0 0;color:var(--muted)}

/* notes */
.note{border-left:3px solid var(--accent);background:var(--note-bg);border-radius:0 6px 6px 0;padding:14px 18px;font-size:14px;line-height:1.55;color:var(--muted)}
.note p{margin:0}
.callout{background:var(--accent-soft);border-radius:6px;padding:18px 22px;font-size:15px;color:var(--muted)}
.callout p{margin:0 0 8px}.callout p:last-child{margin:0}

/* dark cta */
.cta-dark{background:var(--ink);color:var(--on-dark);border-radius:8px;padding:28px}
@media(min-width:768px){.cta-dark{padding:36px}}
.cta-dark h2{color:var(--on-dark)}
.cta-dark p{color:rgba(245,244,239,.8)}

/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
table{width:100%;min-width:480px;border-collapse:collapse;text-align:left;font-size:14px}
th{font:600 13px var(--sans);letter-spacing:.02em;padding:12px 16px;background:#f7f5ee;border-bottom:1px solid var(--line)}
td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--muted)}
tr:last-child td{border-bottom:0}
td:first-child{color:var(--text);font-weight:600}

/* house rules */
.rules{display:grid;gap:20px}
@media(min-width:800px){.rules{grid-template-columns:repeat(3,1fr)}}
.rule-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:6px;padding:28px 20px 20px;overflow:hidden}
.rule-card::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:var(--c)}
.rule-card ul{margin:0;padding:0;list-style:none;display:grid;gap:12px;font-size:14px;color:var(--muted)}
.rule-card h2{font-size:21px;margin-bottom:14px}

/* footer */
.site-footer{background:var(--ink);color:var(--on-dark);padding:56px 0 32px}
.site-footer a{color:var(--on-dark)}
.foot-grid{display:grid;gap:32px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.15)}
@media(min-width:800px){.foot-grid{grid-template-columns:1.3fr 1fr 1fr}}
.site-footer .brand img{height:34px}
.site-footer p{color:rgba(245,244,239,.72);font-size:14px;max-width:360px}
.foot-label{font:600 12px var(--sans);letter-spacing:.08em;text-transform:uppercase;color:rgba(245,244,239,.55);margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.site-footer ul a{font-size:14px;text-decoration:none;color:rgba(245,244,239,.9)}
.site-footer ul a:hover{color:#fff;text-decoration:underline}
.foot-note{margin:28px 0 0;border:1px solid rgba(255,255,255,.2);border-left:3px solid var(--ember);border-radius:4px;background:rgba(255,255,255,.05);padding:12px 16px;font-size:12px;line-height:1.55;color:rgba(245,244,239,.8)}
.copy{margin:20px 0 0;font-size:12px;color:rgba(245,244,239,.6)}

/* issue page */
.issue-hero{background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px}
@media(min-width:768px){.issue-hero{padding:32px}}
.issue-hero p{color:var(--muted)}
.crumb{font-size:14px;margin-bottom:20px}

@media(prefers-reduced-motion:no-preference){
  .reveal{animation:rise .6s cubic-bezier(.16,1,.3,1) both}
  .reveal.d2{animation-delay:.12s}
  @keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
}
@media print{.site-header,.site-footer,.no-print{display:none!important}body{background:#fff}}