/* Booze Napkin Math marketing site. Same design tokens as the app. No third-party assets. */
@font-face{font-family:"Inter";font-style:normal;font-weight:100 900;font-display:swap;src:url("fonts/inter-latin-wght-normal.woff2") format("woff2-variations"),url("fonts/inter-latin-wght-normal.woff2") format("woff2")}
:root{
  --bg:#f5f5f7;--surface:#fff;--surface-2:#f0f0f2;--fg:#0b0b0c;--muted:#6b6b73;--line:rgba(0,0,0,.08);
  --tiffany:#0abab5;--tiffany-light:#81d8d0;--accent:#0b7480;--accent-ui:#0abab5;--fill:#0abab5;--fill-hover:#81d8d0;--on-fill:#00211f;--chip-bg:#81d8d0;--chip-fg:#00211f;--accent-fg:#00211f;
  --accent-soft:rgba(10,186,181,.12);--hero-tint:rgba(129,216,208,.22);
  --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 30px rgba(0,0,0,.06);--radius:16px;--radius-sm:12px;
  --max:1080px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#000;--surface:#121214;--surface-2:#1c1c1f;--fg:#f5f5f7;--muted:#9a9aa3;--line:rgba(255,255,255,.09);
  --tiffany:#0abab5;--accent:#86dce2;--accent-ui:#0abab5;--fill:#0abab5;--fill-hover:#81d8d0;--on-fill:#00211f;--chip-bg:rgba(129,216,208,.14);--chip-fg:#86dce2;--accent-fg:#00211f;--accent-soft:rgba(129,216,208,.14);
  --hero-tint:rgba(129,216,208,.10);--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 30px rgba(0,0,0,.5)}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 "Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1,h2,h3{line-height:1.12;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,9vw,4.2rem);font-weight:800}
h2{font-size:clamp(1.6rem,5.5vw,2.3rem);font-weight:750}
h3{font-size:1.2rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
section{padding:56px 0}
.lede{color:var(--muted);font-size:1.1rem;max-width:44ch}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:650;letter-spacing:.04em;text-transform:uppercase;color:var(--chip-fg);background:var(--chip-bg);padding:6px 12px;border-radius:999px;margin-bottom:18px}
/* header */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:saturate(180%) blur(16px);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;height:60px}
.brand{min-height:44px;display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.01em;color:var(--fg);text-decoration:none}
.brand img{width:28px;height:28px;border-radius:7px}
nav.top{display:none;gap:22px}
nav.top a{color:var(--muted);text-decoration:none;font-weight:550;font-size:.95rem;display:inline-flex;align-items:center;min-height:44px;padding:0 4px}
nav.top a:hover{color:var(--fg)}
@media (min-width:760px){nav.top{display:flex}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:999px;font:inherit;font-weight:650;text-decoration:none;border:1px solid transparent;cursor:pointer}
.btn.primary{background:var(--fill);color:var(--on-fill)}
.btn.primary:hover{background:var(--fill-hover)}
.btn.ghost{background:var(--surface);color:var(--fg);border-color:var(--line)}
.btn.small{min-height:44px;padding:0 16px;font-size:.92rem}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
/* hero */
.hero{padding:48px 0 24px;background:radial-gradient(900px 420px at 80% -10%,var(--hero-tint),transparent 70%)}
.hero .wrap{display:grid;gap:36px}
.hero .tagline{font-size:clamp(1.15rem,4vw,1.5rem);font-weight:650;color:var(--accent);margin:-.2em 0 .8em}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.phones{display:flex;gap:16px;justify-content:center;align-items:flex-start}
.shot{border-radius:26px;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--surface);overflow:hidden}
.phones .shot{width:min(46%,250px)}
.phones .shot:nth-child(2){margin-top:34px}
@media (min-width:860px){.hero{padding:80px 0 40px}.hero .wrap{grid-template-columns:1.1fr .9fr;align-items:center}}
/* cards */
.grid2{display:grid;gap:20px}
@media (min-width:760px){.grid2{grid-template-columns:1fr 1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.card ul{margin:0 0 1em;padding-left:1.1em}
.card li{margin:.35em 0}
.card .shot{width:min(240px,70%);margin:18px auto 0}
.tag{display:inline-block;font-size:.78rem;font-weight:700;color:var(--chip-fg);background:var(--chip-bg);padding:4px 10px;border-radius:999px;margin-bottom:10px}
.section-head{margin-bottom:28px}
.split{display:grid;gap:32px;align-items:center}
@media (min-width:860px){.split{grid-template-columns:1fr 1fr}}
.sheet-img{max-width:440px;margin:0 auto;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden;background:#fff}
.checks{list-style:none;padding:0;margin:0 0 1.2em}
.checks li{position:relative;padding-left:30px;margin:.6em 0}
.checks li::before{content:"";position:absolute;left:0;top:.28em;width:18px;height:18px;border-radius:50%;background:var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230b7480' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/12px no-repeat}
.band{background:var(--surface);border-block:1px solid var(--line)}
.facts{display:grid;gap:16px}
@media (min-width:760px){.facts{grid-template-columns:repeat(3,1fr)}}
.fact{padding:6px 0}
.fact strong{display:block;font-size:1.15rem;margin-bottom:4px}
.fact span{color:var(--muted)}
ol.steps{margin:0;padding-left:1.2em}
ol.steps li{margin:.5em 0}
.kbd{display:inline-block;padding:1px 8px;border-radius:8px;background:var(--surface-2);border:1px solid var(--line);font-weight:600;font-size:.92em}
dl.facts-list{margin:0 0 1.2em}
dl.facts-list div{display:grid;grid-template-columns:120px 1fr;gap:12px;padding:10px 0;border-top:1px solid var(--line)}
dl.facts-list dt{font-weight:650}
dl.facts-list dd{margin:0;color:var(--muted)}
.advertise{background:linear-gradient(180deg,var(--accent-soft),transparent)}
/* faq */
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);margin:10px 0;padding:0 18px}
summary{cursor:pointer;font-weight:650;min-height:44px;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--accent)}
details[open] summary::after{content:"\2212"}
details p{color:var(--muted)}
/* footer */
footer{border-top:1px solid var(--line);padding:36px 0 48px;color:var(--muted);font-size:.92rem}
footer .links{display:flex;flex-wrap:wrap;gap:8px 14px;margin:6px 0 10px}
footer .links a{display:inline-flex;align-items:center;min-height:44px;padding:0 6px}
footer a{color:var(--muted)}
footer .age{font-weight:650;color:var(--fg)}
/* legal pages */
.legal{max-width:760px;margin:0 auto;padding:40px 20px 24px}
.legal h1{font-size:clamp(2rem,7vw,2.8rem)}
.legal h2{font-size:1.35rem;margin-top:1.8em}
.legal .meta{color:var(--muted)}
.legal li{margin:.4em 0}
.notfound{min-height:60vh;display:grid;place-content:center;text-align:center;padding:40px 20px}
@media (max-width:420px){dl.facts-list div{grid-template-columns:1fr;gap:2px}.card{padding:20px}}

/* a11y + polish */
.skip{position:absolute;left:12px;top:-60px;z-index:20;background:var(--fill);color:var(--on-fill);padding:12px 18px;border-radius:10px;font-weight:650;text-decoration:none}
.skip:focus{top:8px}
:target{scroll-margin-top:76px}
.narrow{max-width:780px}
.center{text-align:center;justify-content:center;margin-inline:auto}
.note{font-size:.92rem;color:var(--muted);margin:.8em 0 0}
.quick-install{max-width:460px;margin-top:20px}
.quick-install summary{font-size:.95rem}
.quick-install p{margin:0 0 .7em;font-size:.95rem}
.quick-install p:last-child a{display:inline-flex;align-items:center;padding:0 2px;min-height:44px}
.card .btn,.advertise .btn{margin-top:4px}
.hero .lede{margin-bottom:1.4em}
section.band{padding:56px 0}
@media (max-width:420px){section{padding:44px 0}.hero{padding-top:32px}.cta-row .btn{flex:1 1 100%}}
nav.top a{min-width:44px;justify-content:center;text-align:center}
dl.facts-list dd a{display:inline-flex;align-items:center;min-height:44px}

/* email signup */
.signup-card{max-width:560px;margin:0 auto}
.signup-card h2{margin-top:.2em}
.signup-form{margin-top:14px}
.signup-label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.signup-row{display:flex;gap:10px;align-items:stretch}
.signup-row input{flex:1;min-width:0;min-height:48px;padding:0 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--fg);font:inherit;font-size:16px}
.signup-row input:focus{outline:3px solid var(--accent);outline-offset:1px;border-color:var(--fill)}
.signup-row .btn{min-height:48px;white-space:nowrap}
.signup-consent{margin:10px 0 0;font-size:.85rem;color:var(--muted)}
.signup-consent a{color:var(--muted);text-decoration:underline;text-underline-offset:2px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
@media (max-width:420px){.signup-row{flex-direction:column}}

/* Tiffany header stripe */
.site-header{border-top:4px solid var(--fill);background-clip:padding-box}