:root{--paper:#F7F6F2;--white:#FFFFFF;--ink:#151912;--ink2:#4B5147;--ink3:#767C71;--line:#E3E2DA;--line2:#D3D2C9;--turf:oklch(0.50 0.11 150);--turf-h:oklch(0.44 0.11 150);--turf-tint:oklch(0.955 0.025 150);--turf-tint2:oklch(0.91 0.045 150);--forest:oklch(0.25 0.035 155);--forest2:oklch(0.30 0.04 155);--forest-line:oklch(0.38 0.035 155);--mint:oklch(0.82 0.09 150);--amber:oklch(0.72 0.12 75);--red:oklch(0.58 0.15 30);--sans:"Geist","Helvetica Neue",Helvetica,Arial,sans-serif;--mono:"Geist Mono",ui-monospace,monospace;--bb:Montserrat,"Helvetica Neue",sans-serif;--r:14px;--wrap:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--turf);text-decoration:none}a:hover{color:var(--turf-h);text-decoration:underline}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-0.025em;line-height:1.08;text-wrap:balance}p{margin:0;text-wrap:pretty}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--mono);font-size:13px;color:var(--turf);letter-spacing:0.02em;display:flex;gap:10px;align-items:center}
.muted{color:var(--ink2)}.small{font-size:14px}
sup.fn{font-size:0.45em;vertical-align:super;font-family:var(--mono);color:var(--ink3);margin-left:2px;letter-spacing:0}
sup.fn a{color:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border-radius:10px;font-family:var(--sans);font-size:16px;font-weight:550;border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,color .15s;white-space:nowrap;text-decoration:none}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--turf);color:#fff}.btn-primary:hover{background:var(--turf-h);color:#fff}
.btn-ghost{background:var(--white);color:var(--ink);border-color:var(--line2)}.btn-ghost:hover{border-color:var(--ink3);color:var(--ink)}
.btn-sm{height:40px;padding:0 16px;font-size:15px;border-radius:9px}
.btn-light{background:#fff;color:var(--forest)}.btn-light:hover{background:var(--turf-tint);color:var(--forest)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
section{padding:112px 0}
.sec-head{display:grid;gap:18px;max-width:760px;margin-bottom:56px}
.sec-head h2{font-size:clamp(34px,4.4vw,52px)}
.sec-head p{font-size:19px;color:var(--ink2);max-width:620px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in oklab,var(--paper) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.site-header.scrolled{border-bottom-color:var(--line)}
.nav{height:68px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:baseline;gap:9px;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand-bayi{font-family:var(--sans);font-weight:700;font-size:24px;letter-spacing:-0.04em;line-height:1}
.brand-bayi i{font-style:normal;color:var(--turf)}
.brand-by{font-size:12px;color:var(--ink3);display:flex;gap:4px;align-items:baseline;white-space:nowrap}
.brand-by b{font-family:var(--bb);font-weight:800;letter-spacing:-0.04em;color:var(--ink);font-size:13px}
.nav-links{display:flex;gap:26px;flex:1}
.nav-links a{color:var(--ink2);font-size:15px;font-weight:500}.nav-links a:hover,.nav-links a.on{color:var(--ink);text-decoration:none}
.nav-right{display:flex;gap:18px;align-items:center}
.nav-login{color:var(--ink2);font-size:15px;font-weight:500}.nav-login:hover{color:var(--ink);text-decoration:none}
.nav-burger{display:none;background:none;border:1px solid var(--line2);border-radius:9px;width:44px;height:44px;cursor:pointer;font-family:var(--mono);font-size:12px;color:var(--ink)}
.mobile-menu{display:none}
@media(max-width:940px){.nav-links,.nav-login,.nav-right .btn{display:none}.nav-burger{display:block;margin-left:auto}.nav-right{margin-left:auto}
.mobile-menu.open{display:grid;gap:4px;padding:12px 28px 24px;border-top:1px solid var(--line);background:var(--paper)}
.mobile-menu a{padding:12px 0;font-size:18px;color:var(--ink);border-bottom:1px solid var(--line)}.mobile-menu .btn{margin-top:14px;color:#fff;border:0}}
/* footer */
.site-footer{background:var(--white);border-top:1px solid var(--line);padding:72px 0 40px;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,minmax(0,1fr));gap:40px}
.foot-grid h4{font-size:13px;font-family:var(--mono);font-weight:500;color:var(--ink3);letter-spacing:0;margin-bottom:14px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}.foot-grid ul a{color:var(--ink2)}.foot-grid ul a:hover{color:var(--ink)}
.notes-form{display:flex;gap:8px;margin-top:18px;max-width:380px}
.notes-form input{flex:1;min-width:0}
.footnotes{margin-top:56px;padding-top:24px;border-top:1px solid var(--line);display:grid;gap:6px;font-size:13px;color:var(--ink3)}
.foot-base{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:28px;font-size:13px;color:var(--ink3)}
.foot-base a{color:var(--ink3)}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}
/* forms */
input,select,textarea{font-family:var(--sans);font-size:16px;height:48px;padding:0 14px;border:1px solid var(--line2);border-radius:10px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus{outline:2px solid var(--turf);outline-offset:1px;border-color:var(--turf)}
label.field{display:grid;gap:7px;font-size:15px;font-weight:500}
label.field span.hint{font-weight:400;color:var(--ink3);font-size:13px}
/* cards & misc */
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r)}
.tag{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:99px;font-size:12.5px;font-family:var(--mono);background:var(--turf-tint);color:var(--turf-h);white-space:nowrap}
.tag.grey{background:#EFEEE8;color:var(--ink2)}.tag.amber{background:oklch(0.95 0.05 80);color:oklch(0.45 0.1 70)}.tag.red{background:oklch(0.95 0.035 30);color:oklch(0.48 0.14 30)}
.dot{width:8px;height:8px;border-radius:50%;background:currentColor;display:inline-block;flex:none}
.placeholder{background:repeating-linear-gradient(135deg,#ECEBE4 0 10px,#E4E3DB 10px 20px);border-radius:var(--r);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:13px;color:var(--ink2);text-align:center;padding:20px}
.tbc{font-family:var(--mono);font-size:.8em;background:oklch(0.95 0.05 80);color:oklch(0.42 0.1 70);padding:1px 7px;border-radius:5px;letter-spacing:0}
/* FAQ */
.faq{border-top:1px solid var(--line2)}
.faq details{border-bottom:1px solid var(--line2)}
.faq summary{list-style:none;cursor:pointer;padding:26px 44px 26px 0;font-size:20px;font-weight:550;letter-spacing:-0.015em;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:22px;font-size:26px;font-weight:300;color:var(--ink3);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 44px 28px 0;color:var(--ink2);max-width:760px}
/* chat */
.chat{background:#EFEDE6;border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:8px;min-height:360px;font-size:15px}
.chat-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-family:var(--mono);color:var(--ink3);padding:0 4px 8px}
.msg{max-width:82%;padding:9px 13px 7px;border-radius:14px;line-height:1.4;opacity:0;transform:translateY(6px);transition:opacity .35s,transform .35s}
.msg.show{opacity:1;transform:none}
.msg .t{display:block;font-size:11px;font-family:var(--mono);color:var(--ink3);margin-top:3px;text-align:right}
.msg.in{background:#fff;align-self:flex-start;border-top-left-radius:4px}
.msg.out{background:oklch(0.93 0.06 145);align-self:flex-end;border-top-right-radius:4px}
.msg.sys{align-self:center;background:transparent;font-family:var(--mono);font-size:12px;color:var(--turf-h);padding:4px 10px;border:1px dashed var(--turf-tint2);border-radius:99px;max-width:none}
.typing{align-self:flex-end;display:none;gap:4px;padding:12px 14px;background:oklch(0.93 0.06 145);border-radius:14px}
.typing.show{display:flex}.typing i{width:6px;height:6px;border-radius:50%;background:var(--ink3);animation:blink 1s infinite}.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,100%{opacity:.25}50%{opacity:1}}
/* cookie */
.cookie{position:fixed;left:20px;bottom:20px;z-index:60;max-width:420px;background:var(--white);border:1px solid var(--line2);border-radius:14px;padding:18px 20px;box-shadow:0 12px 40px rgba(20,25,18,.12);font-size:14px;display:grid;gap:14px}
.cookie .btn-row .btn{height:40px;font-size:14px}
@media(max-width:600px){section{padding:76px 0}.wrap{padding:0 20px}.sec-head{margin-bottom:40px}.cookie{left:12px;right:12px;bottom:12px}}

/* de-AI pass: no pills, smaller radii, plainer labels */
:root{--r:6px}
.btn{border-radius:5px}.btn-sm{border-radius:5px}input,select,textarea{border-radius:5px}.nav-burger{border-radius:5px}.cookie{border-radius:6px}
.eyebrow{font-family:var(--sans);font-size:15px;font-weight:600;color:var(--ink);letter-spacing:0;gap:12px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--turf);flex:none}
.dark .eyebrow{color:#EEF1EC}.dark .eyebrow::before{background:var(--mint)}
.tag{height:auto;padding:0;border-radius:0;background:none!important;font-family:var(--sans);font-size:13px;font-weight:500;color:var(--turf-h)}
.tag.grey{color:var(--ink3)}.tag.amber{color:oklch(0.5 0.11 70)}.tag.red{color:oklch(0.5 0.14 30)}
.tbc{border-radius:2px}
.msg.sys{border:0;border-radius:0;border-top:1px solid var(--turf-tint2);border-bottom:1px solid var(--turf-tint2);font-family:var(--sans);font-size:13px;padding:6px 0;align-self:stretch;text-align:center}
.chat{border-radius:8px}.msg{border-radius:10px}.typing{border-radius:10px}