/* Kumia landing — v8. Plain, like instinct.com: white page, serif text, narrow column, no decoration. */
:root{
  --bg:#ffffff; --text:#111214; --muted:#5b5f6b; --dim:#8a8f9c; --line:#e6e7eb; --line-2:#d6d8df;
  --link:#111214; --accent:#4f5bd5;
  --serif:'Newsreader',Georgia,'Times New Roman',serif;
  --ui:'Inter',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  --display:var(--serif); --body:var(--serif);
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:1120px; --col:620px; --gutter:24px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--serif);font-size:18px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--link)}
p,h1,h2,h3{margin:0;font-weight:400}
ul{margin:0;padding:0;list-style:none}
figure{margin:0}
button{font:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

.sky,#stars{display:none}
.rise{animation:none}

.wrap{max-width:var(--max);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.wrap-wide{max-width:1240px;margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}

/* type */
h1{font-size:26px;line-height:1.4}
h2{font-size:26px;line-height:1.3;letter-spacing:-.005em}
h3{font-size:19px;line-height:1.35}
.lead{font-size:18px;line-height:1.55;color:var(--muted);max-width:40em}
.grad{color:inherit;background:none}

/* buttons = plain links */
.btn{display:inline-flex;align-items:center;gap:4px;height:auto;padding:0;border:0;background:none;color:var(--text);font:inherit;font-size:17px;text-decoration:none;cursor:pointer;white-space:nowrap}
.btn::after{content:"›";margin-left:4px;color:var(--text)}
.btn:hover{text-decoration:underline;text-underline-offset:4px}
.btn.sm{font-size:14px}
.btn.ghost{color:var(--muted)}

/* nav */
.nav{position:static;background:var(--bg)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:22px;text-decoration:none;letter-spacing:-.01em}
.brand i{width:12px;height:12px;border-radius:50%;background:var(--text);display:inline-block}
.nav-links{display:flex;gap:22px;font-size:14px;font-family:var(--ui);color:var(--muted)}
.nav-links a{text-decoration:none;color:var(--muted)}
.nav-links a:hover{color:var(--text)}
.nav .btn.sm{font-family:var(--ui)}

/* hero */
.hero-i{padding:56px 0 24px}
.hero-i .wrap{max-width:calc(var(--col) + 2*var(--gutter));margin-left:0}
.hero-i p{font-size:20px;line-height:1.5;color:var(--text);text-wrap:pretty}
.hero-i p+p{margin-top:20px}
.hero-i a{color:var(--text);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;text-decoration-color:#b9bcc6}
.hero-i a:hover{text-decoration-color:var(--text)}
.hero-i a.go{text-decoration:none;font-size:20px}
.hero-i a.go::after{content:" ›"}
.verbs .l2{display:inline}

/* demo */
.demo{padding:36px 0 24px}
.demo-tabs{margin-top:14px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:12px;background:#fafafb;padding:4px}
.demo-tabs button{text-align:left;padding:12px 14px;border:0;border-radius:9px;background:transparent;cursor:pointer;display:flex;flex-direction:column;gap:3px;position:relative;overflow:hidden;font-family:var(--ui)}
.demo-tabs button small{font-size:11px;letter-spacing:.02em;color:var(--dim)}
.demo-tabs button b{font-weight:600;font-size:14px;color:var(--text)}
.demo-tabs button span{font-size:13px;color:var(--muted);line-height:1.4}
.demo-tabs button[aria-selected=true]{background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.06),0 0 0 1px var(--line)}
.demo-tabs button i{position:absolute;left:14px;right:14px;bottom:6px;height:2px;background:var(--text);transform-origin:left;transform:scaleX(0)}
.demo-tabs button[aria-selected=true] i{animation:fillx var(--dur,6s) linear forwards}
@keyframes fillx{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.tabs.paused button i{animation-play-state:paused}

.usecase{margin-top:18px;max-width:46em}
.usecase .cap{display:none}
.usecase[data-active=chats] .cap[data-scene=chats],.usecase[data-active=numbers] .cap[data-scene=numbers],.usecase[data-active=followups] .cap[data-scene=followups],.usecase[data-active=prep] .cap[data-scene=prep]{display:block}
.usecase .cap b{display:block;font-weight:500;font-size:18px;margin-bottom:6px}
.usecase .cap p{font-size:17px;line-height:1.6;color:var(--muted)}
figure.app figcaption{font-family:var(--serif);font-size:15px;line-height:1.55;color:var(--muted);padding:12px 2px 0;background:none;border:0}
.chat .chat-cap{margin:10px 2px 0;font-family:var(--serif);font-size:14px;line-height:1.5;color:#5b5f6b}

/* use-case sections */
.uc{padding:64px 0 24px}
.uc .wrap{max-width:calc(900px + 2*var(--gutter))}
.uc-n{font-family:var(--ui);font-size:13px;color:var(--dim);margin-bottom:8px}
.uc h2{font-size:32px;line-height:1.25}
.uc-sub{margin-top:10px;font-size:18px;line-height:1.55;color:var(--muted);max-width:40em}
.uc .panel{margin-top:26px;font-size:14px}
.panel .main{padding:18px 20px 20px}
.panel .feed{gap:14px}
.panel .msg .bub{max-width:none}
.panel .card{max-width:none}
.panel .sys{font-size:13px}
.panel figcaption{font-family:var(--serif)!important;font-size:15px!important;color:var(--muted)!important;background:#fafafb}
.uc+.uc{padding-top:56px}
#uc4{padding-bottom:72px}

/* sections */
.section{padding:72px 0}
.sec-head{max-width:40em;margin-bottom:28px}
.sec-head .lead{margin-top:10px}

/* feature rows */
.feat{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.7fr);gap:48px;align-items:center;padding:48px 0;border-top:1px solid var(--line)}
.feat:first-child{border-top:0;padding-top:0}
.feat.rev{grid-template-columns:minmax(0,1.7fr) minmax(0,.8fr)}
.feat.rev .feat-txt{order:2}
.feat-txt h2{font-size:26px}
.feat-txt p{margin-top:12px;color:var(--muted);font-size:17px;line-height:1.6;max-width:32em}
.feat .app{font-size:12.5px}

/* week */
.week{display:grid;grid-template-columns:1fr 1fr;gap:18px}

/* download */
.os{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.os-card{padding:20px 22px;border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:6px;background:#fff}
.os-card h3{font-size:20px}
.os-card p{color:var(--muted);font-size:15px;flex:1}
.os-card .btn{margin-top:10px;font-size:16px;align-self:flex-start}
.integ{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.integ li{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;font-family:var(--ui)}
.integ li b{display:block;font-weight:600;font-size:14px}
.integ li span:not(.ico){font-size:12px;color:var(--dim)}
.integ li.soon{color:var(--dim);border-style:dashed}
.integ .ico{width:34px;height:34px;border-radius:9px;flex:none;display:grid;place-items:center;background:#fff;border:1px solid var(--line)}
.integ .ico img{width:20px;height:20px;object-fit:contain;display:block}
.integ li.soon .ico img{opacity:.45;filter:grayscale(1)}
.fine{margin-top:16px;font-size:15px;color:var(--dim)}

/* behind */
.behind-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.behind-grid p{color:var(--text);font-size:18px;line-height:1.6;max-width:36em}

/* access */
.access{padding-bottom:96px}
.access h2{font-size:26px}
.form{margin-top:22px;display:flex;gap:14px;align-items:center;max-width:560px}
.form input{flex:1;min-width:0;height:44px;padding:0 0 0 0;border:0;border-bottom:1px solid var(--line-2);background:transparent;color:var(--text);font:inherit;font-size:18px;border-radius:0}
.form input::placeholder{color:var(--dim)}
.form input:focus{outline:none;border-bottom-color:var(--text)}
.form .btn{font-size:18px}
.note{margin-top:12px;font-size:15px;color:#1a7f4b;min-height:1.3em}
.note.err{color:#b42318}

/* footer */
.footer{border-top:1px solid var(--line)}
.footer .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px;font-size:13px;font-family:var(--ui);color:var(--dim)}
.footer .brand{font-size:16px}
.foot-links{display:flex;gap:18px}
.foot-links a{color:var(--dim);text-decoration:none}
.foot-links a:hover{color:var(--text)}

/* responsive */
@media (max-width:980px){
  .nav-links{display:none}
  .feat,.feat.rev{grid-template-columns:1fr;gap:20px;padding:36px 0}
  .feat.rev .feat-txt{order:0}
  .demo-tabs{grid-template-columns:1fr 1fr}
  .week,.behind-grid{grid-template-columns:1fr}
  .os,.integ{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--gutter:16px}
  body{font-size:17px}
  .hero-i{padding-top:28px}
  .hero-i p{font-size:18px}
  .section{padding:52px 0}
  .demo-tabs{grid-template-columns:1fr}
  .os,.integ{grid-template-columns:1fr}
  .form{flex-direction:column;align-items:stretch}
  .footer .wrap{height:auto;padding:18px 0;flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .demo-tabs button i{animation:none;transform:scaleX(1)}
}