@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Thai:wght@400;500;600;700&display=swap");
:root{
  --bg:#ffffff; --bg-2:#f5f7f9; --panel:#ffffff; --line:#e4e7ec;
  --ink:#0f1720; --ink-2:#4a5360; --ink-3:#8a93a0;
  --accent:#0f9d8a; --accent-2:#12b8a0; --accent-soft:#e3f6f2; --dark:#0f1720;
  --shadow:0 1px 2px rgba(16,20,24,.05),0 12px 32px rgba(16,20,24,.07);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0b1016; --bg-2:#10171f; --panel:#131a22; --line:#243040;
    --ink:#eef2f6; --ink-2:#aab4c0; --ink-3:#6c7888; --accent-soft:#0f2e2a;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 32px rgba(0,0,0,.3);
  }
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"IBM Plex Sans Thai",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 24px;border-radius:12px;font-weight:600;background:var(--accent);color:#fff;border:0;cursor:pointer;font:inherit;font-weight:600;transition:filter .15s,transform .15s}
.btn:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn.ghost{background:var(--panel);color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:8px 16px;font-size:14px}

/* nav */
header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo img{width:32px;height:32px;border-radius:9px}
header nav{margin-left:auto;display:flex;gap:22px;align-items:center;font-size:15px;color:var(--ink-2)}
header nav a:hover{color:var(--ink)}

/* hero */
.hero{padding:88px 0 64px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-200px -20% auto;height:560px;background:radial-gradient(ellipse at center,var(--accent-soft),transparent 65%);z-index:-1}
.tag{display:inline-block;padding:6px 14px;border-radius:99px;background:var(--accent-soft);color:var(--accent);font-weight:600;font-size:14px;margin-bottom:20px}
h1{font-size:clamp(38px,6vw,64px);line-height:1.15;letter-spacing:-1px;font-weight:700}
h1 em{font-style:normal;background:linear-gradient(90deg,var(--accent-2),#0b7f8f);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:19px;color:var(--ink-2);max-width:620px;margin:20px auto 32px}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.small{font-size:13.5px;color:var(--ink-3);margin-top:14px}

/* demo */
.demo{margin:56px auto 0;max-width:720px;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);text-align:left;overflow:hidden}
.demo .bar{display:flex;gap:6px;padding:12px 14px;border-bottom:1px solid var(--line)}
.demo .bar i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.demo .body{padding:22px 24px;min-height:120px;font-size:17px}
.demo .caret{display:inline-block;width:2px;height:1.1em;background:var(--accent);vertical-align:-3px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.demo .pill{display:flex;align-items:center;gap:10px;width:max-content;margin:0 auto 18px;background:#0f1720;color:#fff;border-radius:99px;padding:8px 16px 8px 8px;font-size:13px}
.demo .pill .rd{width:26px;height:26px;border-radius:50%;background:#ff4d5e;display:grid;place-items:center}
.wave{display:flex;gap:3px;align-items:center;height:20px}
.wave i{width:3px;border-radius:3px;background:#fff;animation:wv 1s ease-in-out infinite}
@keyframes wv{0%,100%{height:4px}50%{height:18px}}

/* sections */
section{padding:80px 0}
.alt{background:var(--bg-2)}
.eyebrow{color:var(--accent);font-weight:600;font-size:14px;letter-spacing:.3px}
h2{font-size:clamp(28px,4vw,40px);letter-spacing:-.5px;line-height:1.25;margin:6px 0 12px}
.sub{color:var(--ink-2);max-width:620px}
.center{text-align:center}.center .sub{margin:0 auto}
.grid{display:grid;gap:18px;margin-top:40px}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow)}
.card .ic{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:22px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:6px}
.card p{color:var(--ink-2);font-size:15px}
.step{font-weight:700;color:var(--accent);font-size:14px}
.kbd{display:inline-flex;gap:4px}
.kbd span{font-size:13px;font-weight:600;padding:2px 8px;border-radius:7px;background:var(--bg-2);border:1px solid var(--line);border-bottom-width:2px}

/* pricing */
.toggle{display:inline-flex;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:4px;margin-top:24px}
.plans{grid-template-columns:repeat(3,1fr);align-items:stretch}
.plan{display:flex;flex-direction:column;position:relative}
.plan.best{border:2px solid var(--accent)}
.plan .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-size:12.5px;font-weight:700;padding:3px 12px;border-radius:99px}
.plan h3{font-size:20px}
.plan .for{color:var(--ink-2);font-size:14px;min-height:42px}
.price{font-size:40px;font-weight:700;letter-spacing:-1px;margin:14px 0 2px}
.price small{font-size:15px;color:var(--ink-3);font-weight:500;letter-spacing:0}
.plan ul{list-style:none;margin:18px 0 24px;display:flex;flex-direction:column;gap:10px;font-size:15px;flex:1}
.plan li{display:flex;gap:10px}
.plan li::before{content:"✓";color:var(--accent);font-weight:700}
.plan li.no{color:var(--ink-3)}
.plan li.no::before{content:"–";color:var(--ink-3)}
.plan .btn{justify-content:center}

/* compare */
table{width:100%;border-collapse:collapse;margin-top:32px;background:var(--panel);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
th{background:var(--bg-2);font-weight:600}
td:not(:first-child),th:not(:first-child){text-align:center}
tr:last-child td{border-bottom:0}

/* faq */
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between}
summary::after{content:"+";color:var(--ink-3);font-size:20px}
details[open] summary::after{content:"–"}
details p{color:var(--ink-2);margin-top:10px}

.final{text-align:center;background:var(--dark);color:#fff;border-radius:24px;padding:64px 24px}
.final .sub{color:#9fb0c2;margin:0 auto 28px}
footer{padding:32px 0;color:var(--ink-3);font-size:14px}
footer .wrap{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
footer nav{margin-left:auto;display:flex;gap:18px}

.doc{max-width:760px;padding:56px 20px 80px;margin:0 auto}
.doc h1{font-size:36px;margin-bottom:8px}
.doc h2{font-size:22px;margin:28px 0 8px}
.doc p,.doc li{color:var(--ink-2);margin-bottom:8px}
.doc ul{padding-left:22px}

@media (max-width:820px){
  .g3,.plans{grid-template-columns:1fr}
  header nav a:not(.btn){display:none}
  section{padding:60px 0}
  th,td{padding:10px 10px;font-size:14px}
}