/* SimPickup — trang giới thiệu dịch vụ. Không khung, không build, không phụ thuộc.
   Một trang tiếp thị mà phải cài 300MB thư viện mới sửa được một dòng chữ là
   trang sẽ không bao giờ được sửa. */
:root{
  --bg:#0b0d10; --bg2:#111419; --card:#151922; --line:#232835;
  --fg:#e8ecf2; --muted:#9aa4b2; --acc:#ff7a45; --acc2:#ffb259;
  --ok:#5cd18a; --r:16px; --r-sm:10px;
  --mw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--fg);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--mw);margin:0 auto;padding:0 20px}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

header{position:sticky;top:0;z-index:10;background:rgba(11,13,16,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .in{display:flex;align-items:center;gap:14px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:650;font-size:18px;color:var(--fg)}
.logo:hover{text-decoration:none}
.dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--acc),var(--acc2))}
.spacer{flex:1}
nav a{color:var(--muted);font-size:14.5px;margin-left:20px}
nav a:hover{color:var(--fg);text-decoration:none}
.btn{display:inline-block;padding:11px 20px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer}
.btn.primary{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#1a1005}
.btn.primary:hover{text-decoration:none;filter:brightness(1.06)}
.btn.ghost{border-color:var(--line);color:var(--fg)}
.btn.ghost:hover{text-decoration:none;border-color:var(--muted)}

section{padding:76px 0}
section.alt{background:var(--bg2)}
h1{font-size:clamp(30px,5.2vw,50px);line-height:1.15;letter-spacing:-.02em;font-weight:700}
h2{font-size:clamp(23px,3.4vw,33px);line-height:1.25;letter-spacing:-.01em;margin-bottom:14px;font-weight:650}
h3{font-size:18px;margin-bottom:8px;font-weight:620}
.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);margin-top:18px;max-width:640px}
.eyebrow{color:var(--acc);font-weight:620;font-size:13.5px;letter-spacing:.09em;text-transform:uppercase;margin-bottom:14px}
.sub{color:var(--muted);max-width:660px;margin-bottom:34px}

.hero{padding:86px 0 70px}
.hero .cta{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}
.hero .note{margin-top:22px;color:var(--muted);font-size:14.5px}

.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(252px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.card p{color:var(--muted);font-size:15px}
.card .ic{font-size:22px;margin-bottom:12px;display:block}

.vow{background:linear-gradient(135deg,rgba(255,122,69,.09),rgba(255,178,89,.05));border:1px solid rgba(255,122,69,.3);border-radius:var(--r);padding:30px}
.vow h2{margin-bottom:10px}
.vow p{color:var(--fg);opacity:.9;max-width:720px}

.steps{counter-reset:s}
.step{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.step:last-child{border-bottom:0}
.step .n{flex:0 0 38px;height:38px;border-radius:50%;background:var(--card);border:1px solid var(--line);
  display:grid;place-items:center;font-weight:680;color:var(--acc)}
.step p{color:var(--muted);font-size:15px}

table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:13.5px;letter-spacing:.04em;text-transform:uppercase}
td.y{color:var(--ok)}

pre{background:#0a0c0f;border:1px solid var(--line);border-radius:var(--r-sm);padding:16px;overflow-x:auto;
  font-size:13px;line-height:1.65;color:#cbd4e1}
pre .k{color:var(--acc2)}

details{border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 18px;margin-bottom:10px;background:var(--card)}
details summary{cursor:pointer;font-weight:600;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::before{content:"+";color:var(--acc);font-weight:700;margin-right:10px}
details[open] summary::before{content:"−"}
details p{color:var(--muted);margin-top:12px;font-size:15px}

footer{border-top:1px solid var(--line);padding:40px 0;color:var(--muted);font-size:14px}
footer .in{display:flex;gap:16px;flex-wrap:wrap;align-items:center}

@media (max-width:720px){
  section{padding:56px 0}
  nav a{display:none}
  .hero{padding:58px 0 46px}
}