:root{
  --ink:#161823;
  --ink-2:#5a5b61;
  --ink-3:#8a8b91;
  --line:#ededed;
  --gap:#f4f4f5;
  --bg:#ffffff;
  --brand:#0A0A0A;
  --brand-accent:#FF0000;
  --green:#FF0000;
  --green-soft:#ffe5e5;
  --red:#FF0000;
  --gold:#FF0000;
  --link:#FF0000;
  --teal:#E60012;
  --radius:12px;
  --maxw:480px;
  --pad:16px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:#e9e9ec;
  font-size:15px;
  line-height:1.4;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:inherit;}

.phone{
  position:relative;width:100%;max-width:var(--maxw);margin:0 auto;
  min-height:100vh;min-height:100dvh;background:var(--bg);
  box-shadow:0 0 40px rgba(0,0,0,.08);
}

.app-header{position:sticky;top:0;z-index:30;background:#fff;display:flex;align-items:center;gap:12px;padding:8px var(--pad);}
.app-header .icon-btn{width:30px;height:30px;display:grid;place-items:center;color:var(--ink);}
.app-header .icon-btn svg{width:24px;height:24px;}
.app-header.center{justify-content:center;position:relative;display:block;text-align:center;padding-top:10px;}
.app-header.center .back{position:absolute;left:10px;top:6px;}
.app-header.center .ttl{font-size:18px;font-weight:700;}
.app-header.center .secure{display:flex;align-items:center;justify-content:center;gap:5px;color:var(--green);font-size:12.5px;font-weight:500;margin-top:3px;}
.app-header.center .secure svg{width:14px;height:14px;}

.divider{height:8px;background:var(--gap);}

.co-section{padding:16px var(--pad);background:#fff;}
.co-section h3{font-size:17px;font-weight:700;margin:0 0 12px;}
.co-head{display:flex;align-items:center;justify-content:space-between;margin:0 0 12px;}
.co-head h3{margin:0;}

.addr-field{position:relative;padding:14px 0;border-bottom:1px solid #ececee;}
.addr-field > .lab{display:block;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:9px;}
.addr-field input,.addr-field select{
  width:100%;border:none;outline:none;background:transparent;
  font-size:16px;color:var(--ink);padding:2px 0;
}
.addr-field input::placeholder{color:#b9babf;font-weight:400;}
.addr-2col{display:flex;gap:26px;}
.addr-2col .addr-field{flex:1;border-bottom:1px solid #ececee;}
.addr-field.error,.addr-2col .addr-field.error{border-bottom-color:var(--red);}
.field-err{margin-top:6px;font-size:12.5px;font-weight:600;color:var(--red);}
.addr-field.sel{position:relative;}
.addr-field.sel select{-webkit-appearance:none;appearance:none;color:#b9babf;font-size:16px;padding-right:22px;}
.addr-field.sel select.filled{color:var(--ink);}
.addr-field.sel::after{content:"";position:absolute;right:0;bottom:18px;width:9px;height:9px;border-right:2px solid #9a9ba1;border-bottom:2px solid #9a9ba1;transform:rotate(45deg);}
.addr-toggle{display:flex;align-items:center;padding:18px 0 4px;}
.addr-toggle .lab{font-size:15px;font-weight:700;flex:1;}
.switch{position:relative;display:inline-block;width:46px;height:26px;flex:0 0 auto;cursor:pointer;}
.switch input{position:absolute;opacity:0;width:0;height:0;}
.switch .track{position:absolute;inset:0;background:#d9d9de;border-radius:20px;transition:.2s;}
.switch .knob{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.25);}
.switch input:checked ~ .track{background:var(--green);}
.switch input:checked ~ .knob{transform:translateX(20px);}

.merchant{display:flex;align-items:center;gap:8px;margin-bottom:12px;}
.merchant .big-av{width:24px;height:24px;border-radius:50%;background:var(--green);flex:0 0 auto;}
.merchant .nm{font-weight:700;font-size:15px;}
.line-item{display:flex;gap:12px;}
.line-item .thumb{width:72px;height:72px;border-radius:10px;object-fit:cover;flex:0 0 auto;background:#f0f0f0;}
.line-item .li-main{flex:1;min-width:0;}
.line-item .li-name{font-size:14px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.line-item .li-variant{color:var(--ink-3);font-size:13px;margin-top:4px;}
.li-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:8px;}
.li-price{font-weight:800;}
.li-price s{color:var(--ink-3);font-weight:500;margin-left:6px;font-size:13px;}
.stepper{display:flex;align-items:center;border:1px solid #e3e3e6;border-radius:8px;overflow:hidden;}
.stepper button{width:32px;height:30px;font-size:18px;color:var(--ink);background:#fafafa;}
.stepper .qv{width:38px;text-align:center;font-weight:600;border-left:1px solid #e3e3e6;border-right:1px solid #e3e3e6;line-height:30px;}
.stepper button.is-off{color:#cdced3;cursor:not-allowed;background:#f6f6f7;}
.qty-note{display:none;margin-top:8px;font-size:12.5px;font-weight:600;color:var(--red);}
.qty-note.show{display:block;}
.ship-line{margin-top:14px;font-size:14px;}
.muted{color:var(--ink-2);}
.lead{font-weight:600;}
.teal{color:var(--teal);font-weight:600;}

.sum-row{display:flex;justify-content:space-between;align-items:center;padding:7px 0;font-size:15px;}
.sum-row.deal{font-weight:600;}
.sum-total{display:flex;justify-content:space-between;padding-top:12px;margin-top:6px;border-top:1px solid var(--line);font-weight:800;font-size:17px;}
.policy{padding:16px;background:var(--gap);color:var(--ink-3);font-size:12px;line-height:1.6;}
.policy b{color:var(--ink-2);}

.bottom-bar{position:sticky;bottom:0;width:100%;background:#fff;border-top:1px solid var(--line);display:flex;gap:10px;align-items:center;z-index:40;padding:10px 14px calc(14px + env(safe-area-inset-bottom,0px));}
.bottom-bar.checkout{justify-content:space-between;gap:14px;}
.bb-total{flex:0 0 auto;}
.bb-total .lab{font-size:12px;color:var(--ink-2);}
.bb-total .val{font-size:20px;font-weight:800;}
.btn-place{flex:1;background:#FF0000;color:#fff;border-radius:8px;font-weight:700;font-size:16px;padding:14px;}
.btn-place:active{filter:brightness(.95);}

.ck-transfer-info{display:flex;align-items:flex-start;gap:10px;background:#fff5f5;border:1px solid rgba(255,0,0,0.15);border-radius:12px;padding:12px;font-size:12px;color:var(--ink);line-height:1.5;}
.ck-transfer-info svg{flex-shrink:0;margin-top:2px;}
.ck-btn{width:100%;padding:14px;border:none;border-radius:8px;font-size:16px;font-weight:700;color:#fff;background:#FF0000;cursor:pointer;transition:background 0.2s,transform 0.1s;display:flex;align-items:center;justify-content:center;gap:8px;margin-top:14px;}
.ck-btn:hover{filter:brightness(.95);}
.ck-btn:active{transform:scale(0.98);}
.ck-btn:disabled{opacity:0.6;cursor:not-allowed;}
.ck-btn .spin{width:16px;height:16px;border:3px solid rgba(255,215,0,0.3);border-top-color:var(--brand-accent);border-radius:50%;animation:ckSpin 0.7s linear infinite;}
@keyframes ckSpin{to{transform:rotate(360deg);}}

@media(min-width:600px){:root{--maxw:560px;} body{font-size:16px;}}
@media(min-width:840px){:root{--maxw:620px;} .phone{box-shadow:0 16px 60px rgba(0,0,0,.16);}}