:root{
  --primary:#0F172A; --secondary:#10B981; --secondary-dark:#0e9f74;
  --tertiary:#3B82F6; --neutral:#787778;
  --amber-bg:#FEF3C7; --amber-text:#92610a;
  --bg:#EEF0F3; --surface:#FFFFFF; --line:#E6E8EC; --text-soft:#6B7280;
  --font-head:'Hanken Grotesk',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font-body);background:var(--bg);color:var(--primary);
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px 16px;-webkit-font-smoothing:antialiased;}
.phone{width:100%;max-width:400px;background:var(--surface);border-radius:26px;
  box-shadow:0 24px 60px -20px rgba(15,23,42,.35);overflow:hidden;position:relative;
  display:flex;flex-direction:column;min-height:720px;}
.app-header{display:flex;align-items:center;justify-content:space-between;
  padding:18px 20px 14px;border-bottom:1px solid var(--line);}
.brand{display:flex;align-items:center;gap:9px}
.brand-mark{width:26px;height:26px;border-radius:8px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;position:relative;}
.brand-mark::after{content:"";width:8px;height:8px;border-radius:2px;background:var(--secondary);
  box-shadow:5px -5px 0 -1px var(--tertiary);}
.brand-name{font-family:var(--font-head);font-weight:800;font-size:16px;letter-spacing:-.3px}
.brand-name b{color:var(--secondary)}
.icon-btn{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);display:flex;align-items:center;justify-content:center;
  cursor:pointer;color:var(--neutral);}
.app-body{padding:16px 20px 20px;flex:1;overflow-y:auto}
.rate-lock{display:flex;align-items:center;justify-content:space-between;
  background:var(--amber-bg);color:var(--amber-text);border-radius:12px;
  padding:11px 14px;margin-bottom:16px;font-size:13px;font-weight:600;}
.rate-lock .left{display:flex;align-items:center;gap:7px}
.rate-lock .time{font-family:var(--font-mono);font-weight:600;font-size:13px}
.rate-lock.expired{background:#FEE2E2;color:#b42318;cursor:pointer}
.rate-lock .relock{font-family:var(--font-body);text-decoration:underline}
.field{border:1px solid var(--line);border-radius:14px;padding:13px 16px;background:var(--surface);position:relative}
.field-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.field-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.10em;
  text-transform:uppercase;color:var(--text-soft);font-weight:500;}
.cur-select{display:flex;align-items:center;gap:6px;cursor:pointer;position:relative;
  font-family:var(--font-mono);font-weight:600;font-size:12.5px;color:var(--primary);
  background:#F3F5F8;border-radius:8px;padding:4px 9px;user-select:none;}
.cur-select svg{opacity:.5}
.cur-menu{position:absolute;top:120%;right:0;background:var(--surface);
  border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 28px -8px rgba(15,23,42,.25);
  padding:5px;z-index:12;display:none;min-width:150px;}
.cur-menu.open{display:block}
.cur-item{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:7px;cursor:pointer;
  font-family:var(--font-body);font-weight:500;font-size:13px;color:var(--primary);}
.cur-item:hover{background:#F3F5F8}
.cur-item .code{font-family:var(--font-mono);font-weight:600;font-size:12px;width:34px}
.cur-item .nm{color:var(--text-soft);font-size:12px}
.cur-item.disabled{opacity:.35;pointer-events:none}
.amount-row{display:flex;align-items:baseline;gap:8px}
.amount-cur{font-family:var(--font-mono);font-size:19px;color:var(--neutral);font-weight:500;min-width:22px}
.amount-input{border:none;outline:none;width:100%;background:transparent;
  font-family:var(--font-mono);font-weight:600;font-size:26px;color:var(--primary);letter-spacing:-.5px;}
.amount-input.readonly{color:var(--secondary-dark)}
.swap-wrap{display:flex;justify-content:center;height:0;position:relative;z-index:2;margin:8px 0}
.swap-btn{width:38px;height:38px;border-radius:11px;margin-top:-6px;background:var(--primary);
  color:#fff;border:3px solid var(--surface);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:transform .25s ease;}
.swap-btn:active{transform:rotate(180deg)}
.rate-detail{margin-top:16px;border:1px solid var(--line);border-radius:14px;overflow:hidden;}
.rate-line{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;font-size:13px;}
.rate-line + .rate-line{border-top:1px solid var(--line)}
.rate-line .k{color:var(--text-soft);font-weight:500}
.rate-line .v{font-family:var(--font-mono);font-weight:600;font-size:13px}
.rate-line .v.free{color:var(--secondary)}
.rate-src{font-size:10.5px;color:var(--text-soft);padding:0 16px 11px;margin-top:-4px}
.cta{width:100%;margin-top:18px;border:none;cursor:pointer;background:var(--secondary);color:#fff;
  font-family:var(--font-head);font-weight:700;font-size:15px;padding:15px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;gap:9px;transition:background .15s ease;}
.cta:hover{background:var(--secondary-dark)}
.cta:disabled{background:#cbd5e1;cursor:progress}
.quota{text-align:center;margin-top:11px;font-size:12px;color:var(--text-soft);}
.quota b{font-family:var(--font-mono);color:var(--primary)}
.ref-note{margin-top:14px;font-size:11px;line-height:1.5;color:var(--text-soft);text-align:center;}
.disclaimer-full{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);}
.disclaimer-full .foot-links{text-align:center;font-size:11px}
.disclaimer-full .foot-links a{color:var(--tertiary);text-decoration:none;font-weight:500;cursor:pointer}
.tabbar{display:flex;border-top:1px solid var(--line);background:var(--surface);}
.tab{flex:1;padding:11px 0 13px;display:flex;flex-direction:column;align-items:center;gap:4px;
  cursor:pointer;color:var(--neutral);font-size:10.5px;font-weight:500;}
.tab.active{color:var(--secondary)}
.tab .pill{width:38px;height:26px;border-radius:9px;display:flex;align-items:center;justify-content:center;}
.tab.active .pill{background:#D1FAE5}
.overlay{position:absolute;inset:0;background:rgba(15,23,42,.55);display:none;align-items:center;
  justify-content:center;padding:22px;z-index:20;backdrop-filter:blur(2px);}
.overlay.show{display:flex}
.modal{background:var(--surface);border-radius:18px;width:100%;padding:26px 22px 22px;
  border-top:4px solid var(--secondary);text-align:center;position:relative;animation:pop .2s ease;}
@keyframes pop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
.lock-badge{width:56px;height:56px;border-radius:16px;background:#FEE2E2;color:#dc2626;
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;}
.modal h3{font-family:var(--font-head);font-weight:800;font-size:19px;margin-bottom:8px}
.modal p{font-size:13px;color:var(--text-soft);line-height:1.55;margin-bottom:16px}
.modal input{width:100%;border:1px solid var(--line);border-radius:11px;padding:12px 14px;
  font-family:var(--font-body);font-size:14px;outline:none;margin-bottom:8px;}
.modal input:focus{border-color:var(--secondary)}
.input-error{color:#dc2626;font-size:12px;margin-bottom:8px;text-align:left}
.modal .secure{font-size:11px;color:var(--text-soft);margin-bottom:16px;display:flex;
  align-items:center;justify-content:center;gap:5px}
.modal .cta{margin-top:0}
.modal.terms-modal{text-align:left;border-top-color:var(--primary)}
.modal.terms-modal h3{text-align:center;margin-bottom:14px}
.terms-body{font-size:11.5px;line-height:1.6;color:#475569;max-height:340px;overflow-y:auto;padding-right:6px}
.terms-body p{font-size:11.5px;color:#475569;margin-bottom:10px}
.terms-body strong{color:var(--primary)}
.close-x{position:absolute;top:14px;right:16px;cursor:pointer;color:var(--neutral);font-size:20px;z-index:21;line-height:1}
.toast{position:absolute;bottom:78px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--primary);color:#fff;font-size:12.5px;font-weight:500;padding:9px 16px;
  border-radius:10px;opacity:0;transition:all .25s ease;pointer-events:none;z-index:15;text-align:center;max-width:80%;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media (max-width:420px){
  body{padding:0}
  .phone{max-width:none;min-height:100vh;border-radius:0;box-shadow:none}
}