:root{
  --bg:#080b0a;--surface:#101713;--line:rgba(191,255,226,.09);--text:#f7fbf8;--muted:#9eaca3;
  --green:#18d88f;--green2:#6df5bf;--amber:#f0b44d;--amber2:#ffd27b;--red:#ff7268;
}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 10% 0%,rgba(24,216,143,.08),transparent 28%),radial-gradient(circle at 90% 4%,rgba(240,180,77,.06),transparent 26%),var(--bg);color:var(--text);font-family:Inter,"Noto Sans Thai",sans-serif;line-height:1.6}
a{text-decoration:none;color:inherit}button,input{font:inherit}.container{width:min(1180px,calc(100% - 36px));margin:auto}.grain{position:fixed;inset:0;pointer-events:none;opacity:.018}
.header{position:sticky;top:0;z-index:20;background:rgba(8,11,10,.87);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:78px;display:flex;align-items:center;gap:30px}.brand{display:flex;gap:10px;align-items:center;font-weight:800;letter-spacing:.11em}.brand-symbol{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--green),#57dcff);color:#02100a}.nav-links{display:flex;gap:24px;margin-left:auto}.nav-links a{color:var(--muted)}
.checkout{padding:64px 0 100px}.checkout-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}.eyebrow{color:var(--green2);font-size:11px;font-weight:800;letter-spacing:.16em}.checkout-head h1{font-size:clamp(42px,6vw,68px);letter-spacing:-.05em;margin:9px 0}.checkout-head p{color:var(--muted);max-width:730px}.api-status{display:flex;align-items:center;gap:9px;padding:12px 14px;border:1px solid var(--line);border-radius:13px;background:rgba(255,255,255,.018);color:var(--muted);font-size:13px}.api-status i{width:9px;height:9px;border-radius:50%;background:var(--amber)}.api-status.online i{background:var(--green)}.api-status.error i{background:var(--red)}
.checkout-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px}.form-panel,.summary-sticky{padding:30px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,rgba(17,24,21,.97),rgba(8,11,10,.97))}.section-title{display:flex;gap:14px;align-items:center;margin:8px 0 22px}.section-title>span{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:rgba(24,216,143,.08);color:var(--green2);font-weight:800}.section-title small{color:var(--muted)}.section-title h2{margin:2px 0;font-size:25px}
.product-options,.payment-options{display:grid;gap:12px;margin-bottom:34px}.product-option,.payment-option{display:grid;grid-template-columns:auto auto 1fr auto;gap:14px;align-items:center;padding:17px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.015);cursor:pointer}.payment-option{grid-template-columns:auto 1fr}.product-option.selected,.payment-option.selected{border-color:rgba(109,245,191,.28);background:rgba(24,216,143,.035)}.product-option input,.payment-option input{accent-color:var(--green)}.product-icon{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-weight:800}.green-icon{background:rgba(24,216,143,.08);color:var(--green2)}.amber-icon{background:rgba(240,180,77,.08);color:var(--amber2)}.product-option small{display:block;color:var(--muted)}.product-option strong{display:block;font-size:18px}.product-option p{margin:3px 0 0;color:var(--muted);font-size:12px}.price{font-size:20px;font-weight:800}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-bottom:34px}.form-grid label span{display:block;color:var(--muted);font-size:12px;margin-bottom:7px}.form-grid input{width:100%;height:52px;border-radius:13px;border:1px solid var(--line);background:#0b100d;color:#fff;padding:0 14px;outline:none}.form-grid input:focus{border-color:rgba(109,245,191,.34);box-shadow:0 0 0 3px rgba(24,216,143,.06)}.full{grid-column:1/-1}.agree{display:flex;gap:10px;align-items:flex-start;margin:20px 0;color:var(--muted);font-size:13px}.agree input{margin-top:5px;accent-color:var(--green)}
.button{border:1px solid transparent;border-radius:14px;min-height:46px;padding:0 20px;font-weight:800;cursor:pointer}.button:disabled{opacity:.55;cursor:not-allowed}.button-large{min-height:56px;width:100%}.button-primary{background:linear-gradient(180deg,var(--green2),var(--green));color:#03100a}.form-error{min-height:24px;color:var(--red);font-size:13px;margin:12px 0 0}
.summary-sticky{position:sticky;top:98px}.summary-sticky h2{font-size:30px;margin:8px 0 24px}.summary-product{display:flex;gap:14px;align-items:center;padding:16px;border:1px solid var(--line);border-radius:15px}.summary-product small{display:block;color:var(--muted)}.summary-rows{margin:20px 0}.summary-rows div{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line)}.summary-rows span{color:var(--muted)}.total{display:flex;justify-content:space-between;align-items:center;padding:18px 0}.total strong{font-size:28px;color:var(--green2)}.secure-note{display:flex;gap:10px;padding:14px;border-radius:13px;background:rgba(24,216,143,.05);color:var(--muted);font-size:12px}.secure-note p{margin:0}
.modal{position:fixed;inset:0;display:grid;place-items:center;padding:20px;background:rgba(0,0,0,.75);backdrop-filter:blur(8px);opacity:0;pointer-events:none;transition:.25s;z-index:50}.modal.open{opacity:1;pointer-events:auto}.modal-card{position:relative;width:min(620px,100%);max-height:90vh;overflow:auto;padding:32px;border:1px solid var(--line);border-radius:22px;background:#101713}.modal-card h2{font-size:34px;margin:8px 0 18px}.success-mark{width:62px;height:62px;display:grid;place-items:center;border-radius:50%;background:rgba(24,216,143,.1);color:var(--green2);font-size:32px;font-weight:800;margin-bottom:18px}.order-number{padding:16px;border:1px solid rgba(109,245,191,.2);border-radius:14px;background:rgba(24,216,143,.04)}.order-number span{display:block;color:var(--muted);font-size:11px}.order-number strong{font-size:25px}.modal-summary{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:20px 0;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}.modal-summary div{padding:14px;background:var(--bg)}.modal-summary span{display:block;color:var(--muted);font-size:11px}.next-step{margin:18px 0;color:var(--muted)}.next-step p{margin:5px 0}
.footer{border-top:1px solid var(--line);padding:24px 0;color:#6f7c73}.footer-inner{display:flex;justify-content:space-between}
@media(max-width:900px){.nav-links{display:none}.checkout-grid{grid-template-columns:1fr}.summary-sticky{position:static}.checkout-head{align-items:flex-start;flex-direction:column}}
@media(max-width:650px){.container{width:min(100% - 26px,1180px)}.form-grid,.modal-summary{grid-template-columns:1fr}.product-option{grid-template-columns:auto auto 1fr}.price{grid-column:3}.checkout{padding-top:38px}.footer-inner{flex-direction:column;gap:6px}}