:root{--background:oklch(98.5% .006 145);--foreground:oklch(24% .035 160);--surface:oklch(99.9% .003 145);--surface-subtle:oklch(96.5% .008 145);--surface-dark:oklch(14.5% .012 160);--surface-dark-raised:oklch(20.5% .015 160);--primary:oklch(28% .055 160);--primary-foreground:oklch(98.5% .006 145);--secondary:oklch(93% .035 105);--secondary-foreground:oklch(24% .035 160);--accent:var(--primary);--accent-strong:var(--secondary);--accent-foreground:var(--primary-foreground);--muted:oklch(50% .025 160);--muted-foreground:var(--muted);--line:oklch(24% .035 160/.14);--border:var(--line);--input:var(--line);--ring:oklch(78% .12 105);--success:oklch(66% .14 155);--success-foreground:oklch(18% .025 160);--warning:oklch(78% .13 82);--warning-foreground:oklch(20% .03 80);--danger:oklch(68% .16 28);--danger-foreground:oklch(18% .025 160);--line-dark:oklch(96% .01 145/.18);--font-sans:"Inter", ui-sans-serif, system-ui, sans-serif;--font-mono:"JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;--dark-canvas:oklch(16% .018 255);--dark-surface:oklch(19.5% .018 255);--dark-elevated:oklch(23.5% .022 255);--dark-border:oklch(72% .025 255/.18);--dark-border-strong:oklch(72% .025 255/.3);--dark-text:oklch(94% .018 255);--dark-text-muted:oklch(72% .025 255);--dark-text-subtle:oklch(58% .025 255);--dark-focus:oklch(82% .12 105);--chart-one:oklch(78% .12 105);--chart-two:oklch(70% .1 190);--test:oklch(78% .13 82);--live:oklch(72% .14 155);--error:oklch(72% .15 28);--radius-sm:.375rem;--radius-md:.5rem;--radius-lg:.75rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;font-family:var(--font-sans);color:var(--foreground);background:var(--background);font-synthesis:none}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,select{font:inherit}:is(button,a,input,select):focus-visible{outline:3px solid var(--ring);outline-offset:3px}.checkout-page{background:var(--background);min-height:100svh;padding:70px 16px 32px;position:relative;overflow:hidden}.checkout-wrap{z-index:1;width:min(100%,620px);margin:0 auto;position:relative}.mode-banner{z-index:3;min-height:38px;color:var(--warning-foreground);background:var(--warning);letter-spacing:.12em;text-align:center;text-transform:uppercase;place-items:center;padding:8px 16px;font-size:.72rem;font-weight:800;display:grid;position:absolute;inset:0 0 auto}.test-watermark{z-index:0;color:var(--line);letter-spacing:.16em;pointer-events:none;-webkit-user-select:none;user-select:none;font-size:clamp(5rem,24vw,14rem);font-weight:900;position:fixed;top:48%;left:50%;transform:translate(-50%,-50%)rotate(-18deg)}.checkout-header{align-items:center;gap:12px;margin-bottom:48px;display:flex}.brand-mark{width:38px;height:38px;color:var(--primary-foreground);background:var(--primary);border-radius:12px;place-items:center;font-weight:850;display:grid}.brand-name{margin:3px 0 0;font-weight:750}.eyebrow{color:var(--muted);letter-spacing:.14em;text-transform:uppercase;margin:0;font-size:.69rem;font-weight:800}.merchant-intro{margin-bottom:22px}.merchant-intro h1{letter-spacing:-.055em;max-width:18ch;margin:10px 0 12px;font-size:clamp(2rem,7vw,3.2rem);line-height:1.04}.merchant-reference{color:var(--muted);margin:0;font-size:.9rem}.merchant-reference strong{color:var(--foreground);font-weight:650}.principal{letter-spacing:-.04em;margin:28px 0 0;font-size:clamp(1.7rem,6vw,2.5rem);font-weight:800}.expiry{color:var(--muted);margin:0 0 24px;font-size:.85rem}.payment-status,.fee-summary,.test-simulator,.channel-picker{border:1px solid var(--border);background:color-mix(in oklch, var(--surface) 94%, var(--surface-subtle));border-radius:18px}.payment-status{align-items:flex-start;gap:14px;margin:20px 0;padding:18px;display:flex}.payment-status h2,.fee-summary h2,.test-simulator h2{letter-spacing:-.02em;margin:0;font-size:1rem}.payment-status p,.test-simulator p{color:var(--muted);margin:6px 0 0;font-size:.88rem;line-height:1.5}.status-mark{width:28px;height:28px;color:var(--primary-foreground);background:var(--primary);border-radius:50%;flex:none;place-items:center;font-weight:800;display:grid}.status-paid{border-color:color-mix(in oklch, var(--success) 42%, var(--border));background:color-mix(in oklch, var(--success) 8%, var(--surface))}.status-paid .status-mark{background:var(--success)}.status-failed,.status-expired,.status-cancelled,.status-provider_unknown{background:color-mix(in oklch, var(--danger) 5%, var(--surface))}.status-failed .status-mark,.status-expired .status-mark,.status-cancelled .status-mark,.status-provider_unknown .status-mark{background:var(--danger)}.channel-picker{margin:20px 0;padding:18px}.channel-picker legend{padding:0 6px;font-weight:750}.channel-grid{gap:10px;margin-top:12px;display:grid}.channel-card{cursor:pointer;border:1px solid var(--border);background:var(--surface);border-radius:13px;align-items:center;gap:12px;min-height:68px;padding:13px;transition:border-color .16s ease-out,background .16s ease-out;display:flex}.channel-card:hover,.channel-card.is-selected{border-color:var(--foreground);background:var(--surface-subtle)}.channel-card input{width:18px;height:18px;accent-color:var(--primary);flex:none}.channel-copy{gap:4px;display:grid}.channel-copy span{color:var(--muted);font-size:.8rem}.channel-check{color:var(--success);margin-left:auto;font-weight:900}.fee-summary{margin:20px 0;padding:20px}.section-heading{margin-bottom:18px}.section-heading h2{margin:6px 0 0;font-size:1.1rem}.fee-lines{margin:0}.fee-lines div{color:var(--muted);justify-content:space-between;gap:16px;padding:8px 0;font-size:.9rem;display:flex}.fee-lines dt,.fee-lines dd{margin:0}.fee-lines dd{color:var(--foreground);text-align:right}.fee-lines .fee-total{border-top:1px solid var(--border);color:var(--foreground);margin-top:8px;padding-top:15px;font-size:1.05rem;font-weight:800}.fee-confirmation{color:var(--foreground);align-items:flex-start;gap:10px;margin-top:18px;font-size:.83rem;line-height:1.45;display:flex}.fee-confirmation input{width:18px;height:18px;accent-color:var(--primary);flex:none;margin:0}.test-simulator{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin:20px 0;padding:18px;display:flex}.test-simulator select{border:1px solid var(--border);max-width:100%;min-height:42px;color:var(--foreground);background:var(--surface);border-radius:9px;padding:8px 30px 8px 10px}.test-simulator p{width:100%}.primary-action{cursor:pointer;width:100%;min-height:50px;color:var(--primary-foreground);background:var(--primary);border:0;border-radius:12px;margin-top:8px;font-weight:800;transition:transform .16s ease-out,opacity .16s ease-out}.primary-action:not(:disabled):hover{transform:translateY(-1px)}.primary-action:disabled{cursor:not-allowed;opacity:.42}.snap-frame{border:1px dashed var(--border);min-height:110px;color:var(--muted);text-align:center;border-radius:14px;place-items:center;margin:20px 0;padding:20px;display:grid}.return-note{color:var(--muted);margin:20px 0;font-size:.82rem;line-height:1.55}.return-link{color:var(--foreground);margin-top:20px;font-size:.85rem;font-weight:750;display:inline-block}.return-link span{color:var(--muted);font-weight:500}footer{color:var(--muted);margin-top:42px;font-size:.72rem;line-height:1.5}.form-error{color:var(--danger-foreground);background:var(--danger);border-radius:10px;padding:12px 14px;font-size:.86rem}.payment-error{padding-top:20vh}.payment-error h1{letter-spacing:-.05em;margin:12px 0;font-size:clamp(2rem,7vw,3rem)}.payment-error p:not(.eyebrow){max-width:38ch;color:var(--muted);line-height:1.6}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (width>=700px){.checkout-page{padding:88px 32px 48px}.checkout-header{margin-bottom:68px}.channel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}