:root{--color-bg:#f8fafc;--color-surface:#ffffff;--color-text:#0f172a;--color-text-muted:#475569;--color-border:#e2e8f0;--color-primary:#7c3aed;--color-primary-hover:#6d28d9;--color-warning-bg:#fef3c7;--color-warning-text:#92400e;--color-error-bg:#fee2e2;--color-error-text:#991b1b;--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--container-max:28rem;--section-padding-y:2rem;--radius:0.75rem}*,:after,:before{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}.container{width:min(100% - 2rem,var(--container-max));margin-inline:auto}.section{padding-block:var(--section-padding-y);flex:1 1}.site-header{border-bottom:1px solid var(--color-border);background:var(--color-surface)}.site-header-inner{display:flex;align-items:center;justify-content:space-between;padding-block:.75rem}.site-brand{font-weight:700}.site-tag{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--color-text-muted)}.page-header h1{margin:.25rem 0 .5rem;font-size:1.5rem}.page-header p{margin:0;color:var(--color-text-muted)}.eyebrow{margin:0;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--color-primary)}.checkout-container{max-width:var(--container-max)}.alert{padding:.75rem 1rem;border-radius:var(--radius);font-size:.875rem;margin:0 0 1rem}.alert-warning{background:var(--color-warning-bg);color:var(--color-warning-text)}.alert-error{background:var(--color-error-bg);color:var(--color-error-text)}.checkout-meta{margin:0 0 1.25rem;padding:1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius)}.checkout-meta div+div{margin-top:.75rem}.checkout-meta dt{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--color-text-muted)}.checkout-meta dd{margin:.25rem 0 0}.checkout-meta code{font-size:.875rem;word-break:break-all}.checkout-actions{display:flex;flex-direction:column;gap:.75rem}.checkout-hint{margin-top:1rem;font-size:.875rem;color:var(--color-text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;padding:.625rem 1.25rem;border-radius:var(--radius);font-weight:600;font-size:.9375rem;border:none;cursor:pointer;text-decoration:none}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-block{width:100%}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-ghost{background:transparent;color:var(--color-text-muted);border:1px solid transparent}.btn-ghost:hover:not(:disabled){color:var(--color-text);border-color:var(--color-border)}