:root{--color-bg: #0f172a;--color-surface: #1e293b;--color-text: #f1f5f9;--color-hint: #94a3b8;--color-accent: #2563eb;--color-accent-text: #ffffff;--color-error: #f87171;--color-success: #34d399;--radius: 16px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--color-bg);color:var(--color-text);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}.screen{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;min-height:100%;padding:32px 20px 40px;max-width:420px;margin:0 auto;text-align:center}.product{display:flex;flex-direction:column;align-items:center;gap:10px;width:100%;background:var(--color-surface);border-radius:var(--radius);padding:16px}.product img{width:72px;height:72px;border-radius:14px;object-fit:cover}.product h2{font-size:1.0625rem;font-weight:600}.product p{font-size:.8125rem;color:var(--color-hint)}.amount{font-size:1.75rem;font-weight:700;letter-spacing:-.02em;color:var(--color-text)}.pay{display:flex;align-items:center;justify-content:center;width:100%;padding:14px;border:none;border-radius:999px;background:var(--color-accent);color:var(--color-accent-text);font-size:1rem;font-weight:600;cursor:pointer;transition:opacity .15s}.pay:active{opacity:.8}.pay[disabled]{opacity:.55;cursor:default}.error{color:var(--color-error);font-size:.9375rem}.hint{font-size:.8125rem;color:var(--color-hint)}.history-screen{align-items:stretch;justify-content:flex-start;text-align:left}.history-title{font-size:1.25rem;font-weight:700;text-align:center}.history-list{list-style:none;display:flex;flex-direction:column;gap:10px;width:100%}.history-item{background:var(--color-surface);border-radius:var(--radius);padding:14px 16px;display:flex;flex-direction:column;gap:4px}.history-item__name{font-weight:600;font-size:.9375rem}.history-item .product{background:transparent;padding:0;align-items:flex-start;text-align:left;gap:6px}.history-item__meta{display:flex;justify-content:space-between;align-items:center;gap:8px}.history-item__amount{font-size:.875rem;color:var(--color-hint)}.history-item__status{font-size:.8125rem}.history-item__date{font-size:.75rem}