:root{--color-primary: #4f46e5;--color-primary-dark: #4338ca;--color-success: #16a34a;--color-error: #dc2626;--color-text: #111827;--color-muted: #6b7280;--color-border: #d0d5dd;--color-bg: #f2f4f7;--color-card: #ffffff;--radius: 14px}*{box-sizing:border-box}html,body,#root{height:100%;overflow:hidden}body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--color-bg);color:var(--color-text);-webkit-tap-highlight-color:transparent}.page{height:100vh;display:flex;align-items:center;justify-content:center;padding:12px;overflow-y:auto}.card{background:var(--color-card);padding:14px 18px;border-radius:var(--radius);box-shadow:0 6px 24px #11182714;width:100%;max-width:520px;max-height:calc(100vh - 24px);overflow-y:auto}.card.center{text-align:center}.title{margin:0 0 2px;font-size:clamp(16px,4vw,20px);text-align:center;color:var(--color-primary-dark)}.subtitle{margin:0 0 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img{width:200px;height:200px;max-width:100%;margin-top:8px;border-radius:8px;background:#fff;padding:8px;border:1px solid var(--color-border)}.welcome{margin:0 0 8px;font-size:clamp(20px,6vw,28px);color:var(--color-primary-dark)}.status.valid{color:var(--color-success)}.status.invalid{color:var(--color-error)}.details{margin-top:16px;text-align:left;font-size:14px;background:#f9fafb;border-radius:10px;padding:14px 16px}.details p{margin:6px 0;word-break:break-word}.form-single{grid-template-columns:1fr}@media (max-width: 600px){.form{grid-template-columns:1fr}}@media (max-width: 380px){.card{padding:12px 14px}}.admin-page{height:100vh;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:14px}.admin-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}.admin-title{margin:0;font-size:clamp(18px,4vw,24px);color:var(--color-primary-dark)}.admin-subtitle{margin:4px 0 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