:root{--brand-blue: #1a5490;--brand-blue-dark: #123f6b;--bg: #f5f5f5;--panel-bg: #ffffff;--border: #dde1e6;--text: #1f2933;--muted: #6b7280;--danger: #c0392b;--danger-bg: #fdecea;--success: #1f9c5b;--success-bg: #e9f8ef}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:760px;margin:0 auto;padding:32px 20px 60px}.site-header{background:var(--brand-blue);color:#fff;text-align:center;padding:26px 20px 30px}.institution-tag{height:32px;width:auto;opacity:.92;margin-bottom:10px}.site-header h1{color:#fff;margin:0 0 4px;font-size:1.9rem}.site-header p{color:#ffffffd9;margin:0}.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:24px}.tab{border:1px solid var(--border);background:var(--panel-bg);color:var(--brand-blue-dark);padding:10px 20px;border-radius:8px;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .15s,color .15s}.tab:hover{background:#eaeff3}.tab.active{background:var(--brand-blue);color:#fff;border-color:var(--brand-blue)}.panel{background:var(--panel-bg);border:1px solid var(--border);border-radius:12px;padding:28px;box-shadow:0 2px 8px #0f283c0d}.panel h2{margin-top:0;color:var(--brand-blue-dark)}.hint{color:var(--muted);font-size:.92rem;line-height:1.5}.upload-form{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:20px 0}.file-input{flex:1 1 220px}.text-input{flex:1 1 220px;padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:.9rem}.btn-primary{background:var(--brand-blue);color:#fff;border:none;padding:10px 20px;border-radius:8px;font-weight:600;cursor:pointer}.btn-primary:hover:not(:disabled){background:var(--brand-blue-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{display:inline-block;background:#fff;color:var(--brand-blue);border:1px solid var(--brand-blue);padding:8px 16px;border-radius:8px;font-weight:600;text-decoration:none;cursor:pointer;margin-top:14px}.btn-secondary.small{padding:5px 12px;font-size:.85rem;margin-top:0}.alert{margin-top:16px;padding:10px 14px;border-radius:8px;font-size:.9rem}.alert-error{background:var(--danger-bg);color:var(--danger)}.result-card{margin-top:24px;border:1px solid var(--border);border-radius:10px;padding:20px;background:#fafcfe}.result-card.verified{border-color:var(--success);background:var(--success-bg)}.result-card.not-verified{border-color:var(--danger);background:var(--danger-bg)}.result-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}.badge{padding:4px 10px;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.02em}.badge-success{background:var(--success);color:#fff}.badge-danger{background:var(--danger);color:#fff}.code{font-family:Consolas,monospace;color:var(--brand-blue-dark);font-weight:700}dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:0}dt{color:var(--muted);font-size:.85rem;white-space:nowrap}dd{margin:0;word-break:break-all}.hash{font-family:Consolas,monospace;font-size:.85rem;background:#eaeff3;padding:2px 6px;border-radius:4px}.muted{color:var(--muted);font-size:.85rem}.cert-list{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-direction:column;gap:10px}.cert-item{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--border);border-radius:8px;padding:12px 16px}.app-footer{text-align:center;color:var(--muted);font-size:.8rem;margin-top:40px}