:root{--bg-color: #0f172a;--card-bg: #1e293b;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent: #3b82f6;--accent-hover: #2563eb;--success: #10b981;--error: #ef4444;--border: #334155}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.5}.layout-centered{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:1rem}.card{background-color:var(--card-bg);border-radius:12px;padding:2.5rem;width:100%;max-width:480px;box-shadow:0 10px 25px #0003;border:1px solid var(--border)}.text-center{text-align:center}.title{font-size:2rem;font-weight:700;margin-bottom:.5rem;color:var(--text-primary)}.subtitle{font-size:1rem;color:var(--text-secondary);margin-bottom:2rem}.btn-primary{background-color:var(--text-primary);color:var(--bg-color);border:none;border-radius:6px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;width:100%}.btn-primary:hover{background-color:#e2e8f0;transform:translateY(-1px)}.alert-error{background-color:#ef44441a;border-left:4px solid var(--error);padding:1rem;border-radius:4px;margin-bottom:1.5rem;color:var(--error)}.api-key-container{margin:1.5rem 0}.api-key-panel{margin-top:1.5rem}.api-key-input{width:100%;background-color:#0f172a;border:1px solid var(--border);color:var(--text-primary);padding:.75rem 1rem;border-radius:6px;font-family:monospace;font-size:.875rem;outline:none}.api-key-input:focus{border-color:var(--accent)}.copy-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}.copy-btn{background-color:var(--accent);color:#fff;border:none;border-radius:6px;padding:.75rem 1rem;font-weight:600;cursor:pointer;transition:background-color .2s}.copy-btn:hover{background-color:var(--accent-hover)}.copy-btn.copied{background-color:var(--success)}.instruction-box{background-color:#0f172a;padding:1rem;border-radius:6px;border:1px solid var(--border);margin-top:1.5rem}.instruction-box p{font-size:.875rem;color:var(--text-secondary);margin-bottom:.5rem}.instruction-box code{color:var(--accent);font-family:monospace;background-color:#3b82f61a;padding:.25rem .5rem;border-radius:4px;font-size:.875rem;word-break:break-all;display:inline-block;width:100%}@media (max-width: 520px){.copy-actions{grid-template-columns:1fr}}