@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg:#f3f4f6;--surface:#fff;--text:#1f2937;--text-muted:#6b7280;--border:#e5e7eb;--success:#10b981;--error:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,sans-serif}.container{max-width:600px;margin:2rem auto;padding:0 1rem}.card{background:var(--surface);border-radius:12px;padding:2rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}h1{text-align:center;color:var(--text);margin-bottom:1.5rem;font-size:1.5rem;font-weight:600}.form-group{margin-bottom:1.25rem}label{color:var(--text);margin-bottom:.5rem;font-size:.875rem;font-weight:500;display:block}input[type=text],input[type=url]{border:1px solid var(--border);border-radius:8px;outline:none;width:100%;padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .2s}input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;width:100%;padding:.875rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:500;transition:background-color .2s;display:inline-flex}.btn:hover{background:var(--primary-hover)}.btn:disabled{opacity:.7;cursor:not-allowed}.alert{border-radius:8px;align-items:center;gap:.5rem;margin-bottom:1.5rem;padding:1rem;font-size:.875rem;display:flex}.alert-success{color:var(--success);background-color:#10b9811a;border:1px solid #10b98133}.alert-error{color:var(--error);background-color:#ef44441a;border:1px solid #ef444433}.viewer-container{flex-direction:column;width:100vw;height:100vh;display:flex}.viewer-iframe{border:none;flex:1;width:100%}.viewer-error{height:100vh;color:var(--error);justify-content:center;align-items:center;font-weight:500;display:flex}@media (width<=640px){.container{margin:1rem auto}.card{padding:1.5rem}}