:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--bg-color:#f3f4f6;--card-bg:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#d1d5db;--danger-color:#dc2626;--success-color:#16a34a;--border-radius:8px;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f}[data-theme=dark]{--primary-color:#60a5fa;--primary-hover:#93c5fd;--bg-color:#111827;--card-bg:#1f2937;--text-main:#f3f4f6;--text-muted:#9ca3af;--border-color:#374151;--shadow:0 4px 6px -1px #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;transition:background-color .3s,color .3s}.btn{border-radius:var(--border-radius);cursor:pointer;border:none;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:background-color .2s,opacity .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-danger{background-color:var(--danger-color);color:#fff}.btn-danger:hover{opacity:.9}input,select{background-color:var(--card-bg);color:var(--text-main);border:1px solid var(--border-color);transition:border-color .2s,background-color .3s}input:focus,select:focus{border-color:var(--primary-color);outline:none}.link{color:var(--primary-color);text-decoration:none}.link:hover{text-decoration:underline}.error-alert{color:#b91c1c;border-radius:var(--border-radius);background-color:#fee2e2;border:1px solid #fecaca;margin-bottom:1rem;padding:.75rem;font-size:.9rem}[data-theme=dark] .error-alert{color:#fca5a5;background-color:#dc262633;border-color:#dc262666}.loader-container{background-color:var(--bg-color);justify-content:center;align-items:center;width:100%;height:100vh;display:flex}.spinner{border:4px solid #0000001a;border-left-color:var(--primary-color);border-radius:50%;width:36px;height:36px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}