:root{--primary: #7C3AED;--accent: #F59E0B;--bg: #ffffff;--surface: #f9fafb;--border: #e5e7eb;--text: #111827;--text-secondary: #6b7280;--error: #ef4444;--success: #10b981}@media (prefers-color-scheme: dark){:root{--bg: #111827;--surface: #1f2937;--border: #374151;--text: #f9fafb;--text-secondary: #9ca3af}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}#root{min-height:100vh;display:flex;flex-direction:column}button{font-family:inherit;font-size:1rem;cursor:pointer;border:none;background:none;padding:0}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{font-family:inherit;font-size:1rem}.app-header{background:var(--surface);border-bottom:1px solid var(--border);padding:0 1rem}.app-header nav{display:flex;gap:.5rem;max-width:1200px;margin:0 auto}.nav-button{padding:1rem 1.5rem;color:var(--text-secondary);transition:color .2s,border-color .2s;border-bottom:2px solid transparent;font-weight:500}.nav-button:hover{color:var(--text)}.nav-button.active{color:var(--primary);border-bottom-color:var(--primary)}.screen-container{flex:1;padding:2rem 1rem;max-width:1200px;margin:0 auto;width:100%}.screen-title{font-size:2rem;font-weight:700;margin-bottom:2rem;color:var(--text)}.form-group{margin-bottom:1.5rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text)}.form-input,.form-select{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:.5rem;background:var(--bg);color:var(--text);transition:border-color .2s}.form-input:focus,.form-select:focus{outline:none;border-color:var(--primary)}.btn{padding:.75rem 1.5rem;border-radius:.5rem;font-weight:500;transition:all .2s;display:inline-flex;align-items:center;gap:.5rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:#6d28d9}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover:not(:disabled){background:#d97706}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--border)}.status-message{padding:.75rem 1rem;border-radius:.5rem;margin-bottom:1rem}.status-success{background:rgba(16,185,129,.1);color:var(--success);border:1px solid var(--success)}.status-error{background:rgba(239,68,68,.1);color:var(--error);border:1px solid var(--error)}.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-secondary)}.empty-state-icon{font-size:3rem;margin-bottom:1rem}.empty-state-message{font-size:1.125rem;margin-bottom:.5rem}@media (max-width: 640px){.screen-container{padding:1rem}.screen-title{font-size:1.5rem}}