:root{--bg-app: #f1f5f9;--bg-surface: #ffffff;--bg-surface-hover: #f8fafc;--border-color: #e2e8f0;--border-focus: #cbd5e1;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--text-on-brand: #ffffff;--brand-primary: #6366f1;--brand-hover: #4f46e5;--brand-surface: #e0e7ff;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: 1rem;--font-family: "Inter", system-ui, -apple-system, sans-serif}[data-theme=dark]{--bg-app: #0f172a;--bg-surface: #1e293b;--bg-surface-hover: #334155;--border-color: #334155;--border-focus: #475569;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #64748b;--brand-primary: #818cf8;--brand-hover: #a5b4fc;--brand-surface: rgba(99, 102, 241, .15);--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4)}html,body{height:100%;margin:0;font-family:var(--font-family);background-color:var(--bg-app);color:var(--text-primary);transition:background-color .3s ease,color .3s ease;overflow-x:hidden}*{box-sizing:border-box}h1,h2,h3,h4{margin-top:0;color:var(--text-primary);font-weight:700;letter-spacing:-.025em}button{cursor:pointer;border:none;font-family:inherit}.container{width:100%;max-width:600px;margin:0 auto;padding:1rem;display:flex;flex-direction:column;flex:1}.card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:1.5rem;transition:transform .2s,box-shadow .2s}.text-center{text-align:center}.full-width{width:100%}.mt-4{margin-top:1.5rem}.mb-4{margin-bottom:1.5rem}.btn-primary{background-color:var(--brand-primary);color:var(--text-on-brand);padding:.875rem 1.5rem;font-size:1rem;font-weight:600;border-radius:var(--radius-md);box-shadow:var(--shadow-md);transition:all .2s}.btn-primary:hover:not(:disabled){background-color:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-primary:disabled{background-color:var(--border-color);color:var(--text-muted);cursor:not-allowed;box-shadow:none}.btn-secondary{background-color:transparent;border:1px solid var(--border-color);color:var(--text-primary);padding:.75rem 1.25rem;font-size:1rem;font-weight:500;border-radius:var(--radius-md);transition:all .2s}.btn-secondary:hover{border-color:var(--brand-primary);color:var(--brand-primary);background-color:var(--bg-surface-hover)}.btn-icon{background:transparent;color:var(--text-secondary);padding:.5rem;border-radius:var(--radius-md);font-size:1.25rem}.btn-icon:hover{background-color:var(--bg-surface-hover);color:var(--text-primary)}