:root,[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f3f4f6;--bg-tertiary: #e5e7eb;--text-primary: #111827;--text-secondary: #6b7280;--accent: #6b7280;--accent-hover: #4b5563;--border: #d1d5db;--success: #22c55e;--danger: #ef4444;--shadow: rgba(0, 0, 0, .1)}[data-theme=dark]{--bg-primary: #1f2937;--bg-secondary: #111827;--bg-tertiary: #374151;--text-primary: #f9fafb;--text-secondary: #9ca3af;--accent: #9ca3af;--accent-hover: #6b7280;--border: #4b5563;--success: #4ade80;--danger: #f87171;--shadow: rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-secondary);color:var(--text-primary);min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}button{cursor:pointer;border:none;border-radius:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:background-color .2s}.btn-primary{background-color:var(--accent);color:#fff}.btn-primary:hover{background-color:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover{background-color:var(--border)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}input{padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;background-color:var(--bg-primary);color:var(--text-primary);width:100%}input:focus{outline:2px solid var(--accent);outline-offset:-1px}