:root{--font-sans: "Inter", sans-serif;--bg-color: #f8fafc;--surface-color: #ffffff;--text-primary: #0f172a;--text-secondary: #64748b;--border-color: #e2e8f0;--primary-color: #000000;--primary-hover: #333333;--danger-color: #ef4444}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit;width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:6px;outline:none;transition:border-color .2s}input:focus,textarea:focus{border-color:var(--primary-color)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-weight:500;border-radius:6px;transition:all .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000000d}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.glass-header{background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:50}