:root{--bg: #f5f7fb;--surface: #ffffff;--line: #d0d7e2;--text: #2d2f36;--muted: #5f6c7b;--primary: #4da6ff;--primary-2: #52e0c8;--ok: #1e9b50;--err: #d64545}*{margin:0;padding:0;box-sizing:border-box}ul,ol{list-style:none}button,input[type=button],input[type=submit],input[type=reset]{background:none;border:none;padding:0;margin:0;font:inherit;color:inherit;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none}.primary-btn{background:linear-gradient(90deg,var(--primary),var(--primary-2));color:#fff;border:none;padding:14px;font-weight:700;width:100%;font-size:16px;cursor:pointer;box-shadow:0 8px 18px #0f172a38,0 0 0 1px #ffffff40 inset;transition:transform .2s ease,box-shadow .2s ease,opacity .2s ease;border-radius:14px}.primary-btn:hover{box-shadow:0 12px 24px #0f172a4d,0 0 0 1px #ffffff40 inset}.primary-btn:disabled{opacity:.6;cursor:not-allowed}