:root{color-scheme:light;--bg:#eef5ff;--panel:#fff;--ink:#172b4d;--muted:#7083a2;--line:#d7e4f7;--accent:#2f6edb;--soft:#e9f1ff;--danger:#c44848}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 15% 0,#dbeaff 0,transparent 34%),var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;min-height:100vh}button,input{font:inherit}button{cursor:pointer}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(400px,100%);background:#ffffffd9;border:1px solid #fff;border-radius:24px;padding:42px;box-shadow:0 24px 70px #355f9f1f;backdrop-filter:blur(20px)}.mark,.brand-mark{display:grid;place-items:center;width:54px;height:54px;background:var(--accent);color:white;border-radius:16px;font-size:28px;font-weight:700;position:relative}.mark span,.brand-mark span{position:absolute;right:6px;top:5px;font-size:9px}.eyebrow{color:var(--accent);font-size:11px;font-weight:700;letter-spacing:2.4px;margin:24px 0 8px}.login-card h1,.intro h1{font-size:32px;margin:0 0 30px}.login-card label,.tool-card label{display:block;font-size:12px;color:var(--muted);font-weight:600;margin:0 0 8px}.login-card input,.tool-card input{width:100%;height:48px;border:1px solid var(--line);border-radius:10px;background:#fafdff;color:var(--ink);padding:0 14px;outline:none}.login-card input:focus,.tool-card input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2f6edb18}.primary,.quiet{border:0;border-radius:10px;padding:0 18px;height:46px;font-weight:650}.primary{background:var(--accent);color:white}.primary:hover{background:#245fc1}.primary:disabled{opacity:.5;cursor:wait}.quiet{background:var(--soft);color:var(--accent)}.login-card .primary{width:100%;margin-top:18px}header{height:78px;padding:0 clamp(24px,5vw,72px);display:flex;align-items:center;justify-content:space-between;background:#ffffffc7;border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand-mark{width:42px;height:42px;border-radius:12px;font-size:21px}.brand small{color:var(--muted);font-weight:600;border-left:1px solid var(--line);padding-left:12px}.dashboard{width:min(1120px,calc(100% - 48px));margin:0 auto;padding:70px 0}.intro{margin-bottom:32px}.intro .eyebrow{margin-top:0}.intro h1{margin-bottom:0}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.tool-card{position:relative;background:var(--panel);border:1px solid #fff;border-radius:20px;padding:30px;box-shadow:0 18px 50px #355f9f12;overflow:hidden}.tool-number{position:absolute;right:24px;top:20px;color:#dce9fb;font-size:38px;font-weight:750}.tool-card h2{font-size:21px;margin:0 0 9px}.tool-card>p{color:var(--muted);margin:0 0 30px;line-height:1.6}.action-row{display:grid;grid-template-columns:1fr auto;gap:10px}.note{display:block;color:var(--muted);margin-top:12px}.result,.message{min-height:22px;margin-top:18px;color:var(--muted);word-break:break-all}.result[data-state=success],.message[data-state=success]{color:var(--accent);font-size:17px;font-weight:650}.result[data-state=error],.message[data-state=error]{color:var(--danger)}.code-result{display:flex;gap:10px;align-items:center;margin-top:18px}.code-result code{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;background:#f7fbff;padding:13px;color:var(--accent);font-size:16px;font-weight:700;user-select:all;overflow-wrap:anywhere}#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:white;padding:12px 18px;border-radius:10px}@media(max-width:760px){header{padding:0 20px}.dashboard{width:min(100% - 28px,600px);padding:42px 0}.tool-grid{grid-template-columns:1fr}.tool-card{padding:24px}.brand small{display:none}.login-card{padding:30px}.action-row{grid-template-columns:1fr}.action-row .primary{width:100%}}