:root{--ink:#1d2433;--ink2:#5b6472;--line:#e3e7ee;--accent:#2456d6;--accent-soft:#eef3ff;--paper:#fdfdfb;--bg:#f6f7f9}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16.5px}
a{color:var(--accent)}
.wrap{max-width:1060px;margin:0 auto;padding:0 20px}
header.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top-in{max-width:1060px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:700;font-size:18px;color:var(--ink);text-decoration:none}
.logo span{font-family:'Caveat',cursive;color:var(--accent);font-size:24px}
nav.main a{color:var(--ink2);text-decoration:none;margin-left:22px;font-size:14.5px}
nav.main a:hover{color:var(--accent)}
.hero{text-align:center;padding:44px 0 10px}
h1{font-size:clamp(26px,4.5vw,40px);letter-spacing:-.01em;line-height:1.15}
.hero p.lead{color:var(--ink2);font-size:18px;max-width:640px;margin:12px auto 0}
.badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.badge{font-size:12.5px;background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:4px 12px;font-weight:600}
/* tool */
.tool{display:grid;grid-template-columns:340px 1fr;gap:22px;margin:30px 0 10px}
@media(max-width:860px){.tool{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;align-self:start;position:sticky;top:72px}
@media(max-width:860px){.panel{position:static}}
.panel label{display:block;font-size:12.5px;font-weight:600;color:var(--ink2);text-transform:uppercase;letter-spacing:.05em;margin:14px 0 5px}
.panel label:first-child{margin-top:0}
textarea#th-text{width:100%;min-height:150px;border:1.5px solid var(--line);border-radius:10px;padding:12px;font-size:15px;font-family:inherit;resize:vertical}
textarea#th-text:focus{outline:none;border-color:var(--accent)}
.panel select,.panel input[type=color]{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:9px 10px;font-size:14.5px;background:#fff}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.chk{display:flex;align-items:center;gap:8px;margin-top:14px;font-size:14px;color:var(--ink)}
.chk input{width:16px;height:16px}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}
button.b{border:none;border-radius:10px;padding:12px;font-size:15px;font-weight:600;cursor:pointer}
button.b.primary{background:var(--accent);color:#fff}
button.b.primary:hover{background:#1c46b4}
button.b.ghost{background:var(--accent-soft);color:var(--accent)}
#th-status{font-size:12.5px;color:var(--ink2);margin-top:10px;text-align:center}
#th-preview{display:flex;flex-direction:column;gap:18px}
canvas.th-page{width:100%;height:auto;border:1px solid var(--line);border-radius:8px;box-shadow:0 2px 14px rgba(20,30,60,.07);background:var(--paper)}
/* content sections */
section.content{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px;margin:26px 0}
section.content h2{font-size:22px;margin-bottom:12px}
section.content h3{font-size:17px;margin:18px 0 6px}
section.content ol,section.content ul{margin:10px 0 10px 22px}
section.content li{margin:6px 0}
details{border-bottom:1px solid var(--line);padding:12px 0}
details summary{font-weight:600;cursor:pointer;font-size:15.5px}
details p{margin-top:8px;color:var(--ink2);font-size:15px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:14px}
.card{border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;display:block}
.card:hover{border-color:var(--accent)}
.card b{color:var(--ink);font-size:15px;display:block;margin-bottom:5px}
.card span{color:var(--ink2);font-size:13.5px}
/* blog article */
article.post{background:#fff;border:1px solid var(--line);border-radius:14px;padding:36px;margin:26px 0}
article.post h1{font-size:clamp(24px,3.6vw,32px);margin-bottom:6px}
article.post .meta{color:var(--ink2);font-size:14px;margin-bottom:18px}
article.post h2{font-size:21px;margin:26px 0 10px}
article.post h3{font-size:17px;margin:18px 0 8px}
article.post p{margin:10px 0}
article.post ul,article.post ol{margin:10px 0 10px 24px}
article.post table{width:100%;border-collapse:collapse;font-size:14.5px;margin:14px 0}
article.post th,article.post td{border:1px solid var(--line);padding:8px 10px;text-align:left}
article.post th{background:var(--bg)}
footer{padding:34px 0 46px;color:var(--ink2);font-size:13.5px;text-align:center}
footer a{color:var(--ink2)}