:root{
  --bg:#0b1220; --panel:#121b2e; --panel2:#0f1828; --ink:#e8eef7; --sub:#9fb0c7;
  --line:#1f2c44; --haiken:#1e88e5; --hi:#ffb300; --ok:#7ee0a0;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:radial-gradient(1200px 600px at 85% -10%,#16233c 0%,var(--bg) 55%);color:var(--ink);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,sans-serif;line-height:1.6;overflow:hidden}
#app{display:flex;flex-direction:column;height:100vh}

/* topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 22px;
  border-bottom:1px solid var(--line);background:rgba(15,24,40,.6);backdrop-filter:blur(8px)}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,#1e88e5,#0d47a1);
  display:flex;align-items:center;justify-content:center;font-size:22px}
.topbar h1{font-size:20px;font-weight:500;letter-spacing:1px}
.topbar h1 .sub{color:var(--sub);font-size:13px;font-weight:400;margin-left:6px}
.topbar .meta{color:var(--sub);font-size:12px;margin-top:3px}
.search input{background:var(--panel2);border:1px solid var(--line);color:var(--ink);
  padding:8px 14px;border-radius:20px;font-size:13px;width:260px;outline:none}
.search input:focus{border-color:var(--haiken)}

/* layout */
.layout{flex:1;display:flex;min-height:0}
.sidebar{width:300px;flex:0 0 300px;border-right:1px solid var(--line);
  background:var(--panel);display:flex;flex-direction:column}
.side-head{padding:14px 18px 8px;font-size:12px;color:var(--sub);letter-spacing:2px;border-bottom:1px solid var(--line)}
.issue-list{flex:1;overflow-y:auto;list-style:none;padding:6px 0}
.issue-list .loading{padding:18px;color:var(--sub);font-size:13px;text-align:center}
.issue-item{padding:12px 18px;border-bottom:1px solid var(--line);cursor:pointer;transition:.15s;border-left:3px solid transparent}
.issue-item:hover{background:var(--panel2)}
.issue-item.active{background:var(--panel2);border-left-color:var(--haiken)}
.issue-item .date{font-size:12px;color:var(--haiken);font-weight:500}
.issue-item .no{color:var(--sub);font-size:11px;margin-left:6px}
.issue-item .title{font-size:13.5px;margin:4px 0 6px;color:var(--ink);line-height:1.4}
.issue-item .tags{display:flex;flex-wrap:wrap;gap:4px}
.issue-item .tag{font-size:10.5px;color:#bfe0ff;background:rgba(30,136,229,.12);
  border:1px solid rgba(30,136,229,.28);padding:1px 7px;border-radius:10px}
.issue-item.empty-match{display:none}
.side-foot{padding:10px 18px;border-top:1px solid var(--line);font-size:12px}
.side-foot a{color:var(--sub);text-decoration:none}
.side-foot a:hover{color:var(--haiken)}

/* viewer */
.viewer{flex:1;min-width:0;position:relative;background:var(--bg)}
.empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--sub);text-align:center;gap:8px}
.empty-ico{font-size:48px;opacity:.5}
.empty p{font-size:15px}
.empty .hint{font-size:12px;color:#5d6e8a}
.empty code{background:var(--panel2);padding:2px 7px;border-radius:5px;color:var(--hi);font-size:12px}
.issue-frame{position:absolute;inset:0;width:100%;height:100%;border:none;background:#fff}

/* about panel */
.about{position:absolute;inset:0;overflow-y:auto;padding:36px 48px;color:var(--ink);max-width:760px;margin:0 auto}
.about h2{font-size:22px;font-weight:500;margin-bottom:14px;color:var(--hi)}
.about h3{font-size:15px;font-weight:500;margin:22px 0 8px;color:var(--ok)}
.about p,.about li{font-size:13.5px;color:#cdd9ea;margin:6px 0}
.about ul,.about ol{padding-left:22px}
.about code{background:var(--panel2);padding:2px 7px;border-radius:5px;color:var(--hi);font-size:12.5px}
.about pre{background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:12px 14px;
  font-size:12.5px;color:#cdd9ea;overflow-x:auto;margin:8px 0}
.about .hint{color:#5d6e8a;font-size:12px}

/* scrollbar */
.issue-list::-webkit-scrollbar,.about::-webkit-scrollbar{width:8px}
.issue-list::-webkit-scrollbar-thumb,.about::-webkit-scrollbar-thumb{background:#2a3a57;border-radius:4px}