:root{
  --bg:#fffaf4; --panel:#ffffff; --side:#fdf1e4; --line:#efe2d3; --ink:#3b2d25; --muted:#8a7668;
  --accent:#ef6f5e; --accent-soft:#ffe3dc; --hover:#fbefe3; --unread:#ffffff; --read:#fbf6f0;
  --shadow:0 1px 3px rgba(60,40,20,.08),0 6px 20px rgba(60,40,20,.08);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font:15px/1.45 "Nunito",system-ui,-apple-system,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
button{font:inherit;color:inherit}
input,textarea{font:inherit;color:inherit}
.muted{color:var(--muted)} .small{font-size:13px}
.err{color:#c0392b;min-height:1.2em;margin:4px 0 0}

.btn{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 18px;cursor:pointer;font-weight:700}
.btn:hover{background:var(--hover)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{filter:brightness(.95)}
.btn.small{padding:5px 12px;font-size:13px}
.btn:disabled{opacity:.6;cursor:default}
.icon-btn{background:none;border:0;border-radius:50%;width:40px;height:40px;display:inline-grid;place-items:center;cursor:pointer;font-size:18px;flex:none}
.icon-btn:hover{background:var(--hover)}
.link-btn{background:none;border:0;color:var(--accent);cursor:pointer;padding:0;font-weight:700}

/* sign in */
.login{min-height:100%;display:grid;place-items:center;padding:16px}
.login-card{background:var(--panel);border-radius:24px;box-shadow:var(--shadow);padding:32px 28px;width:min(360px,100%);text-align:center;display:grid;gap:10px}
.login-card img{margin:0 auto;border-radius:18px}
.login-card h1{margin:4px 0 0;font-size:26px}
.login-card p{margin:0}
.login-card input{border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:16px;text-align:center}
.login-card .btn{padding:12px}

/* layout */
.app{display:grid;grid-template-columns:240px 1fr;grid-template-rows:64px 1fr;height:100%}
.top{grid-column:1/-1;display:flex;align-items:center;gap:10px;padding:0 12px;border-bottom:1px solid var(--line);background:var(--bg)}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:19px;width:216px;flex:none}
.brand img{border-radius:9px}
.menu-btn{display:none}
.search{flex:1;max-width:720px;display:flex;align-items:center;gap:8px;background:#f6ebde;border-radius:999px;padding:0 16px;height:44px}
.search:focus-within{background:var(--panel);box-shadow:var(--shadow)}
.search input{flex:1;border:0;background:none;outline:none;font-size:16px;min-width:0}

.side{padding:12px 10px;overflow:auto;display:flex;flex-direction:column;gap:2px;background:var(--bg)}
.compose-btn{background:var(--accent-soft);border:0;border-radius:18px;padding:16px 22px;font-weight:800;font-size:16px;cursor:pointer;text-align:left;margin:0 0 12px;width:fit-content;box-shadow:0 1px 2px rgba(0,0,0,.06)}
.compose-btn:hover{box-shadow:var(--shadow)}
.side a{display:flex;justify-content:space-between;align-items:center;padding:8px 16px;border-radius:999px;color:inherit;text-decoration:none;font-weight:600}
.side a:hover{background:var(--hover)}
.side a.on{background:var(--accent-soft);font-weight:800}
.side a b{font-size:13px}
.side-foot{margin-top:auto;padding:12px 16px;display:grid;gap:6px;justify-items:start}
.scrim{display:none}

.main{overflow:auto;background:var(--panel);border-top-left-radius:18px;position:relative}
.toolbar{display:flex;align-items:center;gap:6px;padding:8px 16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel);z-index:2;min-height:52px}
.toolbar h2{margin:0;font-size:17px;flex:1}

/* list */
.list{list-style:none;margin:0;padding:0}
.list li{display:grid;grid-template-columns:28px 190px 1fr auto;gap:10px;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line);cursor:pointer;background:var(--read)}
.list li.unread{background:var(--unread);font-weight:800}
.list li:hover{box-shadow:inset 0 0 0 1px var(--line),0 1px 4px rgba(60,40,20,.12);position:relative}
.star{background:none;border:0;cursor:pointer;font-size:17px;color:#c9b8a8;padding:0;line-height:1}
.star.on{color:#f4b400}
.list .who,.list .line{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list .line .snip{color:var(--muted);font-weight:400}
.list .date{font-size:13px;white-space:nowrap}
.list .clip{margin-left:4px;font-weight:400}
.empty{padding:60px 20px;text-align:center;color:var(--muted)}
.more{display:block;margin:16px auto}

/* read */
.msg{padding:20px 24px 40px;max-width:980px}
.msg h1{font-size:22px;margin:4px 0 18px;font-weight:700}
.msg-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:16px}
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;flex:none}
.who{flex:1;min-width:0;overflow-wrap:anywhere}
.when{white-space:nowrap}
.msg-body{overflow-x:auto}
.msg-body iframe{width:100%;border:0;min-height:120px;display:block;background:#fff}
.msg-body pre{white-space:pre-wrap;font:inherit;margin:0;overflow-wrap:anywhere}
.atts{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.att{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:12px;padding:8px 12px;text-decoration:none;color:inherit;max-width:280px}
.att:hover{background:var(--hover)}
.att span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.reply-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}

/* compose */
.compose{position:fixed;right:24px;bottom:0;width:min(560px,100vw);height:min(560px,90vh);background:var(--panel);border-radius:16px 16px 0 0;box-shadow:0 8px 40px rgba(40,25,10,.28);display:flex;flex-direction:column;z-index:30}
.compose-head{display:flex;align-items:center;justify-content:space-between;padding:6px 8px 6px 16px;background:#f6ebde;border-radius:16px 16px 0 0}
.field{display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--line);padding:0 16px}
.field span{color:var(--muted);font-size:14px;width:56px;flex:none}
.field input{flex:1;border:0;outline:none;padding:10px 0;min-width:0;background:none}
.ccbcc{align-self:flex-end;margin:-30px 16px 8px 0;font-size:13px;position:relative}
.compose textarea{flex:1;border:0;outline:none;resize:none;padding:12px 16px;font-size:15px;min-height:120px}
.files{display:flex;flex-wrap:wrap;gap:6px;padding:0 16px}
.files span{background:var(--hover);border-radius:999px;padding:3px 6px 3px 12px;font-size:13px;display:flex;align-items:center;gap:4px}
.files button{border:0;background:none;cursor:pointer}
.compose-foot{display:flex;align-items:center;gap:8px;padding:10px 12px}
.compose-foot .muted{flex:1}
.attach{cursor:pointer}

.fab{display:none}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,120px);background:#3b2d25;color:#fff;padding:10px 18px;border-radius:12px;transition:transform .25s;z-index:50;max-width:90vw}
.toast.show{transform:translate(-50%,0)}

/* phones */
@media (max-width:760px){
  .app{grid-template-columns:1fr;grid-template-rows:60px 1fr}
  .top{padding:0 6px;gap:4px}
  .menu-btn{display:inline-grid}
  .brand{display:none}
  .search{height:42px}
  .side{position:fixed;inset:0 auto 0 0;width:260px;z-index:40;transform:translateX(-105%);transition:transform .2s;box-shadow:var(--shadow);padding-top:16px}
  .side.open{transform:none}
  .scrim.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:35}
  .compose-btn{display:none}
  .main{border-radius:0}
  .list li{grid-template-columns:24px 1fr auto;grid-template-areas:"star who date" "star line line";row-gap:2px;padding:12px}
  .list li .star{grid-area:star;align-self:start}
  .list li .who{grid-area:who}
  .list li .date{grid-area:date}
  .list li .line{grid-area:line;white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
  .msg{padding:14px 14px 90px}
  .fab{display:grid;place-items:center;position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));width:58px;height:58px;border-radius:18px;border:0;background:var(--accent-soft);font-size:22px;box-shadow:var(--shadow);z-index:20;cursor:pointer}
  .compose{inset:0;width:auto;height:auto;border-radius:0}
  .compose-head{border-radius:0;padding-top:calc(6px + env(safe-area-inset-top))}
  .compose-foot{padding-bottom:calc(10px + env(safe-area-inset-bottom))}
}