/* MailHub — 邮箱聚合。暗色高级风,无 emoji,数字 tabular-nums。 */
@font-face {
  font-family: 'MHNum';
  src: local('SF Pro Display'), local('Segoe UI'), local('Roboto');
  unicode-range: U+0030-0039, U+002C, U+002E;
}
:root, [data-theme="dark"] {
  --bg: #0d1117;
  --bg-1: #12181f;
  --bg-2: #171f29;
  --bg-3: #1d2732;
  --line: #232f3d;
  --line-2: #2c3a4b;
  --text: #e6edf3;
  --text-2: #9fb0c3;
  --text-3: #6b7c8f;
  --accent: #5b8def;
  --accent-2: #4374d6;
  --accent-soft: #9dc0ff;
  --green: #3fb950;
  --red: #f85149;
  --amber: #d29922;
  --danger-text: #ff9d97;
  --radius: 10px;
  --shadow: 0 8px 30px rgba(0,0,0,.45);
  /* 玻璃拟态 */
  --panel: rgba(22,29,39,.60);
  --panel-2: rgba(13,17,23,.46);
  --glass-border: rgba(255,255,255,.07);
  --modal-glass: rgba(20,27,36,.82);
  --blur: 16px;
  /* 页面氛围底(玻璃后透出的柔光) */
  --amb-1: rgba(91,141,239,.14);
  --amb-2: rgba(163,113,247,.10);
  --amb-3: rgba(57,160,201,.10);
  --amb-base: #0b0f14;
  font-synthesis: none;
}
[data-theme="light"] {
  --bg: #ffffff;
  --bg-1: #f6f8fb;
  --bg-2: #eef2f7;
  --bg-3: #e5ebf3;
  --line: #e6ebf2;
  --line-2: #d3dbe6;
  --text: #1b2632;
  --text-2: #556475;
  --text-3: #8593a4;
  --accent: #3b6fe0;
  --accent-2: #2f5cc4;
  --accent-soft: #3b6fe0;
  --green: #2e9e4b;
  --red: #e5484d;
  --amber: #b7861b;
  --danger-text: #cf3a3a;
  --shadow: 0 10px 34px rgba(40,60,95,.14);
  --panel: rgba(255,255,255,.56);
  --panel-2: rgba(255,255,255,.42);
  --glass-border: rgba(20,35,60,.10);
  --modal-glass: rgba(255,255,255,.82);
  --blur: 16px;
  --amb-1: rgba(91,141,239,.16);
  --amb-2: rgba(163,113,247,.12);
  --amb-3: rgba(57,160,201,.12);
  --amb-base: #eaf0f7;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(900px 520px at 12% -8%, var(--amb-1), transparent 60%),
    radial-gradient(820px 520px at 100% 0%, var(--amb-2), transparent 55%),
    radial-gradient(760px 620px at 50% 120%, var(--amb-3), transparent 55%),
    var(--amb-base);
  background-attachment: fixed;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: color .3s ease;
}
.num { font-family: 'MHNum', inherit; font-variant-numeric: tabular-nums; font-feature-settings: 'tnum' 1; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
a { color: var(--accent); text-decoration: none; }

/* ---------- 通用控件 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  background: var(--bg-3); color: var(--text); border: 1px solid var(--line-2);
  padding: 8px 14px; border-radius: 8px; font-size: 13px; font-weight: 500;
  transition: .15s;
}
.btn:hover { background: var(--line-2); border-color: var(--line-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn.ghost:hover { background: var(--bg-3); color: var(--text); }
.btn.danger { color: var(--red); border-color: transparent; background: transparent; }
.btn.danger:hover { background: rgba(248,81,73,.12); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.sm { padding: 5px 10px; font-size: 12px; }
.icon-btn {
  width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; background: transparent; border: none; color: var(--text-2);
}
.icon-btn:hover { background: var(--bg-3); color: var(--text); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn.off { color: var(--text-3); opacity: .55; }

input.field, textarea.field, select.field {
  width: 100%; background: var(--bg); border: 1px solid var(--line-2); color: var(--text);
  padding: 10px 12px; border-radius: 8px; font-size: 13px; transition: border-color .15s;
}
input.field:focus, textarea.field:focus, select.field:focus { outline: none; border-color: var(--accent); }
label.lbl { display: block; font-size: 12px; color: var(--text-2); margin: 0 0 6px; }
.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

/* ---------- 登录页 ---------- */
.auth-wrap { min-height: 100%; display: grid; place-items: center; padding: 24px; }
.auth-card { width: 100%; max-width: 400px; background: var(--modal-glass);
  -webkit-backdrop-filter: blur(calc(var(--blur) + 6px)); backdrop-filter: blur(calc(var(--blur) + 6px));
  border: 1px solid var(--glass-border); border-radius: 16px; padding: 34px 30px; box-shadow: var(--shadow);
  transition: background-color .3s ease, border-color .3s ease; }
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.brand .logo { width: 34px; height: 34px; border-radius: 9px; background: var(--accent);
  display: grid; place-items: center; }
.brand .logo svg { width: 20px; height: 20px; color: #fff; }
.brand h1 { font-size: 19px; font-weight: 650; letter-spacing: .2px; }
.auth-sub { color: var(--text-3); font-size: 13px; margin: 8px 0 24px; }
.auth-card .lbl { margin-top: 14px; }
.auth-card .btn { width: 100%; margin-top: 22px; padding: 11px; }
.auth-switch { text-align: center; margin-top: 18px; color: var(--text-3); font-size: 13px; }
.auth-docs { text-align: center; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--glass-border); font-size: 12.5px; }
.auth-docs a { color: var(--text-2); }
.auth-docs a:hover { color: var(--accent); }
.auth-docs span { color: var(--text-3); margin: 0 6px; }
.captcha-row { display: flex; gap: 10px; align-items: stretch; }
.captcha-row .field { flex: 1; }
.captcha-img { width: 122px; flex-shrink: 0; padding: 0; border: 1px solid var(--line-2); border-radius: 8px;
  overflow: hidden; cursor: pointer; background: #0d1117; display: flex; align-items: center; justify-content: center; }
.captcha-img:hover { border-color: var(--accent); }
.captcha-img svg { width: 100%; height: 100%; display: block; }
.cap-load { width: 14px; height: 14px; border: 2px solid var(--line-2); border-top-color: var(--text-3); border-radius: 50%; animation: sp .7s linear infinite; }

/* 富文本编辑器 */
.rt-toolbar { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; padding: 6px; background: var(--bg-2);
  border: 1px solid var(--line-2); border-bottom: none; border-radius: 8px 8px 0 0; }
.rt-toolbar button { min-width: 28px; height: 26px; padding: 0 7px; background: transparent; border: none; border-radius: 5px;
  color: var(--text-2); font-size: 13px; cursor: pointer; }
.rt-toolbar button:hover { background: var(--bg-3); color: var(--text); }
.rt-sep { width: 1px; height: 16px; background: var(--line-2); margin: 0 4px; }
.rt-editor { min-height: 180px; max-height: 340px; overflow-y: auto; padding: 12px 14px; background: var(--bg);
  border: 1px solid var(--line-2); border-radius: 0 0 8px 8px; color: var(--text); font-size: 14px; line-height: 1.6; outline: none; }
.rt-editor:focus { border-color: var(--accent); }
.rt-editor:empty:before { content: attr(data-ph); color: var(--text-3); }
.rt-editor blockquote { border-left: 2px solid var(--line-2); margin: 8px 0; padding-left: 12px; color: var(--text-2); }
.rt-editor a { color: var(--accent); }

/* 写信附件 */
.cp-attach-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.cp-att { display: inline-flex; align-items: center; gap: 7px; background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; font-size: 12.5px; }
.cp-att svg { width: 15px; height: 15px; color: var(--text-3); }
.cp-att-name { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cp-att-x { background: none; border: none; color: var(--text-3); cursor: pointer; font-size: 16px; line-height: 1; padding: 0 2px; }
.cp-att-x:hover { color: var(--red); }
.cp-att-total { flex-basis: 100%; font-size: 11.5px; color: var(--text-3); }
.cp-att-total.over { color: var(--danger-text); }

/* 加载更多 */
.list-footer { padding: 14px 16px 22px; text-align: center; }
.load-more { width: 100%; justify-content: center; color: var(--text-2); }

.err-msg { background: rgba(248,81,73,.1); border: 1px solid rgba(248,81,73,.3); color: var(--danger-text);
  padding: 9px 12px; border-radius: 8px; font-size: 12.5px; margin-top: 14px; }

/* ---------- 主布局 ---------- */
.app { display: none; height: 100vh; grid-template-columns: 250px 380px 1fr; }
.app.on { display: grid; }

/* 左栏 */
.side { background: var(--panel); -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  border-right: 1px solid var(--glass-border); display: flex; flex-direction: column; min-height: 0;
  transition: background-color .3s ease, border-color .3s ease; }
.side-top { padding: 16px 16px 12px; }
.side .brand h1 { font-size: 16px; }
.compose-btn { width: 100%; margin-top: 14px; padding: 10px; font-weight: 600; }
.side-scroll { flex: 1; overflow-y: auto; padding: 4px 10px 10px; }
.side-sec { font-size: 11px; text-transform: uppercase; letter-spacing: .6px; color: var(--text-3);
  padding: 14px 8px 6px; display: flex; justify-content: space-between; align-items: center; }
.side-sec .add { color: var(--text-3); cursor: pointer; }
.side-sec .add:hover { color: var(--accent); }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px;
  color: var(--text-2); cursor: pointer; font-size: 13.5px; transition: .12s; }
.nav-item:hover { background: var(--bg-2); color: var(--text); }
.nav-item.active { background: var(--bg-3); color: var(--text); }
.nav-item svg { width: 17px; height: 17px; flex-shrink: 0; }
.nav-item .dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.nav-item .n-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .badge { font-size: 11px; color: var(--text-3); }
.nav-item.active .badge, .nav-item:hover .badge { color: var(--text-2); }
.nav-item.sub { padding: 6px 10px 6px 30px; font-size: 12.5px; color: var(--text-3); position: relative; }
.nav-item.sub::before { content: ''; position: absolute; left: 16px; top: 50%; width: 6px; height: 6px;
  border-left: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); transform: translateY(-70%); }
.nav-item.sub:hover { color: var(--text); }
.nav-item.sub.active { background: var(--bg-3); color: var(--text); }
.acc-status { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.acc-status.ok { background: var(--green); }
.acc-status.error { background: var(--red); }
.acc-status.new { background: var(--text-3); }
.side-bottom { border-top: 1px solid var(--line); padding: 10px 12px; display: flex; align-items: center; gap: 8px; }
.side-bottom .who { flex: 1; font-size: 12px; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 中栏:邮件列表 */
.list-col { background: var(--panel-2); -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  border-right: 1px solid var(--glass-border); display: flex; flex-direction: column; min-height: 0;
  transition: background-color .3s ease, border-color .3s ease; }
.list-head { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.list-head .title-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.title-ops { display: flex; align-items: center; gap: 4px; }
.list-head h2 { font-size: 16px; font-weight: 620; }
.search-box { position: relative; }
.search-box svg { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--text-3); }
.search-box input { padding-left: 34px; background: var(--bg-2); border-color: var(--line); }
.list-filters { display: flex; gap: 6px; margin-top: 10px; }
.chip { font-size: 12px; padding: 4px 11px; border-radius: 20px; background: var(--bg-2); color: var(--text-2); border: 1px solid transparent; }
.chip:hover { color: var(--text); }
.chip.on { background: rgba(91,141,239,.15); color: var(--accent-soft); border-color: rgba(91,141,239,.3); }
.list-scroll { flex: 1; overflow-y: auto; }
.mail-item { padding: 13px 16px; border-bottom: 1px solid var(--line); cursor: pointer; transition: background .1s; position: relative; }
.mail-item:hover { background: var(--bg-1); }
.mail-item.active { background: var(--bg-2); }
.mail-item.unread .mi-from, .mail-item.unread .mi-subj { color: var(--text); font-weight: 600; }
.mail-item .mi-top { display: flex; align-items: center; gap: 8px; margin-bottom: 3px; }
.mi-badge { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.mi-from { flex: 1; font-size: 13.5px; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mi-date { font-size: 11.5px; color: var(--text-3); flex-shrink: 0; }
.mi-subj { font-size: 13px; color: var(--text-2); margin-bottom: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mi-snip { font-size: 12px; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mi-tags { display: flex; gap: 6px; align-items: center; margin-top: 5px; }
.mi-acc { font-size: 10.5px; padding: 1px 7px; border-radius: 4px; color: #fff; opacity: .9; }
.mi-to-tag { font-size: 10.5px; color: var(--text-3); font-weight: 400; margin-right: 1px; }
.mi-attach { color: var(--text-3); display: inline-flex; align-items: center; }
.mi-attach svg { width: 13px; height: 13px; }
.mi-flag { color: var(--amber); }
.mi-flag svg { width: 13px; height: 13px; }

/* 右栏:阅读 */
.read-col { background: var(--panel); -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  display: flex; flex-direction: column; min-height: 0; transition: background-color .3s ease; }
.read-head { padding: 18px 24px 14px; border-bottom: 1px solid var(--line); }
.read-head h1 { font-size: 19px; font-weight: 620; line-height: 1.35; margin-bottom: 14px; }
.read-meta { display: flex; align-items: center; gap: 12px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 600; font-size: 16px; flex-shrink: 0; }
.read-meta .m-info { flex: 1; min-width: 0; }
.read-meta .m-from { font-size: 14px; font-weight: 600; }
.read-meta .m-addr { font-size: 12.5px; color: var(--text-3); }
.read-meta .m-to { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.read-meta .m-date { font-size: 12px; color: var(--text-3); text-align: right; }
.read-actions { display: flex; gap: 6px; padding: 12px 24px; border-bottom: 1px solid var(--line); }
.read-body-wrap { flex: 1; overflow: hidden; background: #fff; }
.read-body-wrap iframe { width: 100%; height: 100%; border: none; background: #fff; }
.read-attaches { padding: 14px 24px; border-top: 1px solid var(--line); background: transparent; }
.read-attaches .at-title { font-size: 12px; color: var(--text-3); margin-bottom: 10px; }
.at-item { display: inline-flex; align-items: center; gap: 9px; background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 12px; margin: 0 8px 8px 0; font-size: 12.5px; color: var(--text);
  text-decoration: none; cursor: pointer; transition: .12s; }
.at-item:hover { border-color: var(--accent); background: var(--bg-3); }
.at-item svg { width: 16px; height: 16px; color: var(--text-3); }
.at-item .at-size { color: var(--text-3); }
.at-item .at-dl { margin-left: 2px; opacity: 0; transition: .12s; }
.at-item:hover .at-dl { opacity: 1; }
.at-item:hover .at-dl svg { color: var(--accent); }

/* 空态 */
.empty { flex: 1; display: grid; place-items: center; padding: 40px; text-align: center; }
.empty .e-inner { max-width: 300px; }
.empty svg { width: 44px; height: 44px; color: var(--line-2); margin-bottom: 16px; }
.empty h3 { font-size: 15px; color: var(--text-2); font-weight: 550; margin-bottom: 6px; }
.empty p { font-size: 13px; color: var(--text-3); line-height: 1.6; }

/* ---------- 弹窗 ---------- */
.mask { position: fixed; inset: 0; background: rgba(3,7,12,.66); backdrop-filter: blur(3px);
  display: none; place-items: center; z-index: 100; padding: 24px; }
.mask.on { display: grid; }
.modal { width: 100%; max-width: 540px; max-height: 90vh; overflow-y: auto; background: var(--modal-glass);
  -webkit-backdrop-filter: blur(calc(var(--blur) + 6px)); backdrop-filter: blur(calc(var(--blur) + 6px));
  border: 1px solid var(--glass-border); border-radius: 14px; box-shadow: var(--shadow); }
.modal.wide { max-width: 680px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.modal-head h3 { font-size: 16px; font-weight: 620; }
.modal-body { padding: 20px 22px; }
.modal-foot { padding: 16px 22px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 10px; }
.form-grp { margin-bottom: 14px; }
.hint { font-size: 12px; color: var(--text-3); margin-top: 6px; line-height: 1.5; }
.hint.warn { color: var(--amber); }
.adv-toggle { font-size: 12.5px; color: var(--accent); cursor: pointer; margin: 6px 0 14px; display: inline-block; }
.adv-box { display: none; padding: 14px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 14px; }
.adv-box.on { display: block; }
.provider-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 6px; }
.p-chip { font-size: 12px; padding: 5px 12px; border-radius: 7px; background: var(--bg-2); border: 1px solid var(--line); color: var(--text-2); }
.p-chip:hover { border-color: var(--line-2); color: var(--text); }
.p-chip.on { background: rgba(91,141,239,.15); border-color: var(--accent); color: var(--accent-soft); }
/* 常用邮箱快捷卡片网格 */
.provider-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 4px; }
.p-card { display: flex; flex-direction: column; align-items: center; gap: 7px; padding: 12px 6px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; color: var(--text-2); transition: .13s; }
.p-card:hover { border-color: var(--line-2); color: var(--text); transform: translateY(-1px); }
.p-card.on { border-color: var(--accent); background: rgba(91,141,239,.1); }
.p-card.on .p-nm { color: var(--accent-soft); }
.p-ic { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: -.3px; }
.p-nm { font-size: 11.5px; line-height: 1.2; text-align: center; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; max-width: 100%; }
@media (max-width: 560px) { .provider-grid { grid-template-columns: repeat(3, 1fr); } }

/* 账号列表(管理弹窗) */
.acc-row { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.acc-row:last-child { border-bottom: none; }
.acc-logo { width: 28px; height: 28px; border-radius: 7px; flex-shrink: 0; display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 12px; letter-spacing: -.3px; }
.acc-row .a-main { flex: 1; min-width: 0; }
.acc-row .a-email { font-size: 13.5px; font-weight: 500; }
.acc-row .a-sub { font-size: 12px; color: var(--text-3); margin-top: 1px; }
.acc-row .a-sub.err { color: var(--danger-text); }
.acc-row .a-ops { display: flex; gap: 4px; }

/* 管理员控制台 */
.admin-stats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-bottom: 16px; }
.stat-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 10px; text-align: center; }
.stat-num { font-size: 20px; font-weight: 650; color: var(--text); line-height: 1.1; }
.stat-num.small { font-size: 15px; }
.stat-num.err { color: var(--danger-text); }
.stat-lbl { font-size: 11.5px; color: var(--text-3); margin-top: 4px; }
.stat-sub { font-size: 10.5px; color: var(--text-2); margin-top: 3px; }
.admin-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.switch-row { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-2); cursor: pointer; }
.switch { position: relative; width: 40px; height: 22px; border-radius: 11px; background: var(--bg-3); border: 1px solid var(--line-2); padding: 0; cursor: pointer; transition: .16s; }
.switch .knob { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: var(--text-3); transition: .16s; }
.switch.on { background: var(--accent); border-color: var(--accent); }
.switch.on .knob { left: 20px; background: #fff; }
.search-box.sm { flex: 1; min-width: 180px; max-width: 280px; }
.search-box.sm input { padding-left: 12px; }
.utag { font-size: 10.5px; padding: 1px 6px; border-radius: 4px; margin-left: 6px; vertical-align: middle; }
.utag.admin { color: var(--amber); background: rgba(210,153,34,.13); }
.utag.off { color: var(--danger-text); background: rgba(248,81,73,.13); }
.utag.on { color: var(--green); background: rgba(63,185,80,.13); }
.utag.me { color: var(--text-3); background: var(--bg-3); }
.a-sub .err, .uacc-meta .err { color: var(--danger-text); }
.user-accounts { background: var(--bg-1); border-radius: 8px; margin: -2px 0 8px 22px; border: 1px solid var(--line); }
.uacc-item { display: flex; align-items: center; gap: 9px; padding: 8px 12px; font-size: 12.5px; border-bottom: 1px solid var(--line); }
.uacc-item:last-child { border-bottom: none; }
.uacc-email { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.uacc-meta { margin-left: auto; color: var(--text-3); flex-shrink: 0; }
@media (max-width: 640px) { .admin-stats { grid-template-columns: repeat(3, 1fr); } }

/* toast */
.toast-wrap { position: fixed; top: 20px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--bg-3); border: 1px solid var(--line-2); color: var(--text); padding: 10px 18px;
  border-radius: 9px; font-size: 13px; box-shadow: var(--shadow); animation: slidein .2s; max-width: 420px; }
.toast.ok { border-color: rgba(63,185,80,.4); }
.toast.err { border-color: rgba(248,81,73,.4); color: var(--danger-text); }
@keyframes slidein { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; } }

/* loader */
.spin { width: 15px; height: 15px; border: 2px solid rgba(255,255,255,.25); border-top-color: #fff; border-radius: 50%; animation: sp .7s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }
.center-load { flex: 1; display: grid; place-items: center; color: var(--text-3); }

/* 折叠(窄屏) */
@media (max-width: 1100px) {
  .app { grid-template-columns: 220px 1fr; }
  .read-col { display: none; }
  .app.reading .list-col { display: none; }
  .app.reading .read-col { display: flex; }
}
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .side { display: none; }
}
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--line-2); }
::-webkit-scrollbar-track { background: transparent; }

/* 首屏 loading 占位(避免已登录刷新闪现登录页) */
.boot-loading { position: fixed; inset: 0; display: grid; place-items: center; z-index: 9999;
  background: var(--bg); }
.boot-loading .spin { width: 28px; height: 28px; border: 3px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 左栏账号导航 logo 圆点 */
.nav-item .acc-logo-sm { width: 16px; height: 16px; border-radius: 4px; flex-shrink: 0; display: inline-grid;
  place-items: center; color: #fff; font-weight: 700; font-size: 9px; margin-right: 2px; }