:root {
  --bg: #0b0d11;
  --bg-2: #12161c;
  --bg-3: #181d25;
  --line: rgba(232, 184, 109, 0.16);
  --hair: rgba(255, 255, 255, 0.06);
  --text: #edf1f6;
  --muted: #8d97a8;
  --faint: #5d6778;
  --brass: #e8b86d;
  --mint: #6ee7b7;
  --outlook: #6aa6ff;
  --gmail: #ef6d66;
  --icloud: #d5dae3;
  --imap: #b79bff;
  --hotmail: #58c4d8;
  --yahoo: #6f6cff;
  --danger: #ff7a7a;
  --ok: #4ade80;
  --warn: #f5c16c;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.38);
  --sans: "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Code", "Sarasa Mono SC", "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(232, 184, 109, 0.08), transparent 50%),
    radial-gradient(900px 400px at 100% 0%, rgba(110, 231, 183, 0.05), transparent 45%),
    var(--bg);
  color: var(--text);
  font: 14px/1.45 var(--sans);
}

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(100%, 380px);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .18);
}
.login-brand { margin-bottom: 28px; }
.login-card input { width: 100%; margin: 8px 0 12px; }
.login-submit { width: 100%; justify-content: center; margin-top: 4px; }
.login-error { color: var(--danger); margin: 0 0 10px; font-size: 13px; }
.login-note { color: var(--muted); font-size: 12px; line-height: 1.5; margin: 18px 0 0; }

.app {
  min-height: 100%;
  display: grid;
  grid-template-rows: auto auto 1fr;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 22px 10px;
  border-bottom: 1px solid var(--hair);
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand h1 { margin: 0; font-size: 20px; letter-spacing: 0.04em; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.mark {
  width: 34px; height: 34px; border-radius: 10px;
  background:
    linear-gradient(160deg, var(--brass), #8a5a20);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.2), 0 8px 18px rgba(232,184,109,0.18);
  position: relative;
}
.mark::after {
  content: "";
  position: absolute; inset: 9px 7px 8px;
  border: 1.5px solid #1a1208;
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% 38%, 50% 68%, 0 38%);
}
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn, .link, .icon-btn, .tab {
  font: inherit; color: inherit; cursor: pointer;
}
.btn {
  border: 1px solid var(--line);
  background: var(--bg-3);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
}
.btn:hover { border-color: var(--brass); }
.btn.ghost { background: transparent; }
.btn.accent {
  background: linear-gradient(180deg, #f0c888, #c99243);
  color: #21160a;
  border-color: transparent;
  font-weight: 650;
}
.btn.danger, .link.danger { color: var(--danger); }
.link { background: none; border: 0; padding: 0; }
.icon-btn {
  background: none; border: 0; font-size: 22px; line-height: 1; color: var(--muted);
}

.stats {
  display: flex;
  gap: 10px;
  padding: 12px 22px 8px;
  flex-wrap: wrap;
}
.stat {
  min-width: 110px;
  padding: 8px 12px;
  background: var(--bg-2);
  border: 1px solid var(--hair);
  border-radius: 12px;
}
.stat b { display: block; font-size: 18px; }
.stat span { color: var(--muted); font-size: 12px; }

.workspace {
  display: grid;
  grid-template-columns: 280px minmax(320px, 1fr) minmax(340px, 1.1fr);
  gap: 10px;
  padding: 8px 14px 14px;
  min-height: 0;
}
.pane {
  background: rgba(18, 22, 28, 0.92);
  border: 1px solid var(--hair);
  border-radius: 16px;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.pane-head {
  padding: 10px 12px;
  border-bottom: 1px solid var(--hair);
  display: grid;
  gap: 8px;
}
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--hair);
}
.search input, .field input, textarea {
  width: 100%;
  background: #0d1117;
  border: 1px solid var(--hair);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}
textarea { font-family: var(--mono); resize: vertical; }
.filters, .tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.chip, .tab {
  border: 1px solid var(--hair);
  background: transparent;
  border-radius: 999px;
  padding: 4px 9px;
  color: var(--muted);
  font-size: 12px;
}
.chip.on, .tab.on {
  color: #21160a;
  background: var(--brass);
  border-color: transparent;
}
.check { color: var(--muted); display: flex; gap: 6px; align-items: center; }
.muted { color: var(--muted); font-size: 12px; }

.account-list, .mail-list, .detail { overflow: auto; min-height: 0; }
.account {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--hair);
  cursor: pointer;
}
.account:hover, .account.active { background: var(--bg-3); }
.account .email { font-family: var(--mono); font-size: 12px; word-break: break-all; }
.account .meta { color: var(--muted); font-size: 11px; margin-top: 3px; }
.dot {
  width: 8px; height: 8px; border-radius: 50%; margin-top: 6px;
  background: var(--faint);
}
.dot.ok { background: var(--ok); }
.dot.error { background: var(--danger); }
.dot.expired { background: var(--warn); }
.badge {
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 999px;
  border: 1px solid var(--hair);
  color: var(--muted);
  height: fit-content;
}
.badge.outlook { color: var(--outlook); border-color: rgba(106,166,255,.35); }
.badge.hotmail { color: var(--hotmail); border-color: rgba(88,196,216,.35); }
.badge.gmail { color: var(--gmail); border-color: rgba(239,109,102,.35); }
.badge.icloud { color: var(--icloud); border-color: rgba(213,218,227,.3); }
.badge.imap, .badge.yahoo, .badge.qq, .badge.netease { color: var(--imap); border-color: rgba(183,155,255,.35); }

.mail {
  padding: 12px 14px;
  border-bottom: 1px solid var(--hair);
  cursor: pointer;
}
.mail:hover, .mail.active { background: var(--bg-3); }
.mail-top { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 12px; }
.mail h4 { margin: 4px 0; font-size: 14px; font-weight: 600; }
.mail .preview { color: var(--muted); font-size: 12px; }
.code-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  background: rgba(232, 184, 109, 0.12);
  color: var(--brass);
  border: 1px solid rgba(232, 184, 109, 0.28);
  border-radius: 8px;
  padding: 4px 8px;
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: 0.12em;
}
.folder-tag { font-size: 11px; color: var(--faint); }

.detail { padding: 16px; }
.detail.empty { display: grid; place-items: center; }
.empty-card {
  max-width: 440px;
  padding: 22px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  background: rgba(232, 184, 109, 0.03);
}
.empty-card h2 { margin: 0 0 8px; font-size: 20px; }
.empty-card p, .empty-card li { color: var(--muted); }
.empty-card code, .hint code { color: var(--brass); }
.letter-head { margin-bottom: 12px; }
.letter-head .who { color: var(--muted); font-size: 12px; }
.codes { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 14px; }
.code-xl {
  font-family: var(--mono);
  font-size: 28px;
  letter-spacing: 0.16em;
  padding: 10px 14px;
  border-radius: 12px;
  background: #16110a;
  border: 1px solid rgba(232,184,109,.35);
  color: var(--brass);
  cursor: pointer;
}
.links a { color: var(--mint); display: block; word-break: break-all; margin: 4px 0; }
.frame-wrap {
  margin-top: 12px;
  border: 1px solid var(--hair);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  min-height: 280px;
}
.frame-wrap iframe { width: 100%; height: 52vh; border: 0; background: #fff; }
.plain { white-space: pre-wrap; color: #d7dde6; font-size: 13px; }

.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  display: grid; place-items: center;
  padding: 20px;
  z-index: 20;
}
.modal[hidden] { display: none; }
.sheet {
  width: min(720px, 100%);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 16px;
}
.sheet header { display: flex; justify-content: space-between; align-items: center; }
.sheet h3 { margin: 0; }
.sheet footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
.hint { color: var(--muted); }
.field { display: grid; gap: 6px; color: var(--muted); margin: 10px 0; }
.oauth-panel {
  min-height: 72px;
  border: 1px dashed var(--hair);
  border-radius: 12px;
  padding: 12px;
  font-family: var(--mono);
}
.user-code { font-size: 28px; letter-spacing: 0.2em; color: var(--brass); }

.toast {
  position: fixed; right: 18px; bottom: 18px;
  background: #1c2212; color: var(--mint);
  border: 1px solid rgba(110,231,183,.3);
  padding: 10px 14px; border-radius: 12px;
  z-index: 30;
}
.toast.bad { background: #2a1414; color: var(--danger); border-color: rgba(255,122,122,.3); }
.toast[hidden] { display: none; }

@media (max-width: 1100px) {
  .workspace { grid-template-columns: 1fr; }
  .accounts-pane { max-height: 280px; }
  .mail-pane { max-height: 360px; }
}