:root {
  --bg: #0b1220;
  --card: #111a2d;
  --card2: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --line: rgba(255,255,255,0.08);
  --btn: #2563eb;
  --btn2: #1f2937;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: var(--text); }
code { background: rgba(255,255,255,0.06); padding: 2px 6px; border-radius: 6px; }

.bg { background: radial-gradient(1200px 700px at 30% 10%, #1e3a8a, transparent), var(--bg); min-height: 100vh; }
.center-card { min-height: 100vh; display:flex; align-items:center; justify-content:center; padding: 24px; }
.card { width: 420px; background: rgba(17,26,45,0.92); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: 0 16px 40px rgba(0,0,0,0.4); }

.h1 { margin: 0 0 6px; font-size: 22px; }
.h2 { font-size: 18px; font-weight: 700; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

.form { display: grid; gap: 10px; margin-top: 12px; }
.label { font-size: 12px; color: var(--muted); }
.input, .textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  outline: none;
}
.textarea { min-height: 180px; resize: vertical; }
.input:focus, .textarea:focus { border-color: rgba(37,99,235,0.6); }

.btn {
  background: var(--btn);
  color: #fff;
  border: 0;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
.btn.secondary { background: var(--btn2); border: 1px solid var(--line); }
.btn.small { padding: 7px 10px; font-size: 12px; border-radius: 8px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.alert {
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.35);
  color: #fecaca;
  padding: 10px 12px;
  border-radius: 10px;
  margin-top: 12px;
}

.app { background: var(--bg); min-height: 100vh; }
.topbar {
  height: 56px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(15,23,42,0.7);
  backdrop-filter: blur(10px);
}
.brand { font-weight: 800; letter-spacing: 0.2px; }
.top-actions { display:flex; gap: 8px; align-items:center; }

.layout { display:grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - 56px); }
.sidebar { border-right: 1px solid var(--line); padding: 12px; background: rgba(15,23,42,0.35); }
.sidebar-title { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.folder-list { display:grid; gap: 6px; }
.folder {
  padding: 10px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  display:flex;
  justify-content: space-between;
  gap: 10px;
}
.folder:hover { background: rgba(255,255,255,0.03); border-color: var(--line); }
.folder.active { background: rgba(37,99,235,0.12); border-color: rgba(37,99,235,0.35); }

.main { display:grid; grid-template-columns: 420px 1fr; }
.list { border-right: 1px solid var(--line); display:flex; flex-direction: column; min-height: 100%; }
.listbar { padding: 12px; border-bottom: 1px solid var(--line); display:flex; justify-content: space-between; gap: 10px; align-items:center; }
.search { display:flex; gap: 8px; align-items:center; width: 100%; }
.search .input { flex: 1; }

.messages { padding: 10px; overflow:auto; flex: 1; }
.msg {
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 12px;
  cursor:pointer;
  display:grid;
  gap: 6px;
}
.msg:hover { background: rgba(255,255,255,0.03); border-color: var(--line); }
.msg.active { background: rgba(37,99,235,0.12); border-color: rgba(37,99,235,0.35); }
.msg .top { display:flex; justify-content: space-between; gap: 10px; }
.msg .subj { font-weight: 700; font-size: 13px; }
.msg .meta { color: var(--muted); font-size: 12px; }
.msg .flags { color: var(--muted); font-size: 12px; }

.pager { padding: 10px 12px; border-top: 1px solid var(--line); display:flex; justify-content: space-between; gap: 10px; }

.viewer { display:flex; flex-direction: column; min-height: 100%; }
.viewerbar { padding: 10px 12px; border-bottom: 1px solid var(--line); display:flex; gap: 8px; align-items:center; }
.viewer-actions { display:flex; gap: 8px; flex-wrap: wrap; }
.detail { padding: 16px; overflow:auto; flex: 1; }
.detail h3 { margin: 0 0 6px; font-size: 18px; }
.kv { display:grid; gap: 4px; margin-bottom: 12px; }
.kv div { color: var(--muted); font-size: 12px; }
.pre { white-space: pre-wrap; line-height: 1.4; }

.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.55); display:flex; align-items:center; justify-content:center; padding: 18px; }
.modal.hidden { display:none; }
.modal-card { width: min(720px, 100%); background: rgba(17,26,45,0.95); border: 1px solid var(--line); border-radius: 16px; padding: 16px; box-shadow: 0 18px 50px rgba(0,0,0,0.5); }
.modal-head { display:flex; justify-content: space-between; align-items:center; margin-bottom: 10px; }
.row { display:flex; gap: 10px; align-items:center; }
.suggest {
  position: relative;
  border: 1px solid var(--line);
  background: rgba(17,26,45,0.98);
  border-radius: 10px;
  padding: 6px;
}
.suggest.hidden { display:none; }
.suggest-item {
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.suggest-item:hover { background: rgba(255,255,255,0.04); }
.quote-wrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: rgba(255,255,255,0.02);
}
.quote-head { display:flex; align-items:center; justify-content: space-between; gap: 10px; }
.quote-body {
  margin: 10px 0 0;
  white-space: pre-wrap;
  line-height: 1.35;
  color: var(--muted);
  display: none; /* hidden by default */
}