:root {
  --navy: #0F1F3D;
  --mint: #3ECFAA;
  --mint-dim: #2aaa8a;
  --bg: #F0F2F5;
  --text: #1A2B47;
  --text-2: #4A5568;
  --text-3: #8A96A8;
  --card: #FFFFFF;
  --border: #E2E6EC;
  --danger: #e0a050;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--mint-dim); text-decoration: none; }

/* Login */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: var(--card);
  border-radius: 14px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 10px 40px rgba(15,31,61,0.08);
  border-top: 3px solid var(--mint);
}
.login-brand {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}
.login-brand span { color: var(--mint); }
.login-sub { color: var(--text-3); font-size: 0.85rem; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }
.subcard { border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; margin-bottom: 10px; }
.subcard-title { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.subcard-meta { color: var(--text-3); font-size: 0.8rem; }
.section-title { font-weight: 700; font-size: 1rem; margin: 28px 0 12px; color: var(--navy); }
.section-title:first-child { margin-top: 0; }
.form-label { display: block; font-size: 0.8rem; color: var(--text-2); margin-bottom: 6px; }
.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
}
.form-control:focus { outline: none; border-color: var(--mint); }
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 11px 20px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}
.btn-block { width: 100%; }
.btn-primary { background: var(--mint); color: #0f1e33; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-secondary { background: var(--mint); color: #0f1e33; }
.btn-danger { background: rgba(224,160,80,0.15); color: #8a5a20; border: 1px solid var(--danger); }
.error-box { background: rgba(224,160,80,0.12); border-left: 3px solid var(--danger); padding: 10px 12px; border-radius: 6px; font-size: 0.85rem; color: #8a5a20; margin-bottom: 16px; display: none; }

/* App-Layout */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px;
  background: var(--navy);
  color: #fff;
  padding: 24px 0;
  flex-shrink: 0;
}
.sidebar-brand { font-size: 1.2rem; font-weight: 700; padding: 0 24px 24px; }
.sidebar-brand span { color: var(--mint); }
.nav-item {
  display: block;
  padding: 11px 24px;
  color: #b8c2d4;
  font-size: 0.9rem;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: #fff; }
.nav-badge {
  display: inline-block;
  background: #e53e3e;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 6px;
  vertical-align: middle;
}
.nav-item.active { border-left-color: var(--mint); color: #fff; background: rgba(62,207,170,0.08); }
.main { flex: 1; padding: 28px 36px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-title { font-size: 1.3rem; font-weight: 700; color: var(--navy); }
.card {
  background: var(--card);
  border-radius: 12px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--mint);
  margin-bottom: 20px;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.card-title { font-weight: 700; font-size: 0.95rem; }
.card-body { padding: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-left: 3px solid var(--mint); border-radius: 10px; padding: 16px 18px; }
.stat-label { font-size: 0.75rem; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 1.6rem; font-weight: 700; color: var(--navy); margin-top: 4px; }
.badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 6px; }
.toast {
  position: fixed; bottom: 20px; right: 20px; background: var(--navy); color: #fff;
  padding: 12px 18px; border-radius: 8px; font-size: 0.85rem; z-index: 9999;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.toast.error { background: #8a5a20; }

/* ── Webmail-spezifische Ergänzungen ────────────────────── */
.main.mail-main { padding: 20px 24px; display: flex; flex-direction: column; height: 100vh; box-sizing: border-box; }
.mail-layout { display: flex; gap: 16px; flex: 1; min-height: 0; }

.mail-list-col {
  width: 380px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.mail-search { margin-bottom: 12px; }
.mail-search input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.9rem; background: #fff;
}
.mail-list {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  overflow-y: auto; flex: 1;
}
.mail-item {
  display: block; padding: 12px 16px; border-bottom: 1px solid var(--border);
  cursor: pointer; text-decoration: none; color: var(--text);
}
.mail-item:last-child { border-bottom: none; }
.mail-item:hover { background: #F7F9FB; }
.mail-item.active { background: rgba(62,207,170,0.10); border-left: 3px solid var(--mint); padding-left: 13px; }
.mail-item.unread .mail-item-subject { font-weight: 700; }
.mail-item.unread .mail-item-from { font-weight: 700; }
.mail-item-top { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 3px; }
.mail-item-from { font-size: 0.85rem; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
.mail-item-date { font-size: 0.72rem; color: var(--text-3); flex-shrink: 0; }
.mail-item-subject { font-size: 0.85rem; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mail-item-icons { display: inline-flex; gap: 4px; margin-left: 6px; }
.mail-empty-list { padding: 40px 20px; text-align: center; color: var(--text-3); font-size: 0.9rem; }

.mail-view-col {
  flex: 1;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  display: flex; flex-direction: column; min-height: 0; overflow: hidden;
}
.mail-view-empty {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: 0.95rem;
}
.mail-view-header { padding: 18px 22px; border-bottom: 1px solid var(--border); }
.mail-view-subject { font-size: 1.1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.mail-view-meta { font-size: 0.82rem; color: var(--text-2); line-height: 1.6; }
.mail-view-meta b { color: var(--text); }
.mail-view-actions { padding: 12px 22px; border-bottom: 1px solid var(--border); display: flex; gap: 8px; }
.mail-view-actions .btn { padding: 8px 14px; font-size: 0.82rem; }
.mail-view-body { flex: 1; min-height: 0; }
.mail-view-body iframe { width: 100%; height: 100%; border: none; }
.mail-attachments { padding: 12px 22px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 8px; }
.mail-attachment {
  display: flex; align-items: center; gap: 6px; padding: 7px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 0.8rem; color: var(--text); text-decoration: none; background: #F7F9FB;
}
.mail-attachment:hover { border-color: var(--mint); }

.icon-btn {
  background: none; border: none; cursor: pointer; color: var(--text-3); font-size: 1rem;
  padding: 2px 4px; border-radius: 4px;
}
.icon-btn:hover { color: var(--mint-dim); background: rgba(62,207,170,0.1); }
.icon-btn.flagged { color: #e0a050; }

.compose-wrap { max-width: 760px; }
.compose-wrap textarea {
  width: 100%; min-height: 320px; padding: 14px; border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit; font-size: 0.92rem; resize: vertical;
}
.pager { display: flex; gap: 8px; align-items: center; justify-content: center; padding: 10px; font-size: 0.82rem; color: var(--text-3); }

@media (max-width: 900px) {
  .mail-layout { flex-direction: column; }
  .mail-list-col { width: 100%; max-height: 40vh; }
}