:root {
  --ink: #14171f;
  --paper: #f7f4ef;
  --muted: #6d7480;
  --line: #e4ded3;
  --brand: #b2252a;
  --brand-dark: #83191e;
  --panel: #ffffff;
  --sidebar: #171a21;
}

[data-theme="dark"] {
  --ink: #f3f5f7;
  --paper: #101217;
  --muted: #a5adba;
  --line: #2a2f3a;
  --panel: #171b23;
  --sidebar: #0b0d11;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #fffaf2, var(--paper));
}

.auth-card, .panel, .table-wrap {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.app-shell {
  min-height: 100vh;
  display: flex;
}

.sidebar {
  width: 264px;
  background: var(--sidebar);
  color: #f8f8f8;
  padding: 24px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand-mark {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: .2px;
  font-size: 1.3rem;
}

.sidebar a {
  color: #d8dce3;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  margin: 4px 0;
}

.sidebar a:hover, .sidebar a.active {
  background: rgba(255,255,255,.09);
  color: #fff;
}

.content {
  flex: 1;
  padding: 28px;
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.kpi {
  border-left: 4px solid var(--brand);
}

.btn-brand {
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand-dark);
  --bs-btn-hover-border-color: var(--brand-dark);
  color: #fff;
}

.article-title {
  font-family: Georgia, "Times New Roman", serif;
}

.badge-soft {
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  color: var(--brand);
  border: 1px solid color-mix(in srgb, var(--brand) 24%, transparent);
}

.messenger-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
}

.messenger-roster,
.messenger-window {
  overflow: hidden;
  border: 1px solid #88a4d7;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.7);
  background: linear-gradient(180deg, #f6fbff 0%, #d8eaff 100%);
}

.messenger-roster-head,
.messenger-window-head {
  padding: 12px 14px;
  color: #083d8c;
  font-weight: 700;
  background: linear-gradient(180deg, #d7ebff 0%, #8fc0ff 45%, #5e9cff 100%);
  border-bottom: 1px solid #6c92c8;
}

.messenger-list {
  max-height: 68vh;
  overflow: auto;
  background:
    linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.2)),
    radial-gradient(circle at top right, rgba(255,255,255,.75), transparent 30%);
}

.messenger-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: #11335f;
  text-decoration: none;
  border-bottom: 1px solid rgba(115, 149, 199, .25);
}

.messenger-contact.is-active,
.messenger-contact:hover {
  background: rgba(82, 143, 245, .18);
}

.messenger-contact small,
.messenger-status {
  display: block;
  color: #285581;
}

.presence-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  display: inline-block;
  box-shadow: 0 0 0 2px rgba(255,255,255,.6);
}

.presence-dot.online {
  background: #2e88ff;
}

.presence-dot.offline {
  background: #d64545;
}

.messenger-messages {
  min-height: 52vh;
  max-height: 52vh;
  overflow: auto;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.7), rgba(255,255,255,.45)),
    radial-gradient(circle at top left, rgba(255,255,255,.95), transparent 35%);
}

.messenger-error {
  margin: 10px 14px 0;
  padding: 8px 10px;
  border: 1px solid #d4a7a7;
  color: #8f1c1c;
  background: #fff0f0;
  border-radius: 6px;
}

.chat-bubble {
  max-width: min(72%, 560px);
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #8eb3e8;
  background: linear-gradient(180deg, #ffffff, #dcedff);
  color: #14375f;
}

.chat-bubble.mine {
  margin-left: auto;
  background: linear-gradient(180deg, #fff9da, #ffe38f);
  border-color: #d6b646;
}

.chat-bubble small {
  display: block;
  margin-top: 6px;
  color: #5b7194;
}

.messenger-compose {
  display: grid;
  grid-template-columns: 1fr 110px;
  gap: 10px;
  padding: 14px;
  background: linear-gradient(180deg, #d7ebff, #bbd9fb);
  border-top: 1px solid #7ca5de;
}

.vintage-input {
  resize: none;
  border: 1px solid #79a1d6;
  background: #fffef8;
}

.messenger-send {
  border: 1px solid #5f87bd;
  color: #083d8c;
  background: linear-gradient(180deg, #ffffff 0%, #dceeff 55%, #bdd7fb 100%);
  border-radius: 6px;
  font-weight: 700;
}

.vintage-table {
  background: linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.45));
}

@media (max-width: 860px) {
  .app-shell { display: block; }
  .sidebar {
    position: relative;
    height: auto;
    width: 100%;
  }
  .content { padding: 18px; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .messenger-shell { grid-template-columns: 1fr; }
  .messenger-messages { min-height: 38vh; max-height: 38vh; }
  .messenger-compose { grid-template-columns: 1fr; }
}