/* ─── Theme tokens ────────────────────────────────────────────────────────── */
:root {
  --bg: #0d1117;
  --panel: #151b23;
  --panel-soft: #1b2430;
  --panel-strong: rgba(21, 27, 35, 0.9);
  --text: #f5f7fb;
  --muted: #9ba7b6;
  --accent: #4A9098;
  --accent-soft: rgba(74, 144, 152, 0.18);
  --accent-strong: #5fb1bb;
  --border: rgba(255, 255, 255, 0.08);
  --danger: #f87171;
  --success: #22c55e;

  /* Bootstrap overrides */
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-primary: var(--accent);
  --bs-primary-rgb: 74, 144, 152;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1f2937, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  zoom: 80%;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text); }
h2 { font-size: 1.4rem; margin: 0 0 1rem; }
p { color: var(--text); }
.muted, .text-muted { color: var(--muted) !important; }

/* ─── Sidebar shell ───────────────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 260px;
  border-right: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.75);
  backdrop-filter: blur(18px);
  padding: 1.5rem 1.25rem;
  display: flex; flex-direction: column;
  overflow: hidden;
  z-index: 300;
}
.sidebar .hamburger { display: none; }

.brand {
  display: flex; gap: 0.8rem; align-items: center;
  margin-bottom: 2rem;
}
.brand-mark {
  width: 46px; height: 46px; border-radius: 16px;
  background: var(--accent-soft); color: var(--accent-strong);
  display: grid; place-items: center;
  font-size: 1.3rem; font-weight: 800;
  text-decoration: none; flex-shrink: 0;
}
.brand strong { font-size: 0.95rem; }
.brand span { display: block; color: var(--muted); font-size: 0.8rem; }

nav { flex: 1; display: grid; gap: 0.4rem; align-content: start; }
nav a {
  padding: 0.75rem 1rem; color: var(--muted);
  border-radius: 14px; font-size: 0.95rem;
  transition: background-color 0.15s, color 0.15s;
}
nav a:hover { background: var(--panel-soft); color: var(--text); }
nav a.nav-active { background: var(--accent-soft); color: var(--accent-strong); }

.nav-logout {
  display: block; padding: 0.8rem 1rem; border-radius: 14px;
  color: var(--muted); font-size: 0.95rem; margin-top: 0.5rem;
}
.nav-logout:hover { background: var(--panel-soft); color: var(--danger); }

/* Hamburger (portrait phone only) */
.hamburger {
  display: flex; flex-direction: column; justify-content: space-between;
  width: 28px; height: 20px; background: none; border: none;
  cursor: pointer; padding: 0; flex-shrink: 0;
}
.hamburger span {
  display: block; height: 2px; width: 100%;
  background: var(--text); border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

.nav-overlay {
  display: none; position: fixed; inset: 0; z-index: 250;
  background: rgba(0,0,0,0.5);
}
.nav-overlay.open { display: block; }

/* Mobile header (only used on portrait phones) */
.mobile-header { display: none; }

/* ─── Content area ────────────────────────────────────────────────────────── */
.content {
  margin-left: 260px;
  padding: 2rem;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Logged-out pages (e.g. login) — no sidebar/header rendered */
body.no-sidebar .content {
  margin-left: 0;
  padding: 2rem 1.5rem;
}

.brand-strip {
  display: flex; align-items: center; justify-content: center;
  gap: 2rem;
  margin: -2rem -2rem 1.5rem calc(-260px - 2rem);
  padding: 1.75rem 2rem 1.5rem calc(260px + 2rem);
  border-bottom: 1px solid var(--border);
}
.brand-strip-logo { height: 60px; width: auto; }
.brand-strip-logo--partner { opacity: 0.9; }

/* TGG placeholder — swap for a real logo image when available */
.brand-strip-placeholder {
  height: 60px;
  padding: 0 1.5rem;
  background: var(--panel-soft);
  border: 1px dashed var(--border);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.flash-stack { margin-bottom: 1rem; }

/* ─── Panels / cards ──────────────────────────────────────────────────────── */
.panel, #content > .card, .admin-container, .upload-section, #mapping-section,
#chatContainer, #threadList, #messageDisplayContainer,
#testBotContainer {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.25rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.22);
}

/* ─── Bootstrap component overrides ───────────────────────────────────────── */
.container, .container-fluid { color: var(--text); }

.btn, .btn-primary, .btn-secondary {
  background: linear-gradient(180deg, #243041, #182231);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 14px;
  padding: 0.6rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  transition: border-color 0.15s, background 0.15s;
}
.btn:hover, .btn-primary:hover, .btn-secondary:hover {
  border-color: var(--accent);
  background: linear-gradient(180deg, #2a3849, #1d2735);
  color: var(--text);
}
.btn-primary, #login-button, .admin-button, .mapping-submit-button, .upload-button, .custom-file-upload {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #fff;
  border-radius: 14px;
  padding: 0.65rem 1.4rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-align: center;
  display: inline-block;
  transition: background 0.15s, border-color 0.15s;
}
.btn-primary:hover, #login-button:hover, .admin-button:hover,
.mapping-submit-button:hover, .upload-button:hover, .custom-file-upload:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #fff;
}
.upload-button.show { display: inline-block; }
.upload-button, .mapping-submit-button { min-width: 180px; margin-top: 0.5rem; }
.custom-file-upload {
  min-width: 220px;
  background: var(--panel-soft);
  border: 1px dashed var(--border);
  color: var(--muted);
}
.custom-file-upload:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
}

/* Forms */
.form-control, .form-select, input[type="text"], input[type="email"],
input[type="password"], input[type="search"], textarea, select,
.login-input, .admin-input, .upload-input, .search-bar {
  background: #0f1621;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.65rem 0.9rem;
}
.form-control:focus, .form-select:focus, input:focus, textarea:focus, select:focus,
.login-input:focus, .admin-input:focus, .upload-input:focus, .search-bar:focus {
  background: #0f1621; color: var(--text);
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-control::placeholder, input::placeholder, textarea::placeholder { color: var(--muted); }
.form-label, .form-check-label { color: var(--text); }
.form-check-input {
  background-color: #0f1621;
  border-color: var(--border);
}
.form-check-input:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}

/* Tables */
.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--text);
  --bs-table-striped-bg: rgba(255,255,255,0.03);
  --bs-table-striped-color: var(--text);
  --bs-table-hover-bg: var(--accent-soft);
  --bs-table-hover-color: var(--text);
  --bs-table-border-color: var(--border);
  color: var(--text);
}
.table thead th {
  background: var(--panel-soft);
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.table tbody tr:nth-of-type(odd)  { background: rgba(255,255,255,0.02); }
.table tbody tr:nth-of-type(even) { background: transparent; }
.table tbody tr:hover { background: var(--accent-soft); color: var(--text); }
.table th, .table td {
  vertical-align: middle; text-align: center;
  font-size: 0.85rem;
  border-color: var(--border);
}

/* List groups (thread list, etc.) */
.list-group-item {
  cursor: pointer;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 1rem;
  transition: background-color 0.15s;
}
.list-group-item:hover { background: var(--accent-soft); color: var(--text); }
.active-thread, .list-group-item.active {
  background: var(--accent-soft) !important;
  color: var(--accent-strong) !important;
  border-color: transparent;
}

/* Section headers */
.section-header h2, .conversion-stats-header, .admin-container h2,
.upload-section h2, #mapping-section h3 {
  color: var(--accent-strong);
  background: transparent;
  box-shadow: none;
  text-align: left;
  padding: 0 0 0.5rem;
}

/* ─── Conversations page ──────────────────────────────────────────────────── */
#chatContainer {
  display: flex; gap: 1rem;
  padding: 1rem;
}
#threadList, #messageDisplayContainer {
  background: rgba(15, 22, 33, 0.6);
  border-radius: 18px;
}
#threadList { height: 500px; overflow-y: auto; flex-grow: 1; padding: 0.75rem; }
#messageDisplayContainer { height: calc(100vh - 220px); flex-grow: 2; padding: 0.75rem; }
#messageDisplay { flex: 2; overflow-y: auto; height: 100%; }

/* Chat bubbles */
.message {
  padding: 0.7rem 1rem;
  border-radius: 16px;
  margin: 0.35rem 0;
  max-width: 75%;
  word-break: break-word;
  line-height: 1.4;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
/* From us → right side, teal */
.message.from-client {
  background: var(--accent);
  color: #fff;
}
/* From customer → left side, panel-soft grey */
.message.from-customer {
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--border);
}
.timestamp {
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0.15rem 0 0.5rem;
}
.date-header {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  margin: 1rem 0 0.5rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
#exportChatBtn {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 14px;
  padding: 0.5rem 1.2rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s;
}
#exportChatBtn:hover { background: var(--accent-strong); }

/* ─── Test Bot ────────────────────────────────────────────────────────────── */
#testBotContainer {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex !important;
  flex-direction: column;
  align-items: stretch;
  gap: 2rem;
  padding: 1.75rem;
}
#testBotChatbox {
  width: 100%;
  height: 520px;
  overflow-y: auto;
  padding: 1.25rem;
  background: rgba(15, 22, 33, 0.6);
  border: 1px solid var(--border);
  border-radius: 14px;
  display: flex; flex-direction: column; gap: 1.1rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.18) rgba(255,255,255,0.04);
}
#testBotChatbox .message {
  padding: 0.7rem 1rem;
  max-width: 75%;
  margin: 0;
  border-radius: 16px;
  word-break: break-word;
  line-height: 1.4;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
/* Assistant → left side, panel-soft */
#testBotChatbox .assistant-message {
  align-self: flex-start;
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--border);
}
/* User input (tester) → right side, teal */
#testBotChatbox .user-message {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
}
#testBotUserInput {
  width: 100%;
  margin: 0;
  padding: 0.7rem 1rem;
  border-radius: 14px;
  font-size: 0.95rem;
}
#testBotSendButton {
  align-self: flex-end;
  width: auto;
  margin: 0;
  padding: 0.6rem 2rem;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 14px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s;
}
#testBotSendButton:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

/* ─── Login page ──────────────────────────────────────────────────────────── */
.auth-shell {
  min-height: calc(100vh - 4rem);
  justify-content: center;
}
.auth-logo {
  height: 52px;
  width: auto;
  filter: drop-shadow(0 0 20px rgba(74, 144, 152, 0.3));
}
.auth-plate {
  width: 100%;
  max-width: 440px;
}
.login-card {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.32);
}
.login-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
}
.login-subtitle { font-size: 0.85rem; color: var(--muted); }
.login-group { margin-bottom: 1rem; }
.login-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.login-divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 1.25rem 0;
}
.login-help { color: var(--muted); }
.link-muted { color: var(--muted); }
.link-muted:hover { color: var(--accent-strong); }
.login-legal-links { color: var(--muted); }
.login-legal-links a { color: var(--muted); }
.login-legal-links a:hover { color: var(--accent-strong); }
#login-button { font-weight: 600; }
.form-check-label { margin-left: 0.5rem; }

/* ─── Admin / Upload ──────────────────────────────────────────────────────── */
.admin-container, .upload-section, #mapping-section {
  width: 100%; max-width: 640px; margin: 1rem auto;
}
.upload-section { display: flex; flex-direction: column; align-items: center; }
.upload-form { display: flex; flex-direction: column; width: 100%; align-items: center; gap: 0.75rem; }
.upload-button { display: none; }
.upload-button.show { display: inline-block; }

#message-box {
  margin: 1.25rem auto 0;
  max-width: 520px;
  width: 100%;
  text-align: center;
}
#mapping-form {
  display: flex; flex-direction: column; align-items: center;
}
#mapping-form .mapping-submit-button {
  display: block;
  margin: 1.25rem auto 0;
}
.admin-divider { margin: 2rem 0; border: 0; border-top: 1px solid var(--border); }
.admin-form-check { display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; gap: 0.5rem; }
#mapping-fields label { display: block; text-align: center; margin: 0.5rem 0 0.25rem; color: var(--muted); }
#mapping-fields select, #mapping-fields .form-control {
  width: 100%;
  max-width: 480px;
  margin: 0 auto 1rem;
}


/* ─── Uniform page title (used across all pages) ──────────────────────────── */
h1.page-title, h2.page-title, .page-title {
  margin: 0 0 1.5rem;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-strong);
  text-align: left;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

/* ─── Conversion Stats dashboard ──────────────────────────────────────────── */
.stats-hero {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
  margin-bottom: 1.5rem;
}
.stats-hero .page-title { margin-bottom: 0; }
.date-filter {
  display: flex; align-items: center; gap: 0.6rem;
  flex-wrap: wrap;
}
.date-filter label {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--muted); font-size: 0.85rem;
  margin: 0;
}
.date-filter input[type="date"] {
  background: #0f1621;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.45rem 0.65rem;
  font-family: inherit;
  color-scheme: dark;
}
.date-filter button {
  border-radius: 12px !important;
  padding: 0.5rem 1.1rem !important;
  font-size: 0.9rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.metric-card {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.22);
}
.metric-value {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: var(--accent-strong);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.metric-label {
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.metric-sub {
  margin-top: 0.2rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.chart-grid .panel {
  position: relative;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem;
  height: 440px;
  overflow: hidden;
}
.chart-grid .panel h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--text);
}
.chart-grid .chart-wrap {
  position: relative;
  height: calc(100% - 2.25rem);
}
.chart-grid canvas {
  position: absolute !important;
  top: 0; left: 0;
  width: 100% !important;
  height: 100% !important;
}
/* Fallback if chart-wrap isn't present */
.chart-grid .panel > canvas {
  top: 3rem;
  left: 1.25rem; right: 1.25rem; bottom: 1.25rem;
  width: auto !important; height: auto !important;
}

@media (max-width: 900px) {
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chart-grid { grid-template-columns: 1fr; }
}
@media (max-width: 500px) {
  .metric-grid { grid-template-columns: 1fr; }
}

/* ─── Bootstrap cards ─────────────────────────────────────────────────────── */
.card {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 18px;
  color: var(--text);
  overflow: hidden;
}
.card-header {
  background: var(--panel-soft);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  padding: 0.85rem 1.25rem;
}
.card-header h1, .card-header h2, .card-header h3, .card-header h4, .card-header h5 {
  color: var(--accent-strong);
  margin: 0;
  font-size: 1.05rem;
}
.card-body {
  background: transparent;
  color: var(--text);
  padding: 1.25rem;
}

/* ─── Modals ──────────────────────────────────────────────────────────────── */
.modal-content {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 18px;
}
.modal-header { border-bottom: 1px solid var(--border); }
.modal-header h5 { color: var(--accent-strong); margin: 0; }
.modal-footer { border-top: 1px solid var(--border); }
.modal-close, .btn-close {
  background: none; border: none; color: var(--muted);
  font-size: 1.25rem; cursor: pointer;
  filter: invert(1) grayscale(1) brightness(2);
}

/* ─── Alerts ──────────────────────────────────────────────────────────────── */
.alert {
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
  color: var(--text);
}
.alert-success { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.4); color: #86efac; }
.alert-danger,
.alert-error { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.4); color: #fca5a5; }
.alert-info { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-strong); }
.message-success { background: rgba(34, 197, 94, 0.12); color: #86efac; padding: 0.6rem 0.9rem; border-radius: 10px; }
.message-error   { background: rgba(248, 113, 113, 0.12); color: #fca5a5; padding: 0.6rem 0.9rem; border-radius: 10px; }

/* ─── Scrollbars ──────────────────────────────────────────────────────────── */
#messageDisplay::-webkit-scrollbar,
#threadList::-webkit-scrollbar,
#contactsContainer::-webkit-scrollbar,
#contactsTable::-webkit-scrollbar { width: 10px; }
#messageDisplay::-webkit-scrollbar-thumb,
#threadList::-webkit-scrollbar-thumb,
#contactsContainer::-webkit-scrollbar-thumb,
#contactsTable::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.18);
  border-radius: 10px;
}
#messageDisplay::-webkit-scrollbar-track,
#threadList::-webkit-scrollbar-track,
#contactsContainer::-webkit-scrollbar-track,
#contactsTable::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
}
#messageDisplay, #threadList, #contactsContainer, #contactsTable {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.18) rgba(255,255,255,0.04);
}

#contactsContainer {
  margin-top: 1rem;
  overflow-y: auto;
  height: 500px;
}

/* ─── Contacts page ───────────────────────────────────────────────────────── */
#contactsContainer {
  height: auto;
  padding: 1.5rem !important;
  border-radius: 22px;
  overflow: visible;
}
#contactsContainer h2 {
  font-size: 1.35rem;
  color: var(--accent-strong);
  margin: 0 0 1.25rem;
  text-align: left;
}

/* Search + filter rows */
#contactsContainer #searchBox,
#contactsContainer #statusFilter,
#contactsContainer #searchDateRange {
  border-radius: 14px !important;
}
#searchDateRange { max-width: 240px; }
#dateSearchIcon {
  width: 36px !important; height: 36px !important;
  padding: 6px;
  border-radius: 10px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  transition: background 0.15s, filter 0.15s;
}
#dateSearchIcon:hover {
  background: var(--accent-soft);
  filter: invert(0.85);
}

/* Inline labels with checkboxes in the filter row */
#contactsContainer > div > label {
  display: inline-flex !important;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0 0.75rem !important;
  white-space: nowrap;
  color: var(--text);
  text-align: left !important;
  cursor: pointer;
  font-size: 0.9rem;
  user-select: none;
}
#contactsContainer input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}

/* Filter / action buttons */
#filterButton, #exportCsvButton, #startSmsButton {
  border-radius: 14px !important;
  padding: 0.55rem 1.2rem !important;
  font-size: 0.9rem;
  white-space: nowrap;
}
#recordCount {
  color: var(--muted);
  font-size: 0.9rem;
  margin-left: 0.5rem;
}

/* Contacts table */
.contacts-table-scroll {
  max-height: 60vh;
  overflow-y: auto;
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
  margin-top: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.18) rgba(255,255,255,0.04);
}
.contacts-table-scroll::-webkit-scrollbar { width: 10px; height: 10px; }
.contacts-table-scroll::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.18); border-radius: 10px;
}
.contacts-table-scroll::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.04);
}
#contactsTable {
  margin: 0;
  width: 100%;
}
#contactsTable thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  font-size: 0.72rem !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.85rem 0.5rem !important;
  color: var(--muted) !important;
  background: var(--panel-soft) !important;
  text-align: center;
  vertical-align: middle;
  font-weight: 600;
}
#contactsTable thead th label {
  font-size: 0.7rem;
  color: var(--muted);
  margin: 0 0.4rem 0 0 !important;
  cursor: pointer;
}
#contactsTable thead th input[type="checkbox"] { margin: 0.3rem 0.4rem 0 0; }
#contactsTable tbody td {
  font-size: 0.85rem !important;
  padding: 0.75rem 0.5rem !important;
  border-bottom: 1px solid var(--border) !important;
  vertical-align: middle;
}
#contactsTable tbody tr { transition: background 0.15s; }
.table-responsive { overflow-x: auto; }
.search-bar { margin-bottom: 0.75rem; }

.loading-image { width: 60px; height: 40px; }

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .content { padding: 1rem; }
  #chatContainer { flex-direction: column; }
  #threadList, #messageDisplayContainer { height: auto; min-height: 320px; }
  .brand-strip { gap: 0.75rem; }
  .brand-strip-logo { height: 28px; }
  .brand-strip-placeholder { height: 28px; font-size: 0.9rem; padding: 0 0.75rem; }
}

/* Portrait phone: full-width top bar + off-screen sidebar */
@media (max-width: 600px) {
  .mobile-header {
    display: flex; align-items: center; justify-content: space-between;
    position: fixed; top: 0; left: 0; right: 0; z-index: 200;
    padding: 0.75rem 1rem;
    background: rgba(13, 17, 23, 0.95); backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
  }
  .mobile-header .brand { margin-bottom: 0; }
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .content { margin-left: 0; padding: 1rem; padding-top: 5rem; }
  .brand-strip {
    margin: -1rem -1rem 1rem;
    padding: 0.5rem 1rem 1rem;
  }
}