:root {
  --bg-primary: #0b1121;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #243049;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #f59e0b;
  --border: rgba(148, 163, 184, 0.08);
  --border-hover: rgba(99, 102, 241, 0.3);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
  --radius: 0.875rem;
  --radius-sm: 0.5rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { color: #a5b4fc; }

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.18); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, 0.3); }

/* ── Navigation ────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 2rem;
  height: 60px;
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-brand span {
  background: linear-gradient(135deg, #818cf8, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-brand:hover { color: var(--text-primary); }

.nav-links {
  display: flex;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.25s ease;
  white-space: nowrap;
  text-decoration: none;
}
.nav-link svg { opacity: 0.6; transition: opacity 0.25s; flex-shrink: 0; }
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.08);
}
.nav-link:hover svg { opacity: 1; }
.nav-link.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(167, 139, 250, 0.15));
  color: #c4b5fd;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
}
.nav-link.active svg { opacity: 1; stroke: #a5b4fc; }

.nav-logout {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  transition: all 0.25s;
  white-space: nowrap;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logout:hover { color: var(--red); background: rgba(239, 68, 68, 0.08); }

/* ── Period selector ───────────────────────────────────────── */
.period-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 2rem 0;
}
.period-presets {
  display: flex;
  gap: 0.25rem;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem;
}
.period-btn {
  padding: 0.4rem 1rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  transition: all 0.25s;
}
.period-btn:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.08);
}
.period-btn.active {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.35);
}

/* ── Date Picker ──────────────────────────────────────────── */
.date-picker {
  position: relative;
}
.date-picker-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.25s;
  white-space: nowrap;
}
.date-picker-toggle svg {
  opacity: 0.5;
  transition: opacity 0.25s;
  flex-shrink: 0;
}
.date-picker-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.06);
}
.date-picker-toggle:hover svg { opacity: 0.8; }
.date-picker--active .date-picker-toggle {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.08);
}
.date-picker--active .date-picker-toggle svg { opacity: 1; stroke: var(--accent-light); }
.date-picker-clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.15);
  font-size: 0.85rem;
  line-height: 1;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  margin-left: 0.1rem;
}
.date-picker-clear:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--red);
}

.date-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  z-index: 100;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0,0,0,0.3);
  padding: 1rem;
  min-width: 280px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.97);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.date-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.date-dropdown-row {
  display: flex;
  gap: 0.75rem;
}
.date-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.date-field-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}
.date-field-input {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-family: inherit;
  outline: none;
  transition: all 0.25s;
  width: 100%;
}
.date-field-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}
.date-field-input::-webkit-calendar-picker-indicator {
  filter: invert(0.6) sepia(1) saturate(3) hue-rotate(200deg);
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.date-field-input::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
}
.date-dropdown-actions {
  margin-top: 0.85rem;
}
.date-dropdown-apply {
  width: 100%;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}
.date-dropdown-apply:hover {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.45);
  transform: translateY(-1px);
}

/* ── Main content ──────────────────────────────────────────── */
.content {
  padding: 1.5rem 2rem 3rem;
  animation: fadeInUp 0.4s ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Page titles ───────────────────────────────────────────── */
.page-header {
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), var(--bg-card) 40%);
  border: 1px solid var(--border);
  border-left: 3px solid;
  border-image: linear-gradient(180deg, var(--accent), #a78bfa) 1;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.page-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.page-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

h1, h2 {
  font-weight: 700;
  color: var(--text-primary);
}
h1 { font-size: 1.4rem; margin-bottom: 1.25rem; }
h2 { font-size: 1rem; margin-bottom: 1rem; color: var(--text-secondary); }

/* ── KPI Cards ─────────────────────────────────────────────── */
.kpi-grid, .kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  box-shadow: var(--shadow-sm);
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  opacity: 0.6;
}
.kpi-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
}
.kpi-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: 0.6rem;
}
.kpi-value { font-size: 1.75rem; font-weight: 700; }
.kpi-delta { font-size: 0.75rem; margin-top: 0.35rem; }
.kpi-delta.positive { color: var(--green); }
.kpi-delta.negative { color: var(--red); }
.kpi-delta.neutral { color: var(--text-secondary); }

/* ── Cards ─────────────────────────────────────────────────── */
.chart-card, .card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.chart-card:hover, .card:hover {
  border-color: rgba(148, 163, 184, 0.12);
}

/* ── Chart grid ────────────────────────────────────────────── */
.chart-grid, .grid-2 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}
.chart-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}
.chart-full { grid-column: 1 / -1; }

/* ── Tables ────────────────────────────────────────────────── */
.data-table, .table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th, .table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 2px solid rgba(148, 163, 184, 0.1);
  background: rgba(11, 17, 33, 0.3);
}
.data-table td, .table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.data-table tr:hover td,
.table tr:hover td {
  background: var(--bg-card-hover);
}
.data-table tbody tr:nth-child(even) td,
.table tbody tr:nth-child(even) td {
  background: rgba(11, 17, 33, 0.15);
}
.data-table tbody tr:nth-child(even):hover td,
.table tbody tr:nth-child(even):hover td {
  background: var(--bg-card-hover);
}

.text-right { text-align: right; }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-yellow { color: var(--yellow); }

/* ── Login ─────────────────────────────────────────────────── */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: radial-gradient(ellipse at top, rgba(99,102,241,0.08), transparent 60%);
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa, #c4b5fd);
}
.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #818cf8, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.form-input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  margin-top: 0.5rem;
}
.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}
.error-msg { color: var(--red); font-size: 0.8rem; text-align: center; margin-bottom: 1rem; }

/* ── Conversations / Chats ─────────────────────────────────── */
.chat-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  align-items: center;
}
.chat-filters .form-input {
  width: auto;
  min-width: 140px;
  padding: 0.45rem 0.75rem;
  font-size: 0.8rem;
}
.chat-filters .search-input {
  flex: 1;
  min-width: 200px;
}

.status-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.status-badge {
  display: inline-block;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.status-badge--lead { background: rgba(34,197,94,0.12); color: var(--green); }
.status-badge--no-lead { background: rgba(148,163,184,0.1); color: var(--text-secondary); }
.status-badge--review { background: rgba(245,158,11,0.12); color: var(--yellow); }
.status-badge--pending { background: rgba(99,102,241,0.12); color: var(--accent-light); }

.confidence-bar {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
}
.confidence-bar__track {
  width: 48px;
  height: 6px;
  background: rgba(148, 163, 184, 0.12);
  border-radius: 3px;
  overflow: hidden;
}
.confidence-bar__fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}
.confidence-bar__fill--high { background: var(--green); }
.confidence-bar__fill--mid { background: var(--yellow); }
.confidence-bar__fill--low { background: var(--red); }

.data-table tr.clickable { cursor: pointer; }
.data-table tr.clickable:hover td { background: var(--bg-card-hover); }

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.pagination button {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.25s;
}
.pagination button:hover:not(:disabled) {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.06);
}
.pagination button:disabled { opacity: 0.35; cursor: default; }

/* ── Chat detail / messenger ───────────────────────────────── */
.chat-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}
.chat-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-height: 70vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 75%;
}
.chat-msg--incoming { align-self: flex-start; }
.chat-msg--outgoing { align-self: flex-end; }
.chat-msg--system { align-self: center; max-width: 90%; }

.chat-sender {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
  font-weight: 500;
}
.chat-msg--outgoing .chat-sender { text-align: right; }

.chat-bubble {
  padding: 0.65rem 0.9rem;
  border-radius: 0.875rem;
  font-size: 0.85rem;
  line-height: 1.45;
  word-break: break-word;
}
.chat-msg--incoming .chat-bubble {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 0.2rem;
}
.chat-msg--outgoing .chat-bubble {
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-bottom-right-radius: 0.2rem;
}
.chat-msg--system .chat-bubble {
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-align: center;
}
.chat-time {
  font-size: 0.65rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}
.chat-msg--outgoing .chat-time { text-align: right; }
.chat-bubble--placeholder {
  font-style: italic;
  opacity: 0.55;
}

.chat-sidebar {
  position: sticky;
  top: 80px;
}
.chat-sidebar .chart-card,
.chat-sidebar .card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.chat-sidebar .info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
}
.chat-sidebar .info-row .label { color: var(--text-secondary); }
.chat-sidebar .info-row .value { font-weight: 500; }

.chat-sidebar .confidence-lg {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.chat-sidebar .confidence-lg .track {
  flex: 1;
  height: 8px;
  background: rgba(148, 163, 184, 0.12);
  border-radius: 4px;
  overflow: hidden;
}
.chat-sidebar .confidence-lg .fill {
  height: 100%;
  border-radius: 4px;
}

.btn-action {
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
  width: 100%;
  border: none;
}
.btn-action--confirm {
  background: linear-gradient(135deg, var(--green), #16a34a);
  color: white;
}
.btn-action--confirm:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-action--reject {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-action--reject:hover { border-color: var(--red); color: var(--red); }
.btn-action--active {
  opacity: 0.6;
  pointer-events: none;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  transition: color 0.2s;
}
.back-link:hover { color: var(--text-primary); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav { padding: 0 1rem; gap: 0.75rem; height: auto; min-height: 56px; flex-wrap: wrap; padding-top: 0.5rem; padding-bottom: 0.5rem; }
  .nav-links { gap: 0.15rem; order: 3; width: 100%; overflow-x: auto; padding-bottom: 0.25rem; justify-content: flex-start; }
  .nav-link span { display: none; }
  .nav-link { padding: 0.45rem 0.65rem; }
  .chart-grid, .grid-2 { grid-template-columns: 1fr; }
  .content { padding: 1rem; }
  .kpi-grid, .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .chat-layout { grid-template-columns: 1fr; }
  .chat-sidebar { position: static; }
  .chat-container { max-height: 50vh; }
}

@media (max-width: 480px) {
  .kpi-grid, .kpi-row { grid-template-columns: 1fr; }
  .nav-brand span { display: none; }
}