/* ============================================================
   Investopia - Main Stylesheet
   Clean, modern investment portfolio UI
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #64748b;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --info: #0891b2;
  --info-light: #ecfeff;

  --bg: #f8fafc;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --bg-header: #ffffff;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-light: #cbd5e1;

  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-focus: #93c5fd;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 4px 12px rgba(0,0,0,.06), 0 2px 6px rgba(0,0,0,.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.10), 0 6px 18px rgba(0,0,0,.06);

  --sidebar-width: 240px;
  --header-height: 64px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }

.text-muted { color: var(--text-muted) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-primary { color: var(--primary) !important; }
.text-warning { color: var(--warning) !important; }

.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.fs-sm { font-size: 0.8125rem; }
.fs-xs { font-size: 0.75rem; }

/* --- Layout --- */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  position: fixed;
  left: 0; top: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--header-height);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.page-content {
  flex: 1;
  padding: 1.75rem 1.5rem;
  max-width: 1400px;
  width: 100%;
}

/* --- Sidebar Styles --- */
.sidebar-brand {
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand .brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sidebar-brand .brand-tagline {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sidebar-nav {
  padding: 0.75rem 0;
  flex: 1;
}

.nav-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(255,255,255,0.3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.75rem 1.25rem 0.35rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.55rem 1.25rem;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0;
  transition: all 0.15s;
  margin: 1px 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-item:hover {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.9);
}

.nav-item.active {
  background: var(--primary);
  color: #ffffff;
}

.nav-item .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.85;
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 0.8125rem;
}

/* --- Topbar Elements --- */
.topbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.375rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.topbar-badge {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.topbar-badge:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  overflow: hidden;
}

.avatar-md {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  overflow: hidden;
}

.avatar-lg {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: 1.125rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  padding: 0.875rem 1.25rem;
  border-top: 1px solid var(--border-light);
  background: var(--bg);
}

/* Stat Cards */
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.stat-card:hover {
  box-shadow: var(--shadow);
}

.stat-card .stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.stat-card .stat-value {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-card .stat-value.text-success { color: var(--success); }
.stat-card .stat-value.text-danger { color: var(--danger); }

.stat-card .stat-sub {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.375rem;
}

.stat-card .stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-icon.red { background: var(--danger-light); color: var(--danger); }
.stat-icon.yellow { background: var(--warning-light); color: var(--warning); }
.stat-icon.cyan { background: var(--info-light); color: var(--info); }

/* Portfolio Hero Card */
.portfolio-hero {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #3b82f6 100%);
  border-radius: var(--radius-xl);
  padding: 2rem;
  color: white;
  position: relative;
  overflow: hidden;
}

.portfolio-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.portfolio-hero .hero-label {
  font-size: 0.8rem;
  font-weight: 500;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.portfolio-hero .hero-value {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.portfolio-hero .hero-gain {
  font-size: 0.875rem;
  opacity: 0.85;
}

.portfolio-hero .hero-gain.positive { color: #86efac; }
.portfolio-hero .hero-gain.negative { color: #fca5a5; }

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-metric-label {
  font-size: 0.75rem;
  opacity: 0.65;
  margin-bottom: 0.25rem;
}

.hero-metric-value {
  font-size: 1rem;
  font-weight: 600;
}

/* Asset Cards */
.asset-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 1rem 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  transition: all 0.15s;
  cursor: pointer;
}

.asset-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.asset-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  font-weight: 700;
  flex-shrink: 0;
}

.asset-info { flex: 1; min-width: 0; }
.asset-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.asset-sub {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.asset-values { text-align: right; }
.asset-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}
.asset-gain {
  font-size: 0.775rem;
  font-weight: 500;
}
.asset-gain.positive { color: var(--success); }
.asset-gain.negative { color: var(--danger); }

/* Tab Navigation */
.tab-nav {
  display: flex;
  gap: 0.25rem;
  background: var(--bg);
  border-radius: var(--radius-full);
  padding: 0.25rem;
  border: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

.tab-btn:hover { color: var(--text-primary); }

.tab-btn.active {
  background: var(--bg-white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* --- Tables --- */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

table.data-table thead th {
  background: var(--bg);
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

table.data-table tbody td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  vertical-align: middle;
}

table.data-table tbody tr:last-child td { border-bottom: none; }

table.data-table tbody tr:hover td {
  background: var(--bg);
}

/* --- Forms --- */
.form-group {
  margin-bottom: 1.125rem;
}

.form-label {
  display: block;
  font-size: 0.8375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.875rem;
  background: var(--bg-white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--text-primary);
  font-family: var(--font);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  -webkit-appearance: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
}

.form-control::placeholder { color: var(--text-light); }
.form-control.is-invalid { border-color: var(--danger); }
.form-control.is-valid { border-color: var(--success); }

.form-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.form-error {
  font-size: 0.775rem;
  color: var(--danger);
  margin-top: 0.3rem;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
  cursor: pointer;
}

textarea.form-control { resize: vertical; min-height: 80px; }

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.form-check-input {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
  accent-color: var(--primary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.55rem 1.125rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }

.btn-secondary {
  background: var(--bg-white);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

.btn-success {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}
.btn-success:hover { background: #15803d; color: #fff; }

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn-danger:hover { background: #b91c1c; color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--bg); color: var(--text-primary); }

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-secondary { background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border); }
.badge-info { background: var(--info-light); color: var(--info); }

/* --- Charts --- */
.chart-container {
  position: relative;
  width: 100%;
}

.chart-container canvas { width: 100% !important; }

/* --- Page Header --- */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.page-header-left .page-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
}

.page-header-left .page-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* --- Search & Filter Bar --- */
.filter-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 180px;
}

.search-input-wrap .search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input-wrap input {
  padding-left: 2.25rem;
}

/* --- Gain/Loss Indicator --- */
.gain { color: var(--success); }
.loss { color: var(--danger); }

.gain::before { content: '▲ '; font-size: 0.7em; }
.loss::before { content: '▼ '; font-size: 0.7em; }

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.empty-state p {
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

/* --- Alert / Messages --- */
.alert {
  padding: 0.875rem 1.125rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  margin-bottom: 1rem;
}

.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #bbf7d0; }
.alert-danger { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: var(--warning); border: 1px solid #fde68a; }
.alert-info { background: var(--info-light); color: var(--info); border: 1px solid #a5f3fc; }

.alert .alert-close {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.6;
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--text-primary); font-weight: 500; }

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  justify-content: center;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.pagination .page-link {
  padding: 0.4rem 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-white);
  transition: all 0.15s;
  cursor: pointer;
}

.pagination .page-link:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination .page-link.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.pagination .page-link.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* --- Divider --- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.25rem 0;
}

/* --- Grid Helpers --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.25rem; }

/* --- Ownership Tree --- */
.ownership-tree ul {
  list-style: none;
  padding-left: 1.5rem;
  border-left: 2px dashed var(--border);
  margin-left: 0.75rem;
}

.ownership-tree li {
  position: relative;
  padding: 0.4rem 0;
}

.ownership-tree li::before {
  content: '';
  position: absolute;
  left: -1.5rem;
  top: 50%;
  width: 1rem;
  height: 2px;
  background: var(--border);
}

.tree-node {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8375rem;
  border: 1px solid var(--border);
  background: var(--bg-white);
  transition: all 0.15s;
}

.tree-node:hover { border-color: var(--primary); }
.tree-node.shareholder { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.tree-node.company { background: var(--bg-white); }
.tree-node.circular { background: var(--danger-light); border-color: var(--danger); color: var(--danger); }

.tree-pct {
  font-size: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.125rem 0.5rem;
  color: var(--text-secondary);
}

/* --- Graph Container --- */
#ownership-graph {
  width: 100%;
  height: 520px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg);
  overflow: hidden;
}

/* --- Auth Pages --- */
.auth-layout {
  min-height: 100vh;
  background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-logo .logo-mark {
  width: 52px;
  height: 52px;
  background: var(--primary);
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.auth-logo h1 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.auth-logo p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- Profile Page --- */
.profile-header {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: white;
  margin-bottom: 1.5rem;
}

.profile-header .avatar-xl {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  flex-shrink: 0;
  border: 3px solid rgba(255,255,255,0.3);
}

/* --- Misc Utilities --- */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.gap-lg { gap: 1.5rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.w-full { width: 100%; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.nowrap { white-space: nowrap; }
.overflow-hidden { overflow: hidden; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Number formatting helpers */
.num { font-variant-numeric: tabular-nums; }
.currency::before { content: '₹ '; font-size: 0.8em; opacity: 0.7; }

/* --- Skeleton Loading --- */
.skeleton {
  background: linear-gradient(90deg, var(--bg) 25%, var(--border-light) 50%, var(--bg) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Mobile Bottom Nav --- */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0; right: 0;
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  z-index: 200;
  padding: 0.5rem 0 calc(0.5rem + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
}

.mobile-nav-items {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.25rem 0.75rem;
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 500;
  transition: color 0.15s;
  text-decoration: none;
  min-width: 56px;
}

.mobile-nav-item:hover, .mobile-nav-item.active {
  color: var(--primary);
}

.mobile-nav-item svg {
  width: 22px;
  height: 22px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }

  .sidebar {
    transform: translateX(-100%);
    width: 240px;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .main-content { margin-left: 0; }

  .topbar-toggle { display: flex; }

  .page-content { padding: 1rem; padding-bottom: 5rem; }

  .mobile-nav { display: block; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .portfolio-hero { padding: 1.5rem; }
  .portfolio-hero .hero-value { font-size: 1.75rem; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }

  .auth-card { padding: 1.75rem 1.25rem; }

  .page-header { flex-direction: column; align-items: flex-start; }
  .page-header-actions { width: 100%; }

  table.data-table { font-size: 0.8rem; }
  table.data-table thead th, table.data-table tbody td {
    padding: 0.625rem 0.75rem;
  }

  .filter-bar { flex-direction: column; align-items: stretch; }
  .search-input-wrap { min-width: unset; }

  #ownership-graph { height: 350px; }

  .profile-header { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .stat-card .stat-value { font-size: 1.375rem; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .auth-card { border-radius: var(--radius-lg); }
}

/* --- Sidebar Overlay (mobile) --- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 99;
}
.sidebar-overlay.active { display: block; }

/* --- Dropdown --- */
.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  min-width: 180px;
  z-index: 300;
  overflow: hidden;
  display: none;
}
.dropdown-menu.open { display: block; }
.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.1s;
  text-decoration: none;
}
.dropdown-item:hover { background: var(--bg); }
.dropdown-divider { border-top: 1px solid var(--border); margin: 0.25rem 0; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }