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

:root {
  --primary: #0073aa;
  --primary-dark: #005a87;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107;
  /* Light mode (default) */
  --text: #1a1a2e;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --bg: #f8f9fa;
  --bg-alt: #f0f2f5;
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --sidebar-bg: #1a1a2e;
  --sidebar-text: #c9d1d9;
  --sidebar-active: #ffffff;
  --topbar-bg: #ffffff;
  --code-bg: #f8f9fa;
}

[data-theme="dark"] {
  --text: #e8edf2;
  --text-muted: #8b98aa;
  --border: #3a4a5c;
  /* 3-level depth — clear visual separation between layers:
     page bg (darkest) → content area (mid) → cards (clearly lighter) */
  --bg: #0d1117;
  --bg-alt: #141a23;
  --card-bg: #2a3344;
  --input-bg: #1a2233;
  --sidebar-bg: #0d1117;
  --sidebar-text: #8b98aa;
  --sidebar-active: #ffffff;
  --topbar-bg: #1a2233;
  --code-bg: #0d1117;
}

/* Theme toggle button */
.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: 20px;
  color: var(--text-muted); cursor: pointer; font-size: 1rem;
  padding: 4px 10px; display: flex; align-items: center; gap: 6px;
  transition: all 0.2s; white-space: nowrap; flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header { background: var(--card-bg); border-bottom: 1px solid var(--border); padding: 0 0; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-size: 1.2rem; font-weight: 700; color: var(--primary); }
.main-nav { display: flex; gap: 24px; align-items: center; }
.main-nav a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
.main-nav a.active, .main-nav a:hover { color: var(--primary); }
.main-nav .nav-logout { color: var(--danger); }

/* Main content */
.main-content { padding: 32px 0; }
.site-footer { border-top: 1px solid var(--border); padding: 16px 0; text-align: center; color: var(--text-muted); font-size: 0.85rem; margin-top: 32px; }

/* Auth */
.auth-layout { background: var(--bg); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.auth-wrapper { display: flex; align-items: center; justify-content: center; width: 100%; padding: 24px; }
.auth-box { background: var(--card-bg); border-radius: 10px; box-shadow: 0 4px 24px rgba(0,0,0,0.08); padding: 40px; width: 100%; max-width: 420px; }
.auth-wide .auth-box { max-width: 560px; }
.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-logo h1, .auth-logo h2 { font-size: 1.6rem; color: var(--primary); margin-bottom: 4px; }
.auth-logo p { color: var(--text-muted); font-size: 0.95rem; }
.auth-site-url { margin-top: 4px; font-size: 0.78rem; }
.auth-site-url a { color: var(--text-muted); text-decoration: none; opacity: 0.8; }
.auth-site-url a:hover { opacity: 1; text-decoration: underline; }
.program-logo { max-height: 80px; max-width: 260px; display: block; margin: 0 auto 8px; object-fit: contain; }
.auth-links { margin-top: 20px; text-align: center; font-size: 0.9rem; color: var(--text-muted); }
.auth-links a { color: var(--primary); text-decoration: none; }
.auth-links .divider { margin: 0 8px; }

/* Forms */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.form-group label small { font-weight: 400; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.95rem; color: var(--text); background: var(--input-bg); transition: border-color 0.2s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,115,170,0.12); }
.form-group input[readonly] { background: var(--bg); cursor: default; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }
.auth-form .form-group { margin-bottom: 20px; }

/* Buttons */
.btn { display: inline-block; padding: 10px 20px; border-radius: 6px; font-size: 0.9rem; font-weight: 600; cursor: pointer; text-decoration: none; border: none; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: #fd7e14; color: #fff; border-color: #e96c02; }
.btn-full { width: 100%; text-align: center; }
.btn-sm { padding: 7px 12px; font-size: 0.82rem; min-height: 36px; }

/* Cards */
.card { background: var(--card-bg); border-radius: 8px; border: 1px solid var(--border); padding: 24px; margin-bottom: 20px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-header h3 { margin: 0; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 20px; text-align: center; }
.stat-card.highlight { border-color: var(--warning); background: #fff8e1; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; }

/* Dashboard */
.dashboard-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.dashboard-header h2 { font-size: 1.5rem; }
.referral-card { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; }
.referral-card h3 { color: #fff; margin-bottom: 12px; }
.referral-link-row { display: flex; gap: 8px; }
.referral-input { flex: 1; padding: 10px 14px; border: none; border-radius: 6px; font-size: 0.9rem; background: rgba(255,255,255,0.15); color: #fff; }
.referral-card .btn-secondary { background: rgba(255,255,255,0.2); color: #fff; border-color: rgba(255,255,255,0.3); }
.referral-card .text-muted { color: rgba(255,255,255,0.8); }
.link-block { background: var(--bg); border-radius: 8px; padding: 20px; }
.link-block h4 { margin-bottom: 4px; }

/* Payout form */
.payout-form { margin-top: 16px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.data-table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.85rem; }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 0.78rem; font-weight: 600; }
.badge-approved, .badge-active, .badge-paid { background: #d4edda; color: #155724; }
.badge-pending, .badge-requested { background: #fff3cd; color: #856404; }
.badge-rejected, .badge-cancelled, .badge-inactive { background: #f8d7da; color: #721c24; }
.badge-suspended { background: #fde8d8; color: #7a3200; }
.badge-terminated { background: #e2e3e5; color: #383d41; }

/* Alerts */
.alert { padding: 12px 18px; border-radius: 6px; margin-bottom: 20px; font-size: 0.9rem; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-info { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

/* Text helpers */
.text-muted { color: var(--text-muted); }
.text-muted small { font-size: 0.8rem; }

/* Detail grid */
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.detail-grid > div { display: flex; flex-direction: column; }
.detail-grid label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); font-weight: 600; margin-bottom: 2px; }

/* Filter tabs */
.filter-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-tabs a { padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; text-decoration: none; color: var(--text-muted); background: var(--bg); border: 1px solid var(--border); }
.filter-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Tables — scrollable wrapper */
.card-table { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Admin layout */
.admin-layout { background: var(--bg-alt); }
.admin-wrapper { display: flex; min-height: 100vh; }
.admin-sidebar { width: 220px; background: var(--sidebar-bg); color: var(--sidebar-text); flex-shrink: 0; display: flex; flex-direction: column; }
.sidebar-brand { padding: 24px 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.08); text-align: center; display: flex; align-items: center; justify-content: center; }
.brand-text { font-size: 1.1rem; font-weight: 700; color: #fff; }
.sidebar-nav { flex: 1; padding: 16px 0; }
.sidebar-nav a { display: flex; align-items: center; gap: 10px; padding: 11px 20px; color: var(--sidebar-text); text-decoration: none; font-size: 0.92rem; transition: all 0.2s; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.05); color: #fff; }
.sidebar-nav a.active { background: var(--primary); color: #fff; }
.nav-icon { font-size: 1rem; width: 20px; text-align: center; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.08); }
.logout-link { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 0.85rem; }
.logout-link:hover { color: #fff; }
.admin-main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.admin-topbar { background: var(--topbar-bg); border-bottom: 1px solid var(--border); padding: 0 28px; height: 56px; display: flex; align-items: center; justify-content: space-between; }
.topbar-title { font-size: 1.1rem; font-weight: 600; }
.topbar-user { font-size: 0.88rem; color: var(--text-muted); }
.admin-content { padding: 28px; flex: 1; overflow-y: auto; }

/* Admin mobile hamburger (hidden on desktop) */
.admin-hamburger {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: none; border-radius: 6px;
  background: var(--bg); cursor: pointer; font-size: 1.3rem;
  color: var(--text); flex-shrink: 0;
}
/* Admin overlay (behind open sidebar drawer on mobile) */
.admin-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.45); z-index: 199;
}
.admin-overlay.open { display: block; }

/* Affiliate mobile hamburger (hidden on desktop) */
.nav-hamburger {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: none; border-radius: 6px;
  background: transparent; cursor: pointer; font-size: 1.4rem;
  color: var(--text); flex-shrink: 0;
}
/* Affiliate mobile nav panel (hidden on desktop) */
.nav-mobile-panel {
  display: none; flex-direction: column;
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-mobile-panel a {
  padding: 12px 24px; color: var(--text-muted); text-decoration: none;
  font-size: 0.95rem; font-weight: 500; border-bottom: 1px solid var(--border);
}
.nav-mobile-panel a:last-child { border-bottom: none; }
.nav-mobile-panel a.active, .nav-mobile-panel a:hover { color: var(--primary); background: var(--bg); }
.nav-mobile-panel .nav-logout { color: var(--danger); }

/* ── Analytics Dashboard ── */
.dash-page { background: var(--bg-alt); }
.admin-layout .admin-content { background: var(--bg-alt); }

.dash-stat-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.dash-stat-card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 18px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.dash-stat-icon {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.dash-stat-icon.purple  { background: #ede9fe; color: #6d28d9; }
.dash-stat-icon.teal    { background: #d1fae5; color: #047857; }
.dash-stat-icon.blue    { background: #dbeafe; color: #1d4ed8; }
.dash-stat-icon.orange  { background: #ffedd5; color: #c2410c; }
.dash-stat-icon.pink    { background: #fce7f3; color: #be185d; }
.dash-stat-icon.magenta { background: #fdf4ff; color: #86198f; }
.dash-stat-body { min-width: 0; }
.dash-stat-value { font-size: 1.45rem; font-weight: 700; color: var(--text); line-height: 1.1; }
.dash-stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 3px; white-space: nowrap; }

.dash-mid-row {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 20px;
  margin-bottom: 24px;
  align-items: start;
}
.dash-panel {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.dash-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}
.dash-panel-title { font-size: 0.95rem; font-weight: 700; color: var(--text); margin: 0; }
.dash-panel-controls { display: flex; gap: 8px; align-items: center; }
.dash-select {
  font-size: 0.78rem; padding: 4px 8px;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--text); cursor: pointer;
}

/* Network tree */
.tree-viewport {
  width: 100%; height: 300px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  position: relative;
}
.tree-viewport svg { display: block; width: 100%; height: 100%; }
.tree-controls {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.tree-btn {
  width: 28px; height: 28px; border: none; border-radius: 6px;
  font-size: 1rem; font-weight: 700; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  line-height: 1; transition: opacity .15s;
}
.tree-btn:hover { opacity: .8; }
.tree-btn-zoom-in  { background: #f59e0b; color: #fff; }
.tree-btn-zoom-out { background: #374151; color: #fff; }
.tree-btn-reset    { background: #1f2937; color: #fff; font-size: 0.85rem; }
.tree-drag-hint { font-size: 0.72rem; color: #9ca3af; white-space: nowrap; }
.tree-readout   { font-size: 0.7rem; color: #6b7280; margin-left: auto; white-space: nowrap; }

/* Bottom grid rows */
.dash-bottom-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.dash-panel canvas { width: 100% !important; }
.dash-mini-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.dash-mini-table th { color: var(--text-muted); font-weight: 600; text-transform: uppercase; font-size: 0.7rem; padding: 0 0 8px; border-bottom: 1px solid var(--border); text-align: left; }
.dash-mini-table td { padding: 9px 0; border-bottom: 1px solid var(--border); color: var(--text); }
.dash-mini-table tr:last-child td { border-bottom: none; }
.dash-empty { color: var(--text-muted); font-size: 0.83rem; padding: 20px 0; text-align: center; }
.dash-tag { display: inline-block; background: var(--bg); border-radius: 4px; padding: 2px 7px; font-size: 0.72rem; color: var(--text); font-family: monospace; }

/* Responsive — tablet & mobile */
@media (max-width: 768px) {
  /* Forms */
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  /* Auth */
  .auth-box { padding: 28px 20px; }

  /* Admin navigation — off-canvas drawer */
  .admin-hamburger { display: flex; }
  .admin-sidebar {
    position: fixed; left: -240px; top: 0; height: 100vh;
    z-index: 200; transition: left .25s ease; width: 220px;
  }
  .admin-sidebar.open { left: 0; box-shadow: 4px 0 24px rgba(0,0,0,.3); }
  .admin-topbar { padding: 0 16px; gap: 12px; }
  .admin-content { padding: 16px; }

  /* Affiliate navigation — hamburger */
  .main-nav { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile-panel.open { display: flex; }

  /* Dashboard grid collapse */
  .dash-stat-row { grid-template-columns: repeat(2, 1fr); }
  .dash-mid-row { grid-template-columns: 1fr; }
  .dash-bottom-row { grid-template-columns: 1fr; }

  /* Tier rows in program form */
  .tier-row { flex-wrap: wrap; }
  .tier-row select, .tier-row input[type=number] { width: 100% !important; max-width: 100% !important; }

  /* Card headers */
  .card-header { flex-wrap: wrap; gap: 10px; }
}

/* Small phones */
@media (max-width: 480px) {
  .dash-stat-row { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .btn { padding: 9px 14px; }
  .auth-box { padding: 24px 16px; }
  .card { padding: 16px; }
  .admin-content { padding: 12px; }
  .filter-tabs a { font-size: 0.8rem; padding: 5px 12px; }
  .data-table th, .data-table td { padding: 9px 8px; }
  .dash-stat-value { font-size: 1.2rem; }
}

/* ── Dark mode — card elevation ── */
[data-theme="dark"] .card,
[data-theme="dark"] .dash-stat-card,
[data-theme="dark"] .dash-panel,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .auth-box {
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
  border-color: #3a4a5c;
}

/* ── Dark mode overrides for hardcoded-colour elements ── */
[data-theme="dark"] .stat-card.highlight { background: #2d2a1a; border-color: #b8860b; }

[data-theme="dark"] .badge-approved,
[data-theme="dark"] .badge-active,
[data-theme="dark"] .badge-paid       { background: #0d2b1a; color: #4ade80; }
[data-theme="dark"] .badge-pending,
[data-theme="dark"] .badge-requested  { background: #2b2200; color: #fbbf24; }
[data-theme="dark"] .badge-rejected,
[data-theme="dark"] .badge-cancelled,
[data-theme="dark"] .badge-inactive   { background: #2b0d0d; color: #f87171; }
[data-theme="dark"] .badge-suspended  { background: #2b1800; color: #fb923c; }
[data-theme="dark"] .badge-terminated { background: #1e2330; color: #94a3b8; }

[data-theme="dark"] .alert-success { background: #0d2b1a; color: #4ade80; border-color: #166534; }
[data-theme="dark"] .alert-error   { background: #2b0d0d; color: #f87171; border-color: #991b1b; }
[data-theme="dark"] .alert-info    { background: #0d1f2b; color: #7dd3fc; border-color: #0c4a6e; }

[data-theme="dark"] .dash-stat-icon.purple  { background: #2e1d5e; color: #a78bfa; }
[data-theme="dark"] .dash-stat-icon.teal    { background: #052e16; color: #34d399; }
[data-theme="dark"] .dash-stat-icon.blue    { background: #0c1f4a; color: #60a5fa; }
[data-theme="dark"] .dash-stat-icon.orange  { background: #3b1f0a; color: #fb923c; }
[data-theme="dark"] .dash-stat-icon.pink    { background: #3b0d24; color: #f472b6; }
[data-theme="dark"] .dash-stat-icon.magenta { background: #2d0a3b; color: #c084fc; }

[data-theme="dark"] .tree-btn-zoom-in  { background: #b45309; }
[data-theme="dark"] .tree-btn-zoom-out { background: #374151; }
[data-theme="dark"] .tree-btn-reset    { background: #1f2937; }

[data-theme="dark"] .data-table code { background: #0d1117; color: #7dd3fc; }

/* ── Theme toggle — always fixed to far right corner ── */
.theme-toggle-fixed {
  position: fixed;
  top: 14px;
  right: 18px;
  z-index: 9999;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 5px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: all 0.2s;
  white-space: nowrap;
}
.theme-toggle-fixed:hover { border-color: var(--primary); color: var(--primary); }