/* ================================
   NEXUS SENTINEL AI — APP LAYOUT STYLES
   Dark theme, Electric Blue + Neon Cyan
   ================================ */

/* === GLOBAL VARS (extend landing vars) === */
:root {
  --sidebar-w: 240px;
  --sidebar-collapsed-w: 60px;
  --topbar-h: 64px;
}

/* === BODY + SCROLLBAR === */
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--text-3); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-2); }

/* === LAYOUT === */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 32px 40px;
  max-width: 100%;
  transition: margin-left 0.3s;
}

.app-main.sidebar-collapsed {
  margin-left: var(--sidebar-collapsed-w);
}

/* === SIDEBAR === */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width 0.3s;
  overflow: hidden;
}

.sidebar.collapsed { width: var(--sidebar-collapsed-w); }

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 20px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 8px;
  flex-shrink: 0;
  position: relative;
}
.sidebar-logo-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: var(--bg);
  border-radius: 3px;
}

.sidebar-logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  transition: all 0.2s;
  white-space: nowrap;
}

.nav-item:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.nav-item svg { flex-shrink: 0; }

.nav-item-label { overflow: hidden; }

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border);
}

.user-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: 8px;
  background: var(--surface-2);
  cursor: pointer;
  text-decoration: none;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}

.user-info { overflow: hidden; }

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-plan {
  font-size: 10px;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* === MOBILE LOGO SIZING (iOS/Android fix) === */
@media (max-width: 768px) {
  .sidebar-logo-icon {
    width: 26px;
    height: 26px;
    min-width: 26px;
  }
  .sidebar-logo-icon::after {
    width: 11px;
    height: 11px;
  }
  .sidebar-logo-text {
    font-size: 13px;
  }
  .nav-logo {
    font-size: 15px;
  }
  .logo-mark {
    width: 24px;
    height: 24px;
    min-width: 24px;
  }
  .logo-mark::after {
    width: 10px;
    height: 10px;
  }
}

/* === MOBILE === */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 300;
  width: 40px;
  height: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 199;
}

@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .mobile-overlay.active { display: block; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  .sidebar.mobile-open { transform: translateX(0); }
  .sidebar.collapsed { width: var(--sidebar-w); }

  .app-main {
    margin-left: 0 !important;
    padding: 80px 20px 32px;
  }
}

/* === PAGE HEADER === */
.page-header {
  margin-bottom: 32px;
}

.page-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-2);
}

/* ================================
   DASHBOARD PAGE
   ================================ */

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.kpi-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.1);
}

.kpi-icon {
  width: 36px;
  height: 36px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  color: var(--accent);
}

.kpi-label {
  font-size: 11px;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.kpi-trend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
}

.kpi-trend.up { color: var(--green); }
.kpi-trend.down { color: var(--red); }
.kpi-trend.neutral { color: var(--text-3); }

.kpi-card.health .kpi-icon { color: var(--green); background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.2); }
.kpi-card.health .kpi-value { color: var(--green); }
.kpi-card.anomaly .kpi-icon { color: var(--amber); background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.2); }
.kpi-card.anomaly .kpi-value { color: var(--amber); }

/* === MAIN GRID === */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 24px;
  margin-bottom: 24px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.panel-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Event Timeline */
.event-timeline {
  height: 460px;
  overflow-y: auto;
  padding: 12px;
}

.event-item {
  display: flex;
  gap: 14px;
  padding: 12px;
  border-radius: 8px;
  transition: background 0.15s;
  cursor: pointer;
  border: 1px solid transparent;
}

.event-item:hover {
  background: var(--surface-2);
  border-color: var(--border);
}

.event-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.event-icon.user { background: rgba(59,130,246,0.12); color: var(--accent); }
.event-icon.payment { background: rgba(16,185,129,0.12); color: var(--green); }
.event-icon.system { background: rgba(245,158,11,0.12); color: var(--amber); }
.event-icon.security { background: rgba(239,68,68,0.12); color: var(--red); }
.event-icon.activity { background: rgba(34,211,238,0.12); color: var(--accent-2); }
.event-icon.api { background: rgba(139,92,246,0.12); color: #8B5CF6; }
.event-icon.db { background: rgba(236,72,153,0.12); color: #EC4899; }
.event-icon.webhook { background: rgba(249,115,22,0.12); color: #F97316; }

.event-body { flex: 1; min-width: 0; }

.event-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.event-time {
  font-size: 11px;
  color: var(--text-3);
}

.event-type-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.event-type-badge.user { background: rgba(59,130,246,0.15); color: var(--accent); }
.event-type-badge.payment { background: rgba(16,185,129,0.15); color: var(--green); }
.event-type-badge.system { background: rgba(245,158,11,0.15); color: var(--amber); }
.event-type-badge.security { background: rgba(239,68,68,0.15); color: var(--red); }
.event-type-badge.activity { background: rgba(34,211,238,0.15); color: var(--accent-2); }
.event-type-badge.api { background: rgba(139,92,246,0.15); color: #8B5CF6; }
.event-type-badge.db { background: rgba(236,72,153,0.15); color: #EC4899; }
.event-type-badge.webhook { background: rgba(249,115,22,0.15); color: #F97316; }

.event-flag {
  font-size: 9px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
}

.event-flag.high { background: var(--red); }
.event-flag.medium { background: var(--amber); }
.event-flag.low { background: var(--green); }

.event-description {
  font-size: 13px;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.5;
}

.event-detail {
  font-size: 11px;
  color: var(--text-3);
}

/* AI Insight Panel */
.insight-panel { padding: 20px; }

.risk-card {
  background: rgba(239,68,68,0.06);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}

.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--red);
  margin-bottom: 10px;
}

.risk-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  animation: pulse 1.5s ease-in-out infinite;
}

.risk-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.risk-explanation {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 12px;
}

.risk-action {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* Trend Chart */
.trend-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-top: 24px;
}

.trend-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.trend-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.trend-controls {
  display: flex;
  gap: 8px;
}

.trend-btn {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s;
}

.trend-btn.active, .trend-btn:hover {
  background: rgba(59,130,246,0.12);
  border-color: rgba(59,130,246,0.3);
  color: var(--accent);
}

.chart-placeholder {
  height: 160px;
  background: linear-gradient(180deg, transparent 0%, rgba(59,130,246,0.06) 100%);
  border-radius: 8px;
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: 16px 24px;
  gap: 8px;
}

.chart-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--accent) 0%, rgba(59,130,246,0.3) 100%);
  border-radius: 3px 3px 0 0;
  min-height: 4px;
  transition: height 0.3s;
}

/* ================================
   EVENTS PAGE
   ================================ */

.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-label {
  font-size: 12px;
  color: var(--text-2);
}

.filter-select, .filter-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  padding: 7px 12px;
  outline: none;
  transition: border-color 0.2s;
}

.filter-select:focus, .filter-input:focus {
  border-color: var(--accent);
}

.events-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.event-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.event-card:hover { border-color: rgba(59,130,246,0.3); }
.event-card.flagged { border-left: 3px solid var(--red); }
.event-card.expanded { background: var(--surface-2); }

.event-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.event-card-body { flex: 1; }

.event-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.event-card-description {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 4px;
}

.event-card-detail {
  font-size: 12px;
  color: var(--text-2);
}

.event-expand {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: none;
}

.event-expand.visible { display: block; }

.expand-ai-explanation {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 10px;
  line-height: 1.6;
}

.expand-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.expand-tag {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
}

/* ================================
   ALERTS PAGE
   ================================ */

.alert-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.alert-tab {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  color: var(--text-2);
  background: transparent;
  border: none;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.alert-tab:hover { color: var(--text); }
.alert-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.alert-tab.critical .tab-dot { background: var(--red); }
.alert-tab.warning .tab-dot { background: var(--amber); }
.alert-tab.normal .tab-dot { background: var(--green); }
.alert-tab.all .tab-dot { background: var(--accent); }

.tab-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  margin-right: 4px;
}

.alert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  overflow: hidden;
  border-left: 4px solid transparent;
}

.alert-card.critical { border-left-color: var(--red); }
.alert-card.warning { border-left-color: var(--amber); }
.alert-card.normal { border-left-color: var(--green); }

.alert-card-header {
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.alert-card-body { flex: 1; }

.alert-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.alert-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.alert-card-description {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

.alert-actions {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  background: var(--surface-2);
  border-top: 1px solid var(--border);
}

.alert-actions .btn {
  padding: 6px 14px;
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  border: none;
}

.btn-view {
  background: transparent;
  border: 1px solid var(--border) !important;
  color: var(--text-2);
}
.btn-view:hover { border-color: var(--accent) !important; color: var(--accent); }

.btn-resolve {
  background: var(--green);
  color: #fff;
}
.btn-resolve:hover { filter: brightness(1.1); }
.btn-resolve:disabled { opacity: 0.5; cursor: not-allowed; }

.alert-expand {
  padding: 0 20px 16px;
  display: none;
}

.alert-expand.visible { display: block; }

.ai-section {
  background: var(--surface);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 10px;
}

.ai-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 6px;
}

.ai-section-text {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

/* Severity Badge */
.severity-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.severity-badge.critical { background: rgba(239,68,68,0.15); color: var(--red); }
.severity-badge.warning { background: rgba(245,158,11,0.15); color: var(--amber); }
.severity-badge.normal { background: rgba(16,185,129,0.15); color: var(--green); }

/* ================================
   INSIGHTS PAGE
   ================================ */

.insights-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.insights-count {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.insights-count-label {
  font-size: 14px;
  color: var(--text-2);
  margin-top: 4px;
}

.insights-summary-text {
  font-size: 15px;
  color: var(--text);
  flex: 1;
}

.risk-chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.risk-chart-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.risk-chart-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.risk-bar-chart {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.risk-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.risk-bar-label {
  font-size: 12px;
  color: var(--text-2);
  width: 60px;
  text-align: right;
}

.risk-bar-track {
  flex: 1;
  height: 8px;
  background: var(--surface-2);
  border-radius: 4px;
  overflow: hidden;
}

.risk-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s;
}

.risk-bar-fill.low { background: var(--green); }
.risk-bar-fill.medium { background: var(--amber); }
.risk-bar-fill.high { background: var(--red); }
.risk-bar-fill.critical { background: var(--red); box-shadow: 0 0 8px rgba(239,68,68,0.4); }

.risk-bar-count {
  font-size: 12px;
  color: var(--text);
  width: 30px;
}

.donut-chart {
  width: 160px;
  height: 160px;
  margin: 0 auto 16px;
  position: relative;
}

.insight-cards { display: flex; flex-direction: column; gap: 8px; }

.insight-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.insight-card.critical { border-left: 3px solid var(--red); }
.insight-card.high { border-left: 3px solid var(--amber); }
.insight-card.medium { border-left: 3px solid var(--accent); }
.insight-card.low { border-left: 3px solid var(--green); }

.insight-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.insight-time {
  font-size: 11px;
  color: var(--text-3);
}

.insight-risk {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.insight-risk.critical { background: rgba(239,68,68,0.15); color: var(--red); }
.insight-risk.high { background: rgba(245,158,11,0.15); color: var(--amber); }
.insight-risk.medium { background: rgba(59,130,246,0.15); color: var(--accent); }
.insight-risk.low { background: rgba(16,185,129,0.15); color: var(--green); }

.insight-explanation {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 8px;
}

.insight-action {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* ================================
   SETTINGS PAGE
   ================================ */

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.settings-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.settings-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  font-size: 12px;
  color: var(--text-2);
  margin-bottom: 6px;
  display: block;
}

.form-input, .form-select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s;
  font-family: var(--font-body);
}

.form-input:focus, .form-select:focus { border-color: var(--accent); }
.form-input::placeholder { color: var(--text-3); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.btn-primary:hover { filter: brightness(1.1); }

.btn-danger {
  background: rgba(239,68,68,0.1);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.btn-danger:hover { background: rgba(239,68,68,0.2); }

.subscription-banner {
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(34,211,238,0.1));
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.sub-icon {
  width: 40px;
  height: 40px;
  background: rgba(59,130,246,0.15);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.sub-info { flex: 1; }

.sub-plan {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.sub-detail {
  font-size: 12px;
  color: var(--text-2);
}

.sub-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sub-badge.pro { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.sub-badge.free { background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }
.sub-badge.demo { background: rgba(245,158,11,0.15); color: var(--amber); border: 1px solid rgba(245,158,11,0.2); }

.upgrade-cta {
  text-align: center;
  padding: 32px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 12px;
  margin-bottom: 24px;
}

.upgrade-cta h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text);
  margin-bottom: 8px;
}

.upgrade-cta p {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 16px;
}

/* ================================
   UTILITY
   ================================ */
.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}

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

.fade-in { animation: fadeIn 0.3s ease-out; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================================
   RESPONSIVE
   ================================ */
@media (max-width: 1100px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .risk-chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .settings-grid { grid-template-columns: 1fr; }
  .insights-summary { flex-direction: column; align-items: flex-start; gap: 12px; }
  .filter-bar { flex-direction: column; }
  .event-meta { flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .app-main { padding: 72px 16px 32px; }
}