:root {
  --brand-primary: #F4413D;
  --brand-primary-hover: #D7302C;
  --brand-primary-light: #FEE2E2;
  --brand-primary-subtle: #FFF5F5;
  --brand-navy: #0F172A;
  --brand-slate: #1E293B;
  --brand-border: #E2E8F0;
  --brand-bg: #F8FAFC;
}

/* Custom Base & Smooth Fonts */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--brand-bg);
  color: #1E293B;
  overflow-x: hidden;
}

/* Gmail Style Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(244, 65, 61, 0.3); }
  50% { box-shadow: 0 0 0 10px rgba(244, 65, 61, 0); }
}

.pulse-glow {
  animation: pulseGlow 2.5s infinite;
}

/* Gmail-like Inbox Rows */
.gmail-row {
  transition: all 0.15s ease;
  position: relative;
}

.gmail-row:hover {
  background-color: #F8FAFC;
  box-shadow: inset 1px 0 0 #DADCE0, inset -1px 0 0 #DADCE0, 0 1px 2px 0 rgba(60,64,67,0.15);
  z-index: 2;
}

.gmail-row.unread {
  background-color: #FFFFFF;
  font-weight: 600;
}

.gmail-row.unread::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--brand-primary);
  border-top-left-radius: 4px;
  border-bottom-left-radius: 4px;
}

.gmail-row.read {
  background-color: #F8FAFC;
  color: #475569;
}

.gmail-row .hover-actions {
  display: none;
}

.gmail-row:hover .hover-actions {
  display: flex;
}

.gmail-row:hover .row-date {
  display: none;
}

/* Ad Placement Placeholders (Google AdSense Ready) */
.ad-slot-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px dashed #CBD5E1;
  background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  text-align: center;
  transition: all 0.2s ease;
}

.ad-slot-container:hover {
  border-color: #94A3B8;
}

.ad-badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: #94A3B8;
  padding: 2px 8px;
  background: #FFFFFF;
  border-radius: 4px;
  border: 1px solid #E2E8F0;
  margin-bottom: 4px;
}

/* Skyscraper Ads on Desktop */
.ad-skyscraper {
  min-width: 160px;
  max-width: 160px;
  min-height: 600px;
  position: sticky;
  top: 90px;
}

@media (min-width: 1400px) {
  .ad-skyscraper {
    min-width: 300px;
    max-width: 300px;
    min-height: 600px;
  }
}

/* Leaderboard Banner Ads */
.ad-leaderboard {
  width: 100%;
  max-width: 970px;
  min-height: 90px;
  margin: 0 auto;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: #F1F5F9;
}
::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* Toast Notification */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: #0F172A;
  color: #FFFFFF;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25);
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.toast.success {
  border-left: 4px solid #10B981;
}

.toast.info {
  border-left: 4px solid var(--brand-primary);
}

.toast.warning {
  border-left: 4px solid #F59E0B;
}