/* Serene Pulse Design System */
:root {
  --primary: #005050;
  --primary-light: #00796B;
  --primary-container: #006A6A;
  --on-primary: #ffffff;
  --surface: #F8FAFB;
  --surface-container-low: #F2F4F5;
  --surface-container-lowest: #ffffff;
  --on-surface: #191C1D;
  --on-surface-variant: #3E4948;
  --secondary: #446180;
  --secondary-container: #BCDAFE;
  --outline-variant: rgba(190, 201, 200, 0.2);
  
  --font-headline: 'Manrope', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  
  --sidebar-width: 280px;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-headline);
  font-weight: 800;
  letter-spacing: -0.03em;
}

/* Glassmorphism Classes */
.glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-panel {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.04);
}

/* Tonal Layering */
.card-tier-1 {
  background-color: var(--surface-container-low);
  border-radius: var(--radius-lg);
  border: 1px solid var(--outline-variant);
}

.card-tier-2 {
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(25, 28, 27, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  color: #ffffff;
  padding: 16px 32px;
  border-radius: 50px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(0, 80, 80, 0.15);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 30px rgba(0, 80, 80, 0.25);
}

.btn-secondary {
  background-color: white;
  color: var(--primary);
  padding: 16px 32px;
  border-radius: 50px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--outline-variant);
  cursor: pointer;
}

.btn-secondary:hover {
  background-color: var(--surface-container-low);
  transform: translateY(-2px);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Animations */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(1deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 0 0 rgba(0, 121, 107, 0.3); }
  70% { box-shadow: 0 0 0 15px rgba(0, 121, 107, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 121, 107, 0); }
}

.animate-float { animation: float 8s ease-in-out infinite; }
.animate-fade { animation: fadeIn 1s cubic-bezier(0.16, 1, 0.3, 1) both; }
.pulse { animation: pulse-glow 2s infinite; }

/* Dashboard Specifics */
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 12px;
  color: var(--on-surface-variant);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.sidebar-link.active {
  background: var(--surface-container-lowest);
  color: var(--primary);
  border-color: var(--outline-variant);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.sidebar-link:hover:not(.active) {
  background: rgba(0, 80, 80, 0.05);
}

/* Chat Bubbles */
.ai-msg {
  align-self: flex-start;
  border-bottom-left-radius: 4px !important;
  background: rgba(255, 255, 255, 0.8) !important;
}

.user-msg {
  align-self: flex-end;
  border-bottom-right-radius: 4px !important;
  background: var(--primary) !important;
  color: white !important;
}

/* Analytics Cards */
.stat-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
}

/* Typography */
h1 { font-size: 4rem; line-height: 1; }
h2 { font-size: 2.5rem; }
.text-overline { text-transform: uppercase; letter-spacing: 0.15em; font-weight: 800; color: var(--primary); font-size: 0.8rem; margin-bottom: 12px; display: block; }

/* Pricing */
.pricing-card.featured {
  border: 2px solid var(--primary);
  transform: scale(1.05);
  box-shadow: 0 30px 70px rgba(0, 80, 80, 0.15);
  z-index: 2;
}

/* Inputs */
input[type="text"], textarea, select {
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(0, 80, 80, 0.1);
}