/* ==========================================================================
   Visionary Health Tracker - Global Design System & CSS Variables
   Palette: Deep Midnight Purple (#0f0a21), Violet (#8b5cf6), Lavender (#f3e8ff)
   ========================================================================== */

:root {
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', 'Plus Jakarta Sans', sans-serif;

  /* Color System */
  --bg-dark: #0b0718;
  --bg-gradient: radial-gradient(circle at 50% 0%, #1e1147 0%, #0f0a21 60%, #070412 100%);
  --bg-card: rgba(26, 16, 63, 0.55);
  --bg-card-hover: rgba(40, 24, 96, 0.7);
  --bg-glass: rgba(15, 10, 33, 0.75);

  --accent-purple: #8b5cf6;
  --accent-purple-dark: #6d28d9;
  --accent-deep: #4c1d95;
  --accent-light: #a78bfa;
  --accent-glow: rgba(139, 92, 246, 0.35);
  --accent-glow-strong: rgba(139, 92, 246, 0.6);
  --accent-cyan: #38bdf8;

  --text-primary: #f3e8ff;
  --text-secondary: #c4b5fd;
  --text-muted: #94a3b8;

  --border-glass: rgba(139, 92, 246, 0.22);
  --border-glass-hover: rgba(167, 139, 250, 0.5);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.3);

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

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: #ffffff;
}

/* Glassmorphism Utilities */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-glow);
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #c4b5fd 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Layout Containers */
.main-content {
  flex: 1;
  padding-top: 90px;
  padding-bottom: 50px;
}

.app-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 7, 24, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.15);
}

.container-nav {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 2px solid var(--accent-purple);
  box-shadow: 0 0 12px var(--accent-glow);
  transition: var(--transition-normal);
}

.brand-logo:hover .logo-img {
  transform: scale(1.08) rotate(5deg);
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
}

.brand-highlight {
  color: var(--accent-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(139, 92, 246, 0.15);
}

.nav-link.active {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-deep), var(--accent-purple));
  box-shadow: 0 0 15px var(--accent-glow);
}

/* Status Badge */
.status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-light);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  background: linear-gradient(135deg, #7c3aed 0%, #4c1d95 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow-strong);
  background: linear-gradient(135deg, #8b5cf6 0%, #5b21b6 100%);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass);
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-secondary:hover {
  background: rgba(139, 92, 246, 0.25);
  border-color: var(--accent-light);
  color: #ffffff;
}

/* Footer */
.app-footer {
  background: rgba(7, 4, 18, 0.85);
  border-top: 1px solid rgba(139, 92, 246, 0.15);
  padding: 40px 0 25px 0;
  margin-top: auto;
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-light);
}

.footer-copy {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 18px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive Media Queries */
@media (max-width: 868px) {
  .status-badge {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(11, 7, 24, 0.96);
    backdrop-filter: blur(25px);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-glass);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
}