/* ==========================================================
   Xilo Design Language — Colors & Design Tokens
   Philosophy: Clarity over Complexity, Insight over Activity
   ========================================================== */

:root {
  /* Primary Palette */
  --xilo-primary: #1BB0A5;
  --xilo-primary-dark: #0F4F4C;
  --xilo-accent: #FF8C42;
  --xilo-mist: #F7F8F8;
  --xilo-graphite: #2E2F33;
  
  /* Secondary Palette */
  --xilo-card-bg: #FFFFFF;
  --xilo-border: #E4E7E7;
  --xilo-hover-bg: #D7F1EE;
  --xilo-error: #E74C3C;
  --xilo-success: #27AE60;
  --xilo-warning: #F39C12;
  
  /* Typography */
  --xilo-font-family: -apple-system, BlinkMacSystemFont, 'Satoshi', 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --xilo-font-weight-normal: 400;
  --xilo-font-weight-medium: 500;
  --xilo-font-weight-semibold: 600;
  --xilo-font-weight-bold: 700;
  
  /* Spacing (base unit: 1rem = 16px) */
  --xilo-spacing-xs: 0.5rem;
  --xilo-spacing-sm: 0.875rem;
  --xilo-spacing-md: 1.5rem;
  --xilo-spacing-lg: 2rem;
  --xilo-spacing-xl: 4rem;
  
  /* Border Radius */
  --xilo-radius-sm: 0.75rem;
  --xilo-radius-md: 1rem;
  --xilo-radius-lg: 1.25rem;
  
  /* Shadows */
  --xilo-shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --xilo-shadow-md: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
  --xilo-shadow-primary: 0 4px 12px rgba(27, 176, 165, 0.3);
  
  /* Transitions */
  --xilo-transition-fast: 0.15s ease-out;
  --xilo-transition-standard: 0.25s ease-in-out;
  --xilo-transition-slow: 0.4s ease;
}

/* =====================
   Dark Mode Palette
   ===================== */
[data-bs-theme="dark"] {
  --xilo-mist: #121617;
  --xilo-card-bg: #1E2324;
  --xilo-graphite: #E4E7E7;
  --xilo-border: #2C3435;
}

/* =====================
   Base Theme Application
   ===================== */
html, body {
  font-family: var(--xilo-font-family);
  background-color: var(--xilo-mist);
  color: var(--xilo-graphite);
  font-weight: var(--xilo-font-weight-normal);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--xilo-primary);
  transition: color var(--xilo-transition-standard);
}

a:hover {
  color: var(--xilo-primary-dark);
}

/* =====================
   Navbar Theme Variants
   Usage: Add .navbar-light-theme OR .navbar-gradient-theme to navbar
   ===================== */

/* Base navbar styles */
.xilo-navbar {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Light Theme Navbar (Default) */
.xilo-navbar.navbar-light-theme {
  background: var(--xilo-card-bg) !important;
  border-bottom: 1px solid var(--xilo-border);
}

.xilo-navbar.navbar-light-theme .navbar-brand {
  font-weight: var(--xilo-font-weight-bold);
  color: var(--xilo-primary) !important;
  letter-spacing: -0.01em;
}

.xilo-navbar.navbar-light-theme .navbar-brand:hover {
  color: var(--xilo-primary-dark) !important;
}

.xilo-navbar.navbar-light-theme .navbar-toggler {
  border-radius: var(--xilo-radius-sm);
  transition: background-color var(--xilo-transition-standard);
  border-color: var(--xilo-border);
}

.xilo-navbar.navbar-light-theme .navbar-toggler:hover {
  background-color: var(--xilo-hover-bg);
}

.xilo-navbar.navbar-light-theme .navbar-toggler:focus {
  background-color: var(--xilo-hover-bg);
  box-shadow: none;
}

.xilo-navbar.navbar-light-theme .xilo-nav-link {
  color: var(--xilo-graphite) !important;
  border-radius: var(--xilo-radius-sm) !important;
  transition: all var(--xilo-transition-standard);
  font-weight: var(--xilo-font-weight-medium);
}

.xilo-navbar.navbar-light-theme .xilo-nav-link:hover {
  background-color: var(--xilo-hover-bg) !important;
  color: var(--xilo-primary) !important;
}

.xilo-navbar.navbar-light-theme .xilo-nav-link.active {
  background-color: var(--xilo-hover-bg) !important;
  color: var(--xilo-primary) !important;
  font-weight: var(--xilo-font-weight-semibold);
}

/* Gradient Theme Navbar */
.xilo-navbar.navbar-gradient-theme {
  background: linear-gradient(135deg, var(--xilo-primary) 0%, var(--xilo-primary-dark) 100%) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.xilo-navbar.navbar-gradient-theme .navbar-brand {
  font-weight: var(--xilo-font-weight-bold);
  color: white !important;
  letter-spacing: -0.01em;
}

.xilo-navbar.navbar-gradient-theme .navbar-brand:hover {
  opacity: 0.9;
}

.xilo-navbar.navbar-gradient-theme .navbar-toggler {
  border-radius: var(--xilo-radius-sm);
  transition: background-color var(--xilo-transition-standard);
  border: none;
}

.xilo-navbar.navbar-gradient-theme .navbar-toggler:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.xilo-navbar.navbar-gradient-theme .navbar-toggler:focus {
  background-color: rgba(255, 255, 255, 0.15);
  box-shadow: none;
}

.xilo-navbar.navbar-gradient-theme .xilo-nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  border-radius: var(--xilo-radius-sm) !important;
  transition: all var(--xilo-transition-standard);
  font-weight: var(--xilo-font-weight-medium);
}

.xilo-navbar.navbar-gradient-theme .xilo-nav-link:hover {
  background-color: rgba(255, 255, 255, 0.15) !important;
  color: white !important;
}

.xilo-navbar.navbar-gradient-theme .xilo-nav-link.active {
  background-color: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
  font-weight: var(--xilo-font-weight-semibold);
}

/* Mobile navbar theme - Light */
@media (max-width: 768px) {
  .xilo-navbar.navbar-light-theme .navbar-collapse {
    background: transparent;
    border-top: none;
    box-shadow: none;
    padding-top: 0.5rem;
  }
  
  .xilo-navbar.navbar-light-theme .xilo-nav-link {
    border-radius: var(--xilo-radius-sm) !important;
  }
}

/* Mobile navbar theme - Gradient */
@media (max-width: 768px) {
  .xilo-navbar.navbar-gradient-theme .navbar-collapse {
    background: transparent;
    border-top: none;
    box-shadow: none;
    padding-top: 0.5rem;
  }
  
  .xilo-navbar.navbar-gradient-theme .xilo-nav-link {
    border-radius: var(--xilo-radius-sm) !important;
  }
}

/* =====================
   Utility Classes
   ===================== */
.lift {
  transition: all var(--xilo-transition-standard);
}

.lift:hover {
  box-shadow: var(--xilo-shadow-md);
}

/* =====================
   Accessibility
   ===================== */
*:focus-visible {
  outline: 2px solid var(--xilo-primary);
  outline-offset: 2px;
  border-radius: var(--xilo-radius-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}