/**
 * Bistro Aura - Core UI Design Engine
 * Custom Editorial Luxury System built atop Bootstrap 5 Utility Baselines
 */

/* ==========================================================================
   1. DESIGN TOKENS & SYSTEM VARIABLES
   ========================================================================== */
:root {
    /* Color Spectrum */
    --color-cream: #FDFBF7;
    --color-beige: #F5EFEB;
    --color-charcoal: #1A1A1A;
    --color-forest: #2C3E2B;
    --color-gold: #C5A059;
    --color-copper: #A85E32;
    --color-white: #FFFFFF;
    
    /* Typography Rules */
    --font-serif: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', 'Jost', system-ui, -apple-system, sans-serif;
    
    /* Animation Timing */
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-snappy: all 0.25s ease-out;
}

/* ==========================================================================
   2. GLOBAL ELEMENT RESETS & BASELINE
   ========================================================================== */
body {
    background-color: var(--color-cream);
    color: var(--color-charcoal);
    font-family: var(--font-sans);
    font-size: 1.05rem;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Luxury Typography Scale */
h1, h2, h3, h4, h5, h6, .display-luxury {
    font-family: var(--font-serif);
    color: var(--color-charcoal);
    font-weight: 500;
    letter-spacing: -0.02em;
}

p {
    color: rgba(26, 26, 26, 0.85); /* Optimized WCAG Contrast ratio */
}

/* Smooth Focus Rings for Premium Accessibility */
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 4px;
}

/* ==========================================================================
   3. STRUCTURAL COMPONENTS & INTERACTION UTILITIES
   ========================================================================== */

/* Editorial Typography Modifiers */
.text-serif { font-family: var(--font-serif); }
.text-gold { color: var(--color-gold); }
.text-forest { color: var(--color-forest); }

/* Custom Luxury Buttons */
.btn-aura-primary {
    background-color: var(--color-forest);
    color: var(--color-cream);
    font-family: var(--font-sans);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    padding: 1rem 2.25rem;
    border: 1px solid var(--color-forest);
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.btn-aura-primary:hover {
    background-color: transparent;
    color: var(--color-forest);
    border-color: var(--color-forest);
}

.btn-aura-secondary {
    background-color: transparent;
    color: var(--color-charcoal);
    font-family: var(--font-sans);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    padding: 1rem 2.25rem;
    border: 1px solid var(--color-gold);
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.btn-aura-secondary:hover {
    background-color: var(--color-gold);
    color: var(--color-white);
}

/* Custom Sticky Header Rules */
.header-navigation {
    background-color: rgba(253, 251, 247, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(197, 160, 89, 0.15);
    transition: var(--transition-snappy);
    z-index: 1050;
}

.header-navigation.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
}

.nav-link-aura {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-charcoal) !important;
    position: relative;
    padding: 0.5rem 1rem;
    transition: var(--transition-snappy);
}

.nav-link-aura::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 1px;
    background-color: var(--color-gold);
    transform: scaleX(0);
    transition: var(--transition-snappy);
}

.nav-link-aura:hover::after,
.nav-link-aura.active::after {
    transform: scaleX(1);
}

/* Language Alternator Control */
.lang-switch {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-decoration: none;
    color: var(--color-charcoal);
    padding: 2px 6px;
    border-radius: 3px;
}
.lang-switch.active {
    background-color: var(--color-gold);
    color: var(--color-white) !important;
}

/* Preloader & Lazy Elements */
.lazy-loaded-img {
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}
.lazy-loaded-img.loaded {
    opacity: 1;
}