/* ============================================
   LEKYN - PREMIUM DARK DESIGN SYSTEM
   Creative Design & Web Engineering Platform
   Target: International Recruiters
   ============================================ */

:root {
    /* === Core Brand Colors === */
    --lekyn-anthracite: #1D1D1B;        /* Main background - NOT pure black */
    --lekyn-anthracite-light: #2A2A27;  /* Lighter variant for cards */
    --lekyn-anthracite-dark: #141412;   /* Darker variant for depth */
    
    --lekyn-gold: #FABF03;              /* Accent color - USE SPARINGLY */
    --lekyn-gold-muted: #D19E02;        /* Muted gold for subtle accents */
    --lekyn-gold-glow: rgba(250, 191, 3, 0.15); /* Glow effect */
    
    /* === Text Colors === */
    --lekyn-text-primary: #F5F5F3;      /* Off-white for main text */
    --lekyn-text-secondary: #B8B8B5;    /* Light gray for secondary text */
    --lekyn-text-muted: #8A8A87;        /* Muted gray for less important text */
    
    /* === Semantic Colors === */
    --lekyn-success: #10B981;
    --lekyn-warning: #F59E0B;
    --lekyn-error: #EF4444;
    --lekyn-info: #3B82F6;
    
    /* === Borders & Dividers === */
    --lekyn-border: rgba(255, 255, 255, 0.08);
    --lekyn-border-hover: rgba(250, 191, 3, 0.2);
    
    /* === Shadows === */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-gold: 0 0 20px rgba(250, 191, 3, 0.3);
    
    /* === Typography === */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-display: 'Inter', var(--font-sans);
    
    /* === Spacing === */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* === Border Radius === */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* === Standard Border Radius for Cards === */
    --card-radius: 1rem;  /* 16px - Uniformisé pour toutes les cartes */
    
    /* === Transitions === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   BASE STYLES
   ============================================ */

body {
    background-color: var(--lekyn-anthracite);
    color: var(--lekyn-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   HEADER - PREMIUM DARK
   ============================================ */

.header-dark {
    background: rgba(29, 29, 27, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--lekyn-border);
}

.nav-link-dark {
    color: var(--lekyn-text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link-dark:hover {
    color: var(--lekyn-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link-dark.active {
    color: var(--lekyn-gold);
    background: var(--lekyn-gold-glow);
}

.nav-link-dark.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
    height: 2px;
    background: var(--lekyn-gold);
}

/* ============================================
   BUTTONS - PREMIUM STYLE
   ============================================ */

.btn-primary-dark {
    background: var(--lekyn-gold);
    color: var(--lekyn-anthracite);
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary-dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-primary-dark:hover::before {
    left: 100%;
}

.btn-primary-dark:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
    background: #FFC933;
}

.btn-secondary-dark {
    background: transparent;
    color: var(--lekyn-text-primary);
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--lekyn-border);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary-dark:hover {
    border-color: var(--lekyn-gold);
    color: var(--lekyn-gold);
    background: var(--lekyn-gold-glow);
}

/* ============================================
   HERO SECTION - PREMIUM DARK
   ============================================ */

.hero-dark {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: center;
    background: var(--lekyn-anthracite);
    overflow: hidden;
    padding-top: 6rem;
    padding-bottom: 3rem;
}

.hero-dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--lekyn-gold), transparent);
    opacity: 0.3;
}

.hero-dark::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -10%;
    width: 40rem;
    height: 40rem;
    background: radial-gradient(circle, var(--lekyn-gold-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-title-dark {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--lekyn-text-primary);
    letter-spacing: -0.02em;
}

.hero-title-accent {
    color: var(--lekyn-gold);
    position: relative;
    display: inline-block;
}

.hero-subtitle-dark {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--lekyn-text-secondary);
    font-weight: 400;
    line-height: 1.6;
}

/* ============================================
   CARDS - PREMIUM DARK
   ============================================ */

.card-dark {
    background: var(--lekyn-anthracite-light);
    border: 1px solid var(--lekyn-border);
    border-radius: var(--card-radius);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.card-dark:hover {
    border-color: var(--lekyn-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-dark-featured {
    background: var(--lekyn-anthracite-light);
    border: 1px solid var(--lekyn-gold);
    border-radius: var(--card-radius);
    padding: var(--spacing-xl);
}

/* ============================================
   SECTION DIVIDERS
   ============================================ */

.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--lekyn-border), transparent);
    margin: var(--spacing-3xl) 0;
}

.section-divider-gold {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--lekyn-gold), transparent);
    opacity: 0.3;
    margin: var(--spacing-3xl) 0;
}

/* ============================================
   TEXT UTILITIES
   ============================================ */

.text-primary-dark {
    color: var(--lekyn-text-primary);
}

.text-secondary-dark {
    color: var(--lekyn-text-secondary);
}

.text-muted-dark {
    color: var(--lekyn-text-muted);
}

.text-gold {
    color: var(--lekyn-gold);
}

/* ============================================
   ACCENT ELEMENTS
   ============================================ */

.accent-line {
    width: 4rem;
    height: 2px;
    background: var(--lekyn-gold);
    margin: var(--spacing-md) 0;
}

.accent-dot {
    width: 0.5rem;
    height: 0.5rem;
    background: var(--lekyn-gold);
    border-radius: 50%;
    display: inline-block;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--lekyn-gold-glow);
    }
    50% {
        box-shadow: 0 0 20px var(--lekyn-gold-glow), 0 0 30px var(--lekyn-gold-glow);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .hero-dark {
        min-height: 70vh;
    }
    
    .hero-title-dark {
        font-size: 2rem;
    }
    
    .hero-subtitle-dark {
        font-size: 1rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.bg-anthracite {
    background-color: var(--lekyn-anthracite);
}

.bg-anthracite-light {
    background-color: var(--lekyn-anthracite-light);
}

.border-dark {
    border-color: var(--lekyn-border);
}

.border-gold {
    border-color: var(--lekyn-gold);
}