/* 
 * Lion Chalk Works - Main Stylesheet
 * Premium Industrial Design System
 */

/* =========================================
   1. VARIABLES & TOKENS
   ========================================= */
:root {
    /* Colors */
    --color-primary: #1a1a1a;       /* Deep Charcoal */
    --color-secondary: #ffffff;     /* Pure White */
    --color-accent: #d4a574;        /* Industrial Gold */
    --color-accent-hover: #b88b5c;
    --color-safety: #ff6b35;        /* Safety Orange */
    --color-tech: #2d5f8d;          /* Technical Blue */
    --color-gray-100: #f9f9f9;
    --color-gray-200: #e5e5e5;
    --color-gray-800: #333333;
    
    /* Typography */
    --font-display: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-tech: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 32px;
    --space-xl: 64px;
    --space-xxl: 128px;
    
    /* Layout */
    --container-width: 1280px;
    --grid-gap: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
   2. RESET & BASE
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-primary);
    background-color: var(--color-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* =========================================
   3. TYPOGRAPHY
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--color-gray-800);
}

.text-tech {
    font-family: var(--font-tech);
    font-size: 0.9rem;
    color: var(--color-tech);
}

.text-gold { color: var(--color-accent); }
.text-white { color: var(--color-secondary); }

/* =========================================
   4. LAYOUT UTILITIES
   ========================================= */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.grid {
    display: grid;
    gap: var(--grid-gap);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.section {
    padding: var(--space-xl) 0;
}

.section-dark {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

.section-dark h1, .section-dark h2, .section-dark p {
    color: var(--color-secondary);
}

/* =========================================
   5. COMPONENTS
   ========================================= */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-family: var(--font-display);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn-outline {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--color-secondary);
    color: var(--color-primary);
}

.btn-outline-dark {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline-dark:hover {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-secondary);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: var(--space-md) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Mobile Menu */
.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

#mobile-menu-check {
    display: none;
}

/* Cards */
.card {
    background-color: var(--color-secondary);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: var(--color-gray-100);
    object-fit: cover;
    position: relative;
    overflow: hidden;
}

.card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    opacity: 0;
    transition: var(--transition-fast);
}

.card:hover .card-image::after {
    opacity: 1;
}

.card-content {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.card-sku {
    font-family: var(--font-tech);
    font-size: 0.8rem;
    color: var(--color-gray-800);
    margin-bottom: var(--space-sm);
    opacity: 0.7;
}

.card-footer {
    margin-top: auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--space-xl) 0 var(--space-md);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-col h4 {
    color: var(--color-accent);
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-md);
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

/* =========================================
   6. RESPONSIVE
   ========================================= */
@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-secondary);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-gray-200);
        transform: translateY(-150%);
        transition: var(--transition-smooth);
        z-index: 999;
    }

    #mobile-menu-check:checked ~ .nav-links {
        transform: translateY(0);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    h1 { font-size: 2.5rem; }
}