/* ========================================
   IRONTECH - Industrial Machinery B2B Website
   CSS Styles
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #1a1a1a;
    --color-primary-light: #2d2d2d;
    --color-secondary: #e85d04;
    --color-accent: #f48c06;
    --color-background: #ffffff;
    --color-background-alt: #f5f5f5;
    --color-background-dark: #1a1a1a;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-text-inverse: #ffffff;
    --color-border: #e0e0e0;
    --color-border-dark: #333333;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* 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;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --container-max: 1280px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border-color: var(--color-secondary);
}

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

.btn-dark {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.btn-dark:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--color-text-inverse);
    border-color: var(--color-text-inverse);
}

.btn-outline-light:hover {
    background-color: var(--color-text-inverse);
    color: var(--color-primary);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-base);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: transparent;
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    background-color: var(--color-background);
    box-shadow: var(--shadow-md);
}

.header.scrolled .nav-links a,
.header.scrolled .logo {
    color: var(--color-text);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-inverse);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.nav-links a {
    color: var(--color-text-inverse);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-secondary);
    transition: width var(--transition-base);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-inverse);
    transition: all var(--transition-base);
}

.header.scrolled .menu-toggle span {
    background-color: var(--color-text);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.85) 0%, rgba(26, 26, 26, 0.7) 50%, rgba(26, 26, 26, 0.85) 100%);
}

.hero .container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.hero-content {
    max-width: 800px;
}

.hero-subtitle {
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    color: var(--color-text-inverse);
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
}

.hero-title span {
    color: var(--color-secondary);
}

.hero-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin-bottom: var(--spacing-2xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-number {
    color: var(--color-text-inverse);
    font-size: var(--font-size-4xl);
    font-weight: 700;
}

.stat-label {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-secondary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Section Styles */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-subtitle {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    line-height: 1.2;
}

/* Key Points Section */
.key-points {
    background-color: var(--color-background);
}

.points-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.point-card {
    padding: var(--spacing-2xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.point-card:hover {
    border-color: var(--color-secondary);
    transform: translateY(-4px);
}

.point-number {
    display: block;
    color: var(--color-secondary);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.point-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.point-desc {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* Featured Products */
.featured-products {
    background-color: var(--color-background-alt);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.product-card {
    background-color: var(--color-background);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    aspect-ratio: 4/3;
    background-color: var(--color-background-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-placeholder {
    width: 60%;
    height: 60%;
    color: var(--color-text-light);
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.product-link {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-radius: 50%;
    font-size: var(--font-size-xl);
    transition: all var(--transition-base);
}

.product-link:hover {
    background-color: var(--color-secondary);
    transform: rotate(90deg);
}

.product-info {
    padding: var(--spacing-xl);
}

.product-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.product-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.product-datasheet {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-base);
}

.product-datasheet:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.product-desc {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.products-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

/* Innovation Section */
.innovation {
    background-color: var(--color-background);
    text-align: center;
}

.innovation-content {
    max-width: 800px;
    margin: 0 auto;
}

.innovation-title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
}

.innovation-image {
    margin: var(--spacing-3xl) 0;
}

.innovation-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.innovation-placeholder {
    position: relative;
    height: 400px;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.innovation-visual {
    position: relative;
    width: 200px;
    height: 200px;
}

.gear {
    position: absolute;
    border: 4px solid var(--color-secondary);
    border-radius: 50%;
    animation: rotate 10s linear infinite;
}

.gear::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30%;
    height: 30%;
    background-color: var(--color-secondary);
    border-radius: 50%;
}

.gear-1 {
    width: 120px;
    height: 120px;
    top: 0;
    left: 0;
}

.gear-2 {
    width: 80px;
    height: 80px;
    top: 60px;
    right: 0;
    animation-direction: reverse;
    animation-duration: 7s;
}

.gear-3 {
    width: 60px;
    height: 60px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-duration: 5s;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.innovation-desc {
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
}

/* Categories Section */
.categories {
    background-color: var(--color-background-alt);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.category-card {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.category-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-primary);
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.category-card:hover .category-image img {
    transform: scale(1.1);
}

.category-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.2);
    font-size: var(--font-size-5xl);
    font-weight: 800;
}

.category-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-xl);
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--color-text-inverse);
    transform: translateY(20px);
    opacity: 0;
    transition: all var(--transition-base);
}

.category-card:hover .category-overlay {
    transform: translateY(0);
    opacity: 1;
}

.category-overlay h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.category-count {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

/* CTA Section */
.cta-section {
    background-color: var(--color-primary);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    color: var(--color-text-inverse);
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Footer */
.footer {
    background-color: var(--color-background-dark);
    color: var(--color-text-inverse);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-main {
    display: flex;
    gap: var(--spacing-4xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    flex: 1;
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-desc {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.footer-links {
    flex: 2;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-col h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-secondary);
}

.footer-col li:not(:has(a)) {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

.footer-lang {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.footer-lang a {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-sm);
}

.footer-lang a.active {
    color: var(--color-text-inverse);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-sm);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-sm);
}

.footer-legal a:hover {
    color: var(--color-text-inverse);
}

/* ========================================
   Page Specific Styles
   ======================================== */

/* Page Header (for inner pages) */
.page-header {
    padding: calc(var(--header-height) + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.page-header .section-subtitle {
    color: var(--color-secondary);
}

.page-header .section-title {
    color: var(--color-text-inverse);
}

.page-header .nav-links a,
.page-header .logo {
    color: var(--color-text-inverse);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

.breadcrumb a:hover {
    color: var(--color-text-inverse);
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-sm);
}

.breadcrumb-separator {
    color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   Responsive Styles
   ======================================== */

@media (max-width: 1024px) {
    .points-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        gap: var(--spacing-2xl);
        background-color: var(--color-primary);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links a {
        color: var(--color-text-inverse);
        font-size: var(--font-size-2xl);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .nav-actions .btn {
        display: none;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }
    
    .stat-item {
        flex: 1 1 calc(50% - var(--spacing-xl));
    }
    
    .points-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        flex-direction: column;
        gap: var(--spacing-2xl);
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}