:root {
    --primary: #1B3A57;
    --secondary: #2C5282;
    --accent: #3182CE;
    --brand-accent: #E53E3E;
    --light-bg: #FFFFFF;
    --text: #1A202C;
    --light-text: #4A5568;
    --max-width: 1200px;
    --bright-blue: #4299E1;
    --bright-orange: #FF6B35;
    --success-green: #38A169;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Montserrat", sans-serif;
    color: var(--text);
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6)),
        url("../images/interior-view-steel-factory2.jpg");
    background-size: cover;
    background-position: center;
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(3px);
    z-index: -1;
}



.hero-section {
    padding: 8rem 2rem 3rem;
    max-width: var(--max-width);
    margin: auto;
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: #fff;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    font-weight: 400;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.content-section {
    padding: 5rem 2rem;
    max-width: var(--max-width);
    margin: auto;
}

.approach-section {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
    animation: fadeInUp 1s ease-out;
}

.approach-content h3 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.approach-content p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cta-button {
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.approach-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.gear-system {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 300px;
    height: 180px;
}

.gear-3d {
    position: absolute;
    transform-style: preserve-3d;
}

.gear-main {
    animation: rotate 8s linear infinite;
    z-index: 2;
    left: 0;
    top: 0;
}

.gear-secondary {
    animation: rotate 8s linear infinite reverse;
    z-index: 1;
    right: 0;
    top: 0;
    transform: translateX(-30px);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 6rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.4s ease;
    animation: slideInUp 1s ease-out;
    cursor: pointer;
    height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card:hover {
    transform: translateY(-15px) scale(1.05);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    height: 320px;
}

.feature-card:hover .feature-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.feature-card:hover h4,
.feature-card:hover p {
    color: white;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    transition: all 0.4s ease;
}

.feature-card h4 {
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0;
    transition: all 0.4s ease;
}

.feature-card:hover h4 {
    margin-bottom: 1.5rem;
}

.feature-card p {
    color: var(--light-text);
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.feature-card:hover p {
    opacity: 1;
    max-height: 200px;
}

.process-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: flex-start;
}

.process-intro {
    position: sticky;
    top: 120px;
}

.process-intro h3 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.process-intro p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    line-height: 1.7;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step-item {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    opacity: 0;
    transform: translateX(100px) translateY(30px) scale(0.8);
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.step-item.visible {
    opacity: 1;
    transform: translateX(0) translateY(0) scale(1);
}

.step-item:nth-child(even) {
    transform: translateX(-100px) translateY(30px) scale(0.8);
}

.step-item:nth-child(even).visible {
    transform: translateX(0) translateY(0) scale(1);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 2rem;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.step-item h4 {
    color: var(--primary);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-top: 0.5rem;
}

.step-item p {
    color: var(--light-text);
    font-size: 1rem;
    line-height: 1.6;
}



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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-section {
        padding: 2rem 1rem;
        background: #1B3A57;
    }
    
    .hero-title {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .content-section {
        padding: 1.5rem 1rem;
    }
    
    .approach-section {
        display: block;
        background: #f8f9fa;
        padding: 1rem;
        border-radius: 8px;
        margin-bottom: 1.5rem;
        backdrop-filter: none;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .approach-content h3 {
        color: #1B3A57;
        font-size: 1.5rem;
        margin-bottom: 1rem;
        text-shadow: none;
    }
    
    .approach-content p {
        color: #666;
        font-size: 0.9rem;
        line-height: 1.4;
        margin-bottom: 1rem;
    }
    
    .approach-visual {
        display: none;
    }
    
    .features-grid {
        display: block;
        margin-bottom: 2rem;
    }
    
    .feature-card {
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 8px;
        padding: 1rem;
        margin-bottom: 1rem;
        height: auto;
        backdrop-filter: none;
        box-shadow: none;
        animation: none;
    }
    
    .feature-icon {
        width: 40px;
        height: 40px;
        margin-bottom: 1rem;
        background: #C1440E;
        font-size: 1rem;
    }
    
    .feature-card h4 {
        font-size: 1rem;
        color: #1B3A57;
        margin-bottom: 0.5rem;
    }
    
    .feature-card p {
        opacity: 1;
        max-height: none;
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    .process-section {
        display: block;
        gap: 0;
    }
    
    .process-intro {
        position: static;
        background: #f8f9fa;
        padding: 1.5rem;
        border-radius: 8px;
        margin-bottom: 1rem;
    }
    
    .process-intro h3 {
        color: #1B3A57;
        font-size: 1.5rem;
        margin-bottom: 1rem;
        text-shadow: none;
    }
    
    .process-intro p {
        color: #666;
        font-size: 0.9rem;
        line-height: 1.4;
    }
    
    .process-steps {
        gap: 1rem;
    }
    
    .step-item {
        background: #fff;
        border: 1px solid #ddd;
        border-radius: 8px;
        padding: 1rem;
        margin-bottom: 1rem;
        backdrop-filter: none;
        box-shadow: none;
        opacity: 1;
        transform: none;
        animation: none;
    }
    
    .step-number {
        position: static;
        display: inline-block;
        width: auto;
        height: auto;
        background: #C1440E;
        border-radius: 8px;
        padding: 0.25rem 0.5rem;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
        box-shadow: none;
    }
    
    .step-item h4 {
        font-size: 1rem;
        color: #1B3A57;
        margin-bottom: 0.5rem;
        padding-top: 0;
    }
    
    .step-item p {
        font-size: 0.9rem;
        line-height: 1.4;
    }
}