/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4ff;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand a {
    text-decoration: none;
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.8) 0%, rgba(0, 212, 255, 0.8) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
    line-height: 1.2;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1.2s ease;
}

/* Buttons */
.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Products Section */
.products {
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.product-card {
    background: var(--bg-white);
    padding: 0;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

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

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

.product-icon {
    font-size: 3rem;
    margin: 1rem 0;
    position: relative;
    z-index: 1;
}

.product-card h3,
.product-card p,
.product-card .product-features {
    padding: 0 2rem;
}

.product-card .product-features {
    padding-bottom: 2rem;
}

.product-card h3 {
    font-size: 1.5rem;
    margin: 0.5rem 0 1rem 0;
    color: var(--text-dark);
}

.product-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.product-features span {
    background: var(--bg-light);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* Applications Section */
.applications {
    background: var(--bg-white);
}

.applications-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.application-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.application-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.application-card:nth-child(even) {
    direction: rtl;
}

.application-card:nth-child(even) > * {
    direction: ltr;
}

.application-image {
    width: 100%;
    height: 100%;
    min-height: 300px;
    overflow: hidden;
}

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

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

.application-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.application-content h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.application-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.application-benefits {
    list-style: none;
    padding: 0;
}

.application-benefits li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 1.5rem;
}

.application-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Manufacturing Section */
.manufacturing {
    background: var(--bg-white);
}

.manufacturing-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    margin-top: 3rem;
    align-items: center;
}

.manufacturing-image {
    width: 100%;
    height: 500px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

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

.manufacturing-text h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.manufacturing-text > p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.manufacturing-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.manufacturing-feature {
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
}

.manufacturing-feature:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.manufacturing-feature h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.manufacturing-feature:hover h4 {
    color: white;
}

.manufacturing-feature p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

.manufacturing-feature:hover p {
    color: rgba(255, 255, 255, 0.95);
}

.manufacturing-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.manufacturing-stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 12px;
    border: 2px solid var(--primary-color);
}

.manufacturing-stat h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.manufacturing-stat p {
    color: var(--text-dark);
    font-weight: 500;
    margin: 0;
}

/* Solutions Section */
.solutions {
    background: var(--bg-light);
}

.solutions-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.solution-item {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    transition: var(--transition);
}

.solution-item:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    transform: translateY(-5px);
}

.solution-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.solution-item:hover h3 {
    color: white;
}

.solution-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.solution-item:hover p {
    color: rgba(255, 255, 255, 0.95);
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    width: 100%;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

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

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: left;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat h3 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-light);
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.contact-form {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
        padding: 0 1rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .section-title {
        font-size: 2rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }

    .about-text h2 {
        text-align: center;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .application-card {
        grid-template-columns: 1fr;
    }

    .application-card:nth-child(even) {
        direction: ltr;
    }

    .application-image {
        min-height: 250px;
    }

    .application-content {
        padding: 2rem;
    }

    .manufacturing-content {
        grid-template-columns: 1fr;
    }

    .manufacturing-image {
        height: 400px;
    }

    .manufacturing-features {
        grid-template-columns: 1fr;
    }

    .manufacturing-stats {
        grid-template-columns: 1fr;
    }

    .learning-grid {
        grid-template-columns: 1fr;
    }

    .minerals-list,
    .ree-list {
        grid-template-columns: 1fr;
    }

    .selection-factors {
        grid-template-columns: 1fr;
    }

    .article-header h1 {
        font-size: 2rem;
    }

    .article-body h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0;
    }

    .hero-title {
        font-size: 1.5rem;
        padding: 0 1rem;
    }

    section {
        padding: 60px 0;
    }

    .product-card,
    .contact-form {
        padding: 1.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--bg-light);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumbs ol {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    align-items: center;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumbs li:not(:last-child)::after {
    content: '/';
    color: var(--text-light);
    margin-left: 0.5rem;
}

.breadcrumbs a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs span {
    color: var(--text-dark);
}

/* Quick Links Section */
.quick-links {
    background: var(--bg-white);
    padding: 60px 0;
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.quick-link-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    text-align: center;
    box-shadow: var(--shadow);
}

.quick-link-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.quick-link-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.quick-link-card:hover h3 {
    color: white;
}

.quick-link-card p {
    color: var(--text-light);
    margin: 0;
}

.quick-link-card:hover p {
    color: rgba(255, 255, 255, 0.95);
}

/* Learning Center Section */
.learning-center {
    background: var(--bg-white);
    padding: 80px 0;
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.learning-card {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.learning-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.learning-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

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

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

.learning-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.learning-content h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.learning-content > p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.learning-topics {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.learning-topics li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-dark);
}

.learning-topics li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Article Content */
.article-content {
    background: var(--bg-white);
    padding: 60px 0;
}

.article-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.article-header h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.article-meta {
    color: var(--text-light);
    font-size: 0.95rem;
}

.article-body {
    max-width: 900px;
    margin: 0 auto;
}

.article-body section {
    margin-bottom: 3rem;
}

.article-body h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-top: 1rem;
}

.article-body h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin: 2rem 0 1rem 0;
}

.article-body p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.article-body ul,
.article-body ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.article-body li {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.article-body strong {
    color: var(--text-dark);
    font-weight: 600;
}

.minerals-list,
.ree-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.mineral-category,
.ree-group {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.mineral-category h3,
.ree-group h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.mineral-category ul,
.ree-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mineral-category li,
.ree-group li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.mineral-category li::before,
.ree-group li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.selection-factors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.factor {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.factor h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.factor p {
    margin: 0;
    font-size: 0.95rem;
}

.references {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-top: 3rem;
}

.references h2 {
    margin-top: 0;
}

.references ul {
    list-style: none;
    padding: 0;
}

.references li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.references li::before {
    content: '📚';
    position: absolute;
    left: 0;
}

.references a {
    color: var(--primary-color);
    text-decoration: none;
}

.references a:hover {
    text-decoration: underline;
}

/* Accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}