/* CSS Variables for theming */
:root {
    /* Colors */
    --primary-color: #FFA500;
    --primary-dark: #e69500;
    --secondary-color: #3b82f6;
    --accent-color: #10b981;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --light-bg: #f9fafb;
    --dark-bg: #111827;
    --white: #ffffff;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-700: #374151;
    --gray-900: #1f2937;
    /* Typography */
    --font-sans: 'Noto Sans', 'Noto Sans SC', 'Noto Sans TC', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Mono', monospace;
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
}

/* Dark theme variables */
[data-theme="dark"] {
    --primary-color: #FFA500;
    --primary-dark: #cc8400;
    --text-color: #f9fafb;
    --text-light: #d1d5db;
    --light-bg: #1f2937;
    --dark-bg: #111827;
    --white: #1f2937;
    --gray-100: #374151;
    --gray-200: #4b5563;
    --gray-300: #6b7280;
    --gray-700: #d1d5db;
    --gray-900: #f9fafb;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: var(--font-sans);
    color: var(--text-color);
    background-color: var(--light-bg);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 1000;
    transition: top 0.3s;
}

    .skip-link:focus {
        top: 0;
    }

/* Language Switcher */
.language-switcher {
    background: var(--white);
    border-radius: var(--radius-full);
    padding: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    display: flex;
    gap: var(--spacing-xs);
}

.lang-btn {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
}

    .lang-btn:hover {
        background-color: var(--gray-100);
        color: var(--text-color);
    }

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

    .lang-btn i {
        font-size: 0.75rem;
    }

/* Theme Switcher */
.theme-switcher {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

    .theme-switcher:hover {
        background-color: var(--gray-100);
        transform: rotate(15deg);
    }

    .theme-switcher i {
        font-size: 1rem;
        color: var(--text-color);
    }

[data-theme="dark"] .theme-switcher i {
    color: var(--accent-color);
}

/* Main Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
}

/* Navigation */
.main-nav {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 900;
    transition: all var(--transition-normal);
}

/* Updated Navigation Styles */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 50px; /* 50px gap between logo and nav-menu */
}

.logo {
    flex-shrink: 0;
    margin-right: var(--spacing-xl);
}

    .logo img {
        height: 80px;
        width: auto;
        transition: transform var(--transition-fast);
    }

        .logo img:hover {
            transform: scale(1.05);
        }

/* Keep existing nav-menu styles but adjust for new layout */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xl);
    flex-grow: 1;
    justify-content: center;
}


    .nav-menu a {
        text-decoration: none;
        color: var(--text-color);
        font-weight: 500;
        font-size: 0.95rem;
        transition: color var(--transition-fast);
        position: relative;
        padding: var(--spacing-xs) 0;
        white-space: nowrap;
    }

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

        .nav-menu a:hover {
            color: var(--primary-color);
        }

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

/* Right side controls */
.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-left: auto;
    flex-shrink: 0;
}

.mobile-menu-btn:hover {
    background-color: var(--gray-100);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('/images/View2.jpg') center;
        background-repeat: no-repeat;
        background-size: cover;
        opacity: 0.3;
    }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    animation: fadeInUp 1s ease-out;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

    .cta-button.primary {
        background-color: var(--primary-color);
    }

        .cta-button.primary:hover {
            background-color: var(--primary-dark);
        }

    .cta-button.secondary {
        background-color: transparent;
        border-color: var(--text-color);
        color: var(--text-color);
    }

        .cta-button.secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-down {
    color: white;
    font-size: 1.5rem;
    text-decoration: none;
    display: block;
    transition: transform var(--transition-fast);
}

    .scroll-down:hover {
        transform: translateY(5px);
    }

/* About Section */
.about {
    background-color: var(--white);
    padding: var(--spacing-2xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.about-images {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.about-image-wrapper {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

    .about-image-wrapper:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-xl);
    }

    .about-image-wrapper img {
        width: 100%;
        height: 250px;
        object-fit: cover;
        display: block;
        transition: transform var(--transition-normal);
    }

    .about-image-wrapper:hover img {
        transform: scale(1.03);
    }

.image-caption {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
    font-style: italic;
    border-top: 1px solid var(--gray-200);
    background: var(--light-bg);
}

.about-text h3 {
    font-size: 1.5rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    color: var(--primary-color);
}

    .about-text h3:first-child {
        margin-top: 0;
    }

.expertise-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

    .expertise-list li {
        padding: var(--spacing-sm) 0;
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        color: var(--text-light);
    }

        .expertise-list li i {
            color: var(--primary-color);
            width: 20px;
        }

.about-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Projects Section */
.projects {
    background-color: var(--light-bg);
}

.project-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--white);
    color: var(--text-color);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

    .filter-btn:hover,
    .filter-btn.active {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
    border-left: 4px solid var(--primary-color);
}

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

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

    .project-header h3 {
        font-size: 1.25rem;
        margin: 0;
        color: var(--text-color);
    }

.project-year {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.project-content p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    line-height: 1.6;
}

.project-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

    .project-stats span {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        font-size: 0.875rem;
        color: var(--text-light);
    }

    .project-stats i {
        color: var(--primary-color);
    }

.project-more {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* Expertise Section */
.expertise {
    background-color: var(--white);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.expertise-category {
    background: var(--light-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

    .expertise-category h3 {
        font-size: 1.25rem;
        margin-bottom: var(--spacing-md);
        color: var(--primary-color);
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .expertise-category ul {
        list-style: none;
    }

    .expertise-category li {
        padding: var(--spacing-xs) 0;
        color: var(--text-light);
        position: relative;
        padding-left: var(--spacing-lg);
    }

        .expertise-category li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-weight: bold;
        }

/* Contact Section Updates */
.contact-info-list {
    list-style: none;
}

    .contact-info-list li {
        margin-bottom: var(--spacing-sm);
        display: flex;
        align-items: flex-start;
        gap: var(--spacing-sm);
        color: var(--text-light);
    }

    .contact-info-list i {
        color: var(--primary-color);
        margin-top: var(--spacing-xs);
        width: 16px;
    }

/* Responsive Design */
@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 480px) {
    .project-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .project-year {
        align-self: flex-start;
    }
}

/* Section Styles */
section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

    .section-header h2 {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: var(--spacing-sm);
        color: var(--text-color);
    }

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services {
    background-color: var(--white);
}

.services-intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    color: var(--text-light);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

    .service-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-xl);
        border-color: var(--primary-color);
    }

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.service-details {
    list-style: none;
    text-align: left;
    width: 100%;
    margin-top: var(--spacing-md);
}

    .service-details li {
        padding: var(--spacing-xs) 0;
        color: var(--text-light);
        position: relative;
        padding-left: var(--spacing-lg);
    }

        .service-details li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-weight: bold;
        }
/* Solutions Section */
.solutions {
    background-color: var(--light-bg);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.solution-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

    .solution-card:hover {
        transform: translateY(-5px);
    }

.solution-icon {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

    .solution-icon img {
        max-width: 120px;
        height: auto;
        filter: grayscale(100%);
        transition: filter var(--transition-normal);
    }

.solution-card:hover .solution-icon img {
    filter: grayscale(0%);
}

.solution-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
    text-align: center;
}

.solution-card ul {
    list-style: none;
}

.solution-card li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-200);
    color: var(--text-light);
    position: relative;
    padding-left: var(--spacing-lg);
}

    .solution-card li::before {
        content: '→';
        position: absolute;
        left: 0;
        color: var(--primary-color);
    }

    .solution-card li:last-child {
        border-bottom: none;
    }

/* Training Section */
.training {
    background-color: var(--white);
}

.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.training-card {
    background-color: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

    .training-card:hover {
        border-color: var(--primary-color);
        transform: translateY(-5px);
    }

.training-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.training-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.training-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.training-card ul {
    list-style: none;
    text-align: left;
}

.training-card li {
    padding: var(--spacing-xs) 0;
    color: var(--text-light);
    position: relative;
    padding-left: var(--spacing-lg);
}

    .training-card li::before {
        content: '•';
        position: absolute;
        left: 0;
        color: var(--secondary-color);
        font-weight: bold;
    }

/* Newsletter Section */
.newsletter {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.newsletter p {
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    background-color: rgba(255, 255, 255, 0.9);
}

.newsletter-form button {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
}

    .newsletter-form button:hover {
        background-color: #e69500;
    }

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: none;
}

    .form-message.success {
        background-color: rgba(16, 185, 129, 0.1);
        color: var(--secondary-color);
        border: 1px solid var(--secondary-color);
        display: block;
    }

    .form-message.error {
        background-color: rgba(239, 68, 68, 0.1);
        color: #ef4444;
        border: 1px solid #ef4444;
        display: block;
    }

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.contact-info {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

    .contact-info h3 {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-xl);
        color: var(--text-color);
    }

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}

    .contact-item i {
        font-size: 1.25rem;
        color: var(--primary-color);
        margin-top: var(--spacing-xs);
    }

    .contact-item h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-xs);
        color: var(--text-light);
    }

    .contact-item p,
    .contact-item a {
        color: var(--text-color);
        text-decoration: none;
        transition: color var(--transition-fast);
    }

        .contact-item a:hover {
            color: var(--primary-color);
        }

.contact-form {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

    .contact-form .form-group {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-xs);
        margin-bottom: var(--spacing-lg);
    }

    .contact-form input,
    .contact-form select,
    .contact-form textarea {
        padding: var(--spacing-md);
        border: 1px solid var(--gray-300);
        border-radius: var(--radius-md);
        font-size: 1rem;
        font-family: var(--font-sans);
        background-color: var(--light-bg);
        color: var(--text-light);
        transition: border-color var(--transition-fast);
    }

        .contact-form input:focus,
        .contact-form select:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

    .contact-form textarea {
        resize: vertical;
        min-height: 120px;
    }

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.submit-btn {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
}

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

    .submit-btn:disabled {
        background-color: var(--gray-300);
        cursor: not-allowed;
    }

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section img {
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

    .social-links a {
        color: var(--gray-300);
        font-size: 1.25rem;
        transition: color var(--transition-fast);
    }

        .social-links a:hover {
            color: var(--primary-color);
        }

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
}

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

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

    .footer-bottom p {
        color: var(--gray-300);
        font-size: 0.875rem;
    }

.powered-by {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    justify-content: center;
    color: var(--primary-color) !important;
}

    .powered-by i {
        font-size: 0.75rem;
    }

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

    .loading-spinner.active {
        opacity: 1;
        visibility: visible;
    }

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }

    40% {
        transform: translateY(-10px) translateX(-50%);
    }

    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--gray-200);
    }

        .nav-menu.active {
            display: flex;
        }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .form-group {
        flex-direction: column;
    }

    .language-switcher {
        top: auto;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }

    .theme-switcher {
        top: auto;
        bottom: var(--spacing-md);
        right: 80px;
    }
}


/* Print Styles */
@media print {
    .language-switcher,
    .theme-switcher,
    .mobile-menu-btn,
    .hero-scroll,
    .newsletter,
    .social-links,
    .cta-button {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    a {
        color: black !important;
        text-decoration: underline;
    }
}

/* Debug: Highlight elements with translation keys */
[data-key] {
    /* border: 1px solid rgba(255, 0, 0, 0.2) !important; */
}

.lang-btn.active {
    background-color: #007bff;
    color: white;
}

/* 3D Model Viewer Styles */
.model-viewer {
    background: linear-gradient(135deg, var(--light-bg) 0%, rgba(37, 99, 235, 0.05) 100%);
    padding: var(--spacing-2xl) 0;
}

.model-container {
    width: 100%;
    height: 500px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.model-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.model-control-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

    .model-control-btn:hover {
        background: var(--primary-color);
        color: white;
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .model-control-btn.active {
        background: var(--primary-color);
        color: white;
    }

    .model-control-btn i {
        font-size: 1rem;
    }

.model-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.info-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

    .info-card i {
        font-size: 2rem;
        color: var(--primary-color);
        margin-bottom: var(--spacing-md);
    }

    .info-card h4 {
        margin-bottom: var(--spacing-md);
        color: var(--text-color);
    }

    .info-card p, .info-card li {
        color: var(--text-light);
        line-height: 1.6;
    }

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

    .info-card li {
        padding: var(--spacing-xs) 0;
        position: relative;
        padding-left: var(--spacing-lg);
    }

        .info-card li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }

/* Progress Bar */
.progress-container {
    width: 200px;
    height: 4px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    height: 100%;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #ef4444;
}

/* Fullscreen styles */
.model-container:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

.model-container:-moz-full-screen {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

.model-container:-ms-fullscreen {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

.model-container:fullscreen {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .model-container {
        height: 400px;
    }

    .model-controls {
        gap: var(--spacing-xs);
    }

    .model-control-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

        .model-control-btn span {
            display: none;
        }

        .model-control-btn i {
            font-size: 1.25rem;
        }

    .model-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .model-container {
        height: 300px;
    }
}