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

:root {
    --primary-color: #2563eb;
    --secondary-color: #10b981;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --text-color: #334155;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
}

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

/* Header */
.header {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0;
}

.logo .tagline {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 320px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    color: var(--text-color) !important;
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: var(--light-color);
    color: var(--primary-color) !important;
}

.dropdown-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.dropdown-item strong {
    display: block;
    font-size: 0.95rem;
    color: var(--dark-color);
    margin-bottom: 0.15rem;
}

.dropdown-item small {
    display: block;
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.7;
    line-height: 1.3;
}

.dropdown-item:hover strong {
    color: var(--primary-color);
}

/* Language Switcher */
.language-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--light-color);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-color);
    transition: all 0.3s;
}

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

.lang-icon {
    font-size: 1.2rem;
}

#currentLang {
    font-size: 0.9rem;
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    min-width: 180px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 0.5rem;
}

.language-switcher:hover .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-color);
    transition: background 0.2s;
    text-align: left;
}

.lang-option:hover {
    background: var(--light-color);
}

.lang-option.active {
    background: var(--light-color);
    color: var(--primary-color);
    font-weight: 600;
}

.lang-option .flag {
    font-size: 1.5rem;
}

.btn-demo {
    background: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    transition: background 0.3s;
}

.btn-demo:hover {
    background: #1d4ed8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin: 3rem 0;
}

.stat-item h3 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Section Styles */
section {
    padding: 5rem 0;
}

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

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 3rem;
    opacity: 0.8;
}

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

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: justify;
}

/* Products Section */
.products {
    background: white;
}

.product-detail {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.product-detail:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-header {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.product-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.product-title {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.product-tagline {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 500;
}

.product-body {
    margin-top: 1.5rem;
}

.product-description {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: justify;
}

.product-features,
.product-benefits {
    margin-top: 2rem;
}

.product-features h4,
.product-benefits h4 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.product-features ul,
.product-benefits ul {
    list-style: none;
    padding-left: 0;
}

.product-features li,
.product-benefits li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    line-height: 1.6;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.product-benefits li:before {
    content: "★";
    position: absolute;
    left: 0;
    color: #f59e0b;
    font-weight: bold;
    font-size: 1.2rem;
}

.product-features li strong {
    color: var(--dark-color);
}

/* Why Us Section */
.why-us {
    background: var(--light-color);
}

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

.why-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.why-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.why-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.why-card h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.why-card p {
    line-height: 1.6;
}

/* Standards Section */
.standards {
    background: var(--dark-color);
    color: white;
}

.standards .section-title {
    color: white;
}

.standards .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

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

.standard-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all 0.3s;
}

.standard-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.standard-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.standard-item p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Contact Section */
.contact {
    background: white;
}

/* Demo Inquiry Form Section */
.demo-inquiry {
    background: var(--light-color);
    padding: 5rem 0;
}

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

.demo-inquiry-header {
    text-align: center;
    margin-bottom: 3rem;
}

.demo-form {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.required {
    color: #dc2626;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background 0.2s;
}

.checkbox-label:hover {
    background: var(--light-color);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.form-hint {
    display: block;
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 0.25rem;
}

.form-actions {
    text-align: center;
    margin-top: 2rem;
}

.form-note {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 1rem;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.form-message {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.form-message.success {
    border-top: 4px solid var(--secondary-color);
}

.form-message.error {
    border-top: 4px solid #dc2626;
}

.message-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.form-message.success .message-icon {
    color: var(--secondary-color);
}

.form-message.error .message-icon {
    color: #dc2626;
}

.form-message h3 {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.form-message p {
    font-size: 1.1rem;
    line-height: 1.6;
}

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

.form-message a:hover {
    text-decoration: underline;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.contact-item {
    text-align: center;
    padding: 2rem;
    background: var(--light-color);
    border-radius: 12px;
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-item h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

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

.contact-item a:hover {
    text-decoration: underline;
}

.cta-section {
    text-align: center;
    padding: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
}

.cta-section h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* Footer */
.footer {
    background: var(--dark-color);
    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;
}

.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: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

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

.footer-bottom p {
    margin: 0.5rem 0;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        flex-direction: column;
        gap: 1rem;
    }

    /* Mobile Dropdown */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--light-color);
        margin-top: 0.5rem;
        display: none;
    }

    .dropdown:hover .dropdown-menu,
    .dropdown.active .dropdown-menu {
        display: block;
    }

    .dropdown-item {
        padding: 0.75rem 1rem;
    }

    /* Mobile Language Switcher */
    .lang-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--light-color);
        margin-top: 0.5rem;
        display: none;
    }

    .language-switcher:hover .lang-menu,
    .language-switcher.active .lang-menu {
        display: block;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .product-header {
        flex-direction: column;
    }

    .product-title {
        font-size: 1.5rem;
    }

    .why-grid,
    .standards-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    /* Form Responsive */
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .demo-form {
        padding: 2rem 1.5rem;
    }

    .checkbox-group {
        gap: 0.5rem;
    }
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-detail,
.why-card,
.standard-item,
.contact-item {
    animation: fadeIn 0.6s ease-out;
}