:root {
    --primary-color: #0066cc;
    --secondary-color: #001a33;
    --background-color: #ffffff;
    --text-color: #333333;
    --accent-color: #00aaff;
}

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

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

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

/* Header styles */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

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

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a:not(.lang-switch) {
    position: relative;
    padding: 0.5rem 1rem;
}

.nav-links a:not(.lang-switch)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links a:not(.lang-switch):hover::after,
.nav-links a:not(.lang-switch).active::after {
    width: 100%;
}

.lang-switch {
    padding: 0.5rem 1.5rem;
    background-color: var(--background-color);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.lang-switch::before {
    content: '🌐';
    font-size: 1.1em;
}

.lang-switch:hover {
    background-color: var(--background-colorr);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s ease;
}

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

/* Main content styles */
main {
    margin-top: 70px;
}

section {
    padding: 4rem 0;
    min-height: calc(100vh - 70px);
    display: none;
}

section.active {
    display: block;
}

/* Hide about section */
#about {
    display: none !important;
}

/* Hero section */
.hero {
    text-align: center;
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

/* Why Kuma AI section */
.why-kuma {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.why-kuma h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
    font-size: 2rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 1rem;
}

.service-item {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-item {
    position: relative;
    padding-top: 3rem;
}

.service-item .icon {
    position: absolute;
    top: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.service-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    text-align: center;
}

.service-item p {
    color: var(--text-color);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .why-kuma {
        padding: 2rem 0;
    }
    
    .service-item {
        padding: 1.5rem;
    }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.5rem;
    opacity: 0.9;
}

/* Company info styles */
.company-info {
    max-width: 800px;
    margin: 2rem auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    width: 30%;
    color: var(--secondary-color);
    background-color: #f8f9fa;
}

/* News styles */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.news-item {
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
}

.news-date {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.news-title {
    font-size: 1.1rem;
    color: var(--secondary-color);
}

/* Contact form and message styles */
.form-message {
    display: none;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    text-align: center;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.submit-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Footer styles */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive design */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        margin-top: 1rem;
    }

    .nav-links a {
        margin: 0 1rem;
        font-size: 0.9rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    th {
        width: 40%;
    }
}