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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-link {
    text-decoration: none;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
}

.nav-logo .logo-link:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 140px;
    width: auto;
    object-fit: contain;
    transition: all 0.3s ease;
}

.nav-logo h2 {
    color: #2c5282;
    font-weight: 700;
    font-size: 1.5rem;
    margin: 0;
}

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

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2c5282;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #2c5282;
    transition: width 0.3s ease;
}

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

.language-switch {
    margin-left: 1rem;
}

.lang-btn {
    background: #2c5282;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.lang-btn:hover {
    background: #2a4975;
    transform: translateY(-1px);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #2c5282;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/><circle cx="25" cy="25" r="0.5" fill="white" opacity="0.05"/><circle cx="75" cy="75" r="0.8" fill="white" opacity="0.08"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: -1;
}

.hero-content {
    z-index: 1;
    color: white;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.cta-button {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    padding: 15px 40px;
    border-radius: 50px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* About Section */
.about {
    padding: 100px 0;
    background: #f8fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 3rem;
    color: #2c5282;
    margin-bottom: 2rem;
    font-weight: 700;
}

.about-description p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #4a5568;
}

.energy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.about-visual {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
}

.grid-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.grid-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.grid-item h3 {
    color: #2c5282;
    font-weight: 600;
    font-size: 1.1rem;
}

.interest-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: #2c5282;
    color: #fff;
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.interest-cta:hover {
    background: #2a4975;
    transform: translateY(-2px);
}

.interest-section {
    display: none;
    padding: 90px 0;
    background: #eef2f7;
}

.interest-section.is-visible {
    display: block;
}

.interest-form-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 14px 35px rgba(44, 82, 130, 0.12);
    padding: 2.2rem;
}

.interest-form-card h2 {
    color: #2c5282;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.interest-form h3 {
    color: #2c5282;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    margin-top: 1.2rem;
}

.interest-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.interest-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.interest-field-full {
    grid-column: 1 / -1;
}

.interest-field label {
    color: #334155;
    font-weight: 600;
}

.interest-field input,
.interest-field textarea {
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    padding: 11px 12px;
    font-size: 1rem;
    color: #1f2937;
    background: #fff;
}

.interest-field input:focus,
.interest-field textarea:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.interest-submit {
    margin-top: 1.3rem;
    background: #2c5282;
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.interest-submit:hover:not(:disabled) {
    background: #2a4975;
    transform: translateY(-1px);
}

.interest-submit:disabled {
    opacity: 0.75;
    cursor: not-allowed;
}

/* Contact Section */
.contact {
    background: #2c5282;
    color: white;
    padding: 80px 0 40px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    font-size: 1.2rem;
    color: #667eea;
    width: 20px;
}

.company-info {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.company-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.company-item i {
    font-size: 1.1rem;
    color: #667eea;
    width: 20px;
}

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

.contact-form h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 12px 15px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.contact-form button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.contact-form button:hover:not(:disabled) {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.contact-form button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-loading {
    display: none;
}

.contact-form button .fa-spinner {
    margin-right: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0.8;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .logo-img {
        height: 90px;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        backdrop-filter: blur(10px);
    }

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

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

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

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-text h2 {
        font-size: 2rem;
    }

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

    .interest-form-card {
        padding: 1.5rem;
    }

    .interest-form-card h2 {
        font-size: 1.35rem;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .about-text h2 {
        font-size: 1.5rem;
    }

    .grid-item {
        padding: 1.5rem;
    }
}