/* General Styles */
:root {
    --primary-color: #00A699; /* Teal/Green from the image */
    --secondary-color: #2c3e50; /* Dark blue/grey */
    --light-bg: #f8f9fa;
    --text-color: #34495e;
    --hero-bg-color: #ffffff; 
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: var(--light-bg);
    color: var(--text-color);
    scroll-behavior: smooth;
}

h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--secondary-color);
}

p {
    line-height: 1.7;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

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

/* Header */
header {
    background-color: #ffffff;
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
}

nav ul li a {
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Mobile menu toggle button */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--secondary-color);
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--hero-bg-color);
}

.hero-content {
    max-width: 50%;
    transform: translateY(-50px);
}

.hero-content h1 {
    font-size: 3.2rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.cta-button {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    transition: background-color 0.3s, transform 0.3s;
    display: inline-block;
}

.cta-button:hover {
    background-color: #007d72;
    color: white;
    transform: translateY(-3px);
}

/* Sections */
main section {
    padding: 5rem 2rem;
    text-align: center;
}

h2 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
}

.subtitle {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    font-size: 1.1rem;
    color: #555;
}

/* Why Us Section */
.why-us-section {
    background-color: #ffffff;
}
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature {
    background: var(--light-bg);
    padding: 2.5rem;
    border-radius: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.feature:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* How It Works Section */
.how-it-works-section .steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: left;
}

.step {
    padding: 1.5rem;
}

.step h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* Battery Focus Section */
.battery-focus-section {
    background-color: #ffffff;
}

.battery-focus-section ul {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 2rem auto 0 auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.battery-focus-section li {
    background: url('https://img.icons8.com/material-rounded/24/00A699/checkmark--v1.png') no-repeat left center;
    padding-left: 35px;
    font-size: 1.1rem;
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 3rem auto 0 auto;
    text-align: left;
}

.benefit {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-left: 5px solid var(--primary-color);
}

.benefit h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Use Cases Section */
.use-cases-section {
    padding: 5rem 0;
    background: #fff;
}

.use-cases-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.use-case {
    background: var(--light-bg);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.04);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.use-case:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 24px rgba(44, 62, 80, 0.10);
}

.use-case .feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.use-case h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    color: var(--secondary-color);
}

.use-case p {
    font-size: 1.05rem;
    color: var(--text-color);
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: #ecf0f1;
    padding: 4rem 2rem 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 3rem auto;
    text-align: left;
}

.footer-about h3, .footer-links h3, .footer-contact h3 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.footer-about p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: #bdc3c7;
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #bdc3c7;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact p {
     color: #bdc3c7;
}

.footer-contact a {
    color: #bdc3c7;
    text-decoration: underline;
}
.footer-contact a:hover {
    color: white;
}

.social-media {
    margin-top: 1rem;
}

.social-media a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background-color: #34495e;
    color: white;
    margin-right: 0.5rem;
    font-size: 1rem;
}

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


.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    font-size: 0.9rem;
    color: #bdc3c7;
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 3rem;
    }

    .hero-image {
        order: 1; /* Image on top */
        margin-bottom: 2rem;
    }

    nav {
        align-items: flex-start;
    }

    nav ul {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
        margin-top: 1rem;
    }

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

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1.5rem;
    }

    nav ul {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.8rem;
    }

    h2 {
        font-size: 2.4rem;
    }
} 

/* Media Queries for Responsive Design */
@media (max-width: 1024px) {
    /* Tablet styles */
    .container {
        padding: 0 1.5rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-menu li {
        width: auto;
    }
    
    .nav-menu li a {
        font-size: 1.5rem;
        font-weight: 500;
        color: var(--secondary-color);
        border: none;
        padding: 1rem 2rem;
        display: block;
        text-align: center;
        transition: all 0.3s ease;
    }
    
    .nav-menu li a:hover {
        color: var(--primary-color);
        background: var(--light-bg);
        border-radius: 8px;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 3rem 0;
    }
    
    .hero-content {
        max-width: 100%;
        transform: none;
        margin-bottom: 2rem;
    }
    
    .hero-image {
        max-width: 80%;
        margin: 0 auto;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .feature {
        padding: 2rem;
    }
    
    nav {
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {
    /* Phone styles */
    .container {
        padding: 0 1rem;
    }
    
    nav {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 3rem 2rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-menu li {
        width: auto;
    }
    
    .nav-menu li a {
        font-size: 1.5rem;
        font-weight: 500;
        color: var(--secondary-color);
        border: none;
        padding: 1rem 2rem;
        display: block;
        text-align: center;
        transition: all 0.3s ease;
    }
    
    .nav-menu li a:hover {
        color: var(--primary-color);
        background: var(--light-bg);
        border-radius: 8px;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 2rem 0;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 1rem;
    }
    
    .hero p {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .hero-content {
        max-width: 100%;
        transform: none;
        margin-bottom: 2rem;
    }
    
    .hero-image {
        max-width: 100%;
        margin: 0 auto;
    }
    
    .cta-button {
        padding: 1rem 2rem;
        font-size: 1rem;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
        display: block;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature {
        padding: 1.5rem;
        text-align: center;
    }
    
    .feature-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .feature h3 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
    }
    
    .feature p {
        font-size: 1rem;
    }
    
    .why-us-section, .how-it-works-section, .benefits-section {
        padding: 3rem 0;
    }
    
    .why-us-section h2, .how-it-works-section h2, .benefits-section h2 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .how-it-works-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .work-step {
        padding: 1.5rem;
        text-align: center;
    }
    
    .work-step h3 {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }
    
    footer {
        padding: 2rem 0;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .footer-section {
        margin-bottom: 1.5rem;
    }
    
    .footer-section h4 {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }
    
    .social-media a {
        width: 45px;
        height: 45px;
        line-height: 45px;
        font-size: 1.2rem;
        margin: 0.25rem;
    }
}

@media (max-width: 480px) {
    /* Small phone styles */
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .logo {
        font-size: 1.6rem;
    }
    
    .feature {
        padding: 1rem;
    }
    
    .feature-icon {
        font-size: 2rem;
    }
    
    .cta-button {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .why-us-section h2, .how-it-works-section h2, .benefits-section h2 {
        font-size: 1.8rem;
    }
    
    .work-step {
        padding: 1rem;
    }
} 

@media (max-width: 1024px) {
    .use-cases-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .use-cases-section {
        padding: 3rem 0;
    }
}