:root {
    --primary-color: #007bff; 
    --secondary-color: #6c757d; 
    --accent-color: #28a745; 
    --text-color-dark: #343a40;
    --text-color-light: #f8f9fa;
    --background-color-light: #ffffff;
    --background-color-dark: #f0f2f5; 
    --border-color: #dee2e6;

    --font-family-sans-serif: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-family-heading: 'Segoe UI', Roboto, 'Open Sans', sans-serif; 
}

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

body {
    font-family: var(--font-family-sans-serif);
    line-height: 1.6;
    color: var(--text-color-dark);
    background-color: var(--background-color-light);
}

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

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

a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-login {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
    cursor: pointer;
    border: none;
}

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

/* .btn-primary:hover {
    background-color: darken(var(--primary-color), 10%); 
    filter: brightness(90%); 
} */

.btn-secondary {
    background-color: var(--accent-color);
    color: var(--text-color-light);
}

.btn-secondary:hover {
    background-color: darken(var(--accent-color), 10%);
    filter: brightness(90%);
}

.btn-login {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 8px 18px; 
}

.btn-login:hover {
    background-color: var(--primary-color);
    color: var(--text-color-light);
}

/* Header & Navigation */
.navbar {
    background-color: var(--background-color-light);
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    display: flex;
    align-items: center;
}

.navbar .logo img {
    height: 40px; /* Adjust logo size */
    margin-right: 10px;
}

.navbar .logo h1 {
    font-size: 1.8em;
    color: var(--text-color-dark);
    font-family: var(--font-family-heading);
}

.navbar nav ul {
    list-style: none;
    display: flex;
}

.navbar nav ul li {
    margin-left: 25px;
}

.navbar nav ul li a {
    color: var(--text-color-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar nav ul li a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

/* Hero Section */
.hero {
    background-color: var(--background-color-dark); 
    padding: 80px 0;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap; 
    gap: 40px;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    text-align: left;
}

.hero-content h2 {
    font-size: 3em;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-family: var(--font-family-heading);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2em;
    margin-bottom: 30px;
    color: var(--text-color-dark);
}

.hero-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 60%;
    height: auto;
    border-radius: 8px; 
}

/* Features Section */
.features {
    padding: 60px 0;
    text-align: center;
    background-color: var(--background-color-light); 
}

.features h3 {
    font-size: 2.5em;
    color: var(--text-color-dark);
    margin-bottom: 40px;
    font-family: var(--font-family-heading);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    background-color: var(--background-color-dark);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.feature-item .icon {
    font-size: 3em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-item h4 {
    font-size: 1.5em;
    color: var(--text-color-dark);
    margin-bottom: 10px;
    font-family: var(--font-family-heading);
}

.feature-item p {
    color: var(--secondary-color);
    font-size: 0.95em;
}

/* Call to Action Section */
.call-to-action {
    background-color: var(--primary-color); 
    color: var(--text-color-light);
    padding: 60px 0;
    text-align: center;
}

.call-to-action h2 {
    font-size: 2.8em;
    margin-bottom: 20px;
    font-family: var(--font-family-heading);
}

.call-to-action p {
    font-size: 1.1em;
    margin-bottom: 30px;
}

.call-to-action .btn-secondary {
    background-color: var(--accent-color); 
    color: var(--text-color-light);
    border: none;
    padding: 15px 35px;
    font-size: 1.1em;
}

.call-to-action .btn-secondary:hover {
    background-color: darken(var(--accent-color), 10%);
    filter: brightness(90%);
}

/* Footer */
footer {
    background-color: var(--text-color-dark); 
    color: var(--text-color-light);
    padding: 30px 0;
    text-align: center;
    font-size: 0.9em;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

footer p {
    margin: 0;
}

.footer-links a {
    color: var(--text-color-light);
    margin-left: 20px;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
    }

    .navbar nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .navbar nav ul li {
        margin: 0 10px 10px 10px;
    }

    .hero .container {
        flex-direction: column-reverse; 
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .hero-content h2 {
        font-size: 2.2em;
    }

    .features h3 {
        font-size: 2em;
    }

    .call-to-action h2 {
        font-size: 2.2em;
    }

    footer .container {
        flex-direction: column;
        gap: 15px;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-links a {
        margin-left: 0;
    }
}