:root {
    /* Light Theme Variables */
    --light-bg-primary: #f8f9fa;
    --light-bg-secondary: #ffffff;
    --light-text-primary: #212529;
    --light-text-secondary: #6c757d;
    --light-accent: #4361ee;
    --light-accent-hover: #3a56d4;
    --light-border: #dee2e6;
    --light-shadow: rgba(0, 0, 0, 0.1);
    --light-card-bg: #ffffff;

    /* Dark Theme Variables */
    --dark-bg-primary: #121212;
    --dark-bg-secondary: #1e1e1e;
    --dark-text-primary: #f8f9fa;
    --dark-text-secondary: #adb5bd;
    --dark-accent: #4361ee;
    --dark-accent-hover: #4f6ef2;
    --dark-border: #343a40;
    --dark-shadow: rgba(0, 0, 0, 0.3);
    --dark-card-bg: #2a2a2a;

    /* Font */
    --font-sans: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    
    /* Transitions */
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: var(--accent);
    transition: all var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

/* Theme Specific Styles */
body.light-theme {
    background-color: var(--light-bg-primary);
    color: var(--light-text-primary);
}

body.dark-theme {
    background-color: var(--dark-bg-primary);
    color: var(--dark-text-primary);
}

/* Light Theme */
.light-theme {
    --bg-primary: var(--light-bg-primary);
    --bg-secondary: var(--light-bg-secondary);
    --text-primary: var(--light-text-primary);
    --text-secondary: var(--light-text-secondary);
    --accent: var(--light-accent);
    --accent-hover: var(--light-accent-hover);
    --border: var(--light-border);
    --shadow: var(--light-shadow);
    --card-bg: var(--light-card-bg);
}

/* Dark Theme */
.dark-theme {
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --accent: var(--dark-accent);
    --accent-hover: var(--dark-accent-hover);
    --border: var(--dark-border);
    --shadow: var(--dark-shadow);
    --card-bg: var(--dark-card-bg);
}

/* Header Styles */
header {
    background-color: var(--bg-secondary);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition);
    padding: 1rem 0;
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

nav a {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
}

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

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent);
    transition: width var(--transition);
}

nav a:hover::after, nav a.active::after {
    width: 100%;
}

/* Theme Toggle Button */
.theme-toggle button {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    transition: background-color var(--transition);
}

.theme-toggle button:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .theme-toggle button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.fa-sun, .fa-moon {
    font-size: 1.2rem;
    transition: opacity var(--transition), transform var(--transition);
}

.light-theme .fa-moon {
    opacity: 0.5;
}

.dark-theme .fa-sun {
    opacity: 0.5;
}

.fa-sun {
    color: #f9ca24;
}

.fa-moon {
    color: #f1c40f;
}

.dark-theme .fa-moon {
    color: #f1c40f;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(to bottom right, var(--bg-primary), var(--bg-secondary));
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: linear-gradient(45deg, var(--accent), #6c5ce7);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

/* Dashboard Preview */
.dashboard-preview {
    width: 100%;
    height: 350px;
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 10px 30px var(--shadow);
    overflow: hidden;
    position: relative;
}

.placeholder-image {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    font-weight: bold;
    background: linear-gradient(45deg, var(--bg-primary), var(--bg-secondary));
}

/* Features Section */
.features {
    padding: 5rem 0;
    background-color: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: "";
    position: absolute;
    width: 80px;
    height: 3px;
    background: var(--accent);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 2rem;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 5px 15px var(--shadow);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 25px var(--shadow);
}

.feature-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

/* How It Works Section */
.how-it-works {
    padding: 5rem 0;
}

.steps {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 1.5rem;
    border-radius: 10px;
    background-color: var(--card-bg);
    box-shadow: 0 5px 15px var(--shadow);
    transition: transform var(--transition);
}

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

.step-number {
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background-color: var(--accent);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    background: linear-gradient(45deg, var(--accent), #6c5ce7);
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background-color: var(--light-bg-primary);
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background-color: var(--bg-primary);
}

.faq-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 2rem;
}

.faq-item {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 5px 15px var(--shadow);
}

.faq-item h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    padding: 3rem 0 1rem;
    color: var(--text-primary);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 2rem;
    gap: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo h2 {
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.footer-links {
    display: flex;
    flex: 2;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.link-group h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 0.5rem;
}

.link-group a {
    color: var(--text-secondary);
}

.link-group a:hover {
    color: var(--accent);
}

.copyright {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .logo {
        text-align: center;
    }
    
    .faq-items {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        width: 100%;
    }

    /* Adjust header sizes */
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .tagline {
        font-size: 0.8rem;
    }
    
    /* Hero section adjustments */
    .hero {
        padding: 3rem 0;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    /* Feature cards adjustments */
    .feature-card {
        padding: 1.5rem;
    }
    
    .feature-icon {
        font-size: 1.75rem;
    }
}

/* Additional tweaks for very small screens */
@media (max-width: 480px) {
    /* Further reduce header size */
    .logo h1 {
        font-size: 1.2rem;
    }
    
    /* More compact layout */
    .container {
        padding: 0 10px;
        width: 95%;
    }
    
    /* Smaller hero section */
    .hero {
        padding: 2.5rem 0;
    }
    
    .hero h2 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .hero p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    /* Adjust sections padding */
    .features, .faq {
        padding: 3rem 0;
    }
    
    /* Smaller feature cards */
    .feature-cards {
        gap: 1rem;
    }
    
    .feature-card {
        padding: 1.25rem;
    }
    
    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }
    
    /* Adjust navigation links */
    nav ul {
        gap: 0.75rem;
    }
    
    nav a {
        font-size: 0.9rem;
    }
    
    /* Footer adjustments */
    footer {
        padding: 2rem 0 1rem;
    }
}