:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --bg-color: #fff;
    --light-bg: #f9f9f9;
    --dark-bg: #1a1a1a;
    --dark-text: #f4f4f4;
    --transition: all 0.3s ease;
}

.dark-mode {
    --text-color: #f4f4f4;
    --bg-color: #121212;
    --light-bg: #1e1e1e;
    --secondary-color: #3498db;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: var(--transition);
}

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

/* Header */
header {
    position: fixed;
    width: 100%;
    top: 0;
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

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

.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--light-bg);
    text-align: center;
    padding-top: 60px;
}

.hero-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--secondary-color);
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.about-text {
    flex: 1;
    min-width: 300px;
    padding-right: 30px;
    font-size: 1.1rem;
    text-align: left;
}

.about-text {
    width: 100%;
    margin-bottom: 40px;
    font-size: 1.1rem;
    text-align: left;
}

.hashtags {
    margin: 25px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.tag {
    display: inline-block;
    background-color: var(--light-bg);
    color: var(--primary-color);
    padding: 6px 14px;
    border-radius: 20px;
    margin: 5px 10px 5px 0;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.about-stats {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: stretch;
}

.stat-link {
    width: 30%;
    text-decoration: none;
    color: var(--text-color);
    margin-bottom: 20px;
    display: flex;
}

.stat-box {
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.stat-box img {
    max-width: 100%;
    max-height: 150px;
    object-fit: cover;
    margin-bottom: 10px;
}

.stat-link:hover .stat-box {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.stat-box h3 {
    font-size: 2rem;
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    padding: 30px 0;
    color: #fff;
}

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

.social-icons a {
    color: #fff;
    margin-left: 15px;
    font-size: 1.2rem;
    transition: var(--transition);
}

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

/* Animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in:nth-child(1) {
    animation-delay: 0.2s;
}

.fade-in:nth-child(2) {
    animation-delay: 0.4s;
}

.fade-in:nth-child(3) {
    animation-delay: 0.6s;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        padding: 20px;
    }
    
    nav ul {
        margin-top: 20px;
        margin-bottom: 20px;
    }
    
    nav ul li {
        margin-left: 15px;
        margin-right: 15px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text {
        padding-right: 0;
        margin-bottom: 30px;
    }
    
    .stat-box {
        width: 100%;
        margin-bottom: 20px;
    }
    
    .stat-link {
        width: 100%;
    }
    
    footer .container {
        flex-direction: column;
    }
    
    .social-icons {
        margin-top: 20px;
    }
}