/* Variables de colores - Modo claro */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --header-bg: linear-gradient(135deg, #3498db, #2c3e50);
    --nav-bg: #2c3e50;
    --section-border: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --control-bg: #ecf0f1;
    --control-text: #2c3e50;
}

/* Modo oscuro */
[data-theme="dark"] {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #1a252f;
    --text-color: #f0f0f0;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --header-bg: linear-gradient(135deg, #1a252f, #0d1117);
    --nav-bg: #1a252f;
    --section-border: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --control-bg: #2c3e50;
    --control-text: #f0f0f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 1000;
}

.control-btn {
    background-color: var(--control-bg);
    color: var(--control-text);
    border: none;
    padding: 8px 15px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
    box-shadow: 0 2px 5px var(--shadow-color);
}

#language-selector {
    appearance: none;
    padding-right: 30px;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 1em;
}

header {
    background: var(--header-bg);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    margin-bottom: 30px;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

nav {
    background-color: var(--nav-bg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px var(--shadow-color);
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
    padding: 15px 0;
}

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 10px 0;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

nav ul li a:hover::after {
    width: 100%;
}

.section {
    padding: 60px 0;
}

.section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.2rem;
    position: relative;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color);
}

.project-image {
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-info {
    padding: 20px;
}

.project-info h3 {
    margin-bottom: 10px;
    color: var(--text-color);
}

.project-info p {
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 15px;
}

.download-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

.download-btn:hover {
    background-color: var(--primary-dark);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 25px;
    border-radius: 50px;
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: transform 0.3s, box-shadow 0.3s;
}

.social-btn i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.youtube {
    background-color: #FF0000;
}

.tiktok {
    background-color: #000000;
}

.github {
    background-color: #333333;
}

@media (max-width: 768px) {
    header {
        padding: 60px 0;
    }
    
    header h1 {
        font-size: 2.2rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 5px 0;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .social-btn {
        width: 100%;
        justify-content: center;
    }
    
    .controls {
        top: 10px;
        right: 10px;
    }
}