/* Reset y configuración base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

/* Main content */
.main {
    padding: 40px 0;
}

/* Hero section */
.hero {
    text-align: center;
    margin-bottom: 60px;
}

.hero-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 60px 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}

/* Materials section */
.materials {
    margin-bottom: 60px;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.material-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: white;
}

.material-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.material-card p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Instructions section */
.instructions {
    margin-bottom: 60px;
}

.instructions h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.instructions-list {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.instruction-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    border-radius: 15px;
    transition: background-color 0.3s ease;
}

.instruction-item:hover {
    background: rgba(102, 126, 234, 0.05);
}

.instruction-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.instruction-item p {
    font-size: 1.1rem;
    color: #333;
    line-height: 1.6;
    margin: 0;
}

/* Contact section */
.contact {
    margin-bottom: 40px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 50px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 2px solid rgba(102, 126, 234, 0.2);
}

.contact-card h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.contact-card p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
}

.contact-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 600;
}

.contact-info i {
    color: #667eea;
    font-size: 1.5rem;
}

.contact-info a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: #764ba2;
}

.contact-note {
    background: rgba(102, 126, 234, 0.1);
    padding: 15px;
    border-radius: 10px;
    font-size: 0.95rem;
    color: #555;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.contact-note i {
    color: #667eea;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 20px 0;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* Animación para el cursor parpadeante */
@keyframes blink {
    0%, 50% { border-color: #667eea; }
    51%, 100% { border-color: transparent; }
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-content {
        padding: 40px 20px;
    }
    
    .materials-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .material-card {
        padding: 30px 20px;
    }
    
    .instructions h2 {
        font-size: 2rem;
    }
    
    .instructions-list {
        padding: 30px 20px;
    }
    
    .instruction-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .contact-card {
        padding: 30px 20px;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .contact-note {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}