.donde-estoy {
    background-color: var(--color-noble-gas);
    min-height: 100vh;
    padding: 2rem 0;
    width: 100%;
    overflow: visible;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
    overflow: visible;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.donde-estoy h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 4rem;
    padding: 0 1rem;
}

.intro-text {
    text-align: center;
    margin-bottom: 2rem;
    color: #2c3e50;
    font-size: 1.2rem;
    padding: 0 1rem;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 2rem 0;
    width: 100%;
    overflow: visible;
    flex: 1;
}

.card {
    aspect-ratio: 1/1;
    perspective: 1000px;
    cursor: pointer;
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.element-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0);
}

.element-number {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    position: absolute;
    top: 1rem;
}

.element-symbol {
    color: white;
    font-size: 5rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    border-radius: 1rem;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.card:hover .card-inner {
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
}

.card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card.flipped .element-overlay {
    opacity: 0;
    background: rgba(255, 255, 255, 0.8);
}

.card.flipped .element-symbol {
    transform: scale(1.2);
    opacity: 0;
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 1rem;
    overflow: hidden;
}

.card-front {
    background-color: #fff;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border: 12px solid var(--color-nonmetal);
}

.card-front::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover .card-front img {
    transform: scale(1.1);
}

.card.flipped .card-front {
    filter: brightness(1.2);
}

.card.flipped .card-front::after {
    opacity: 0;
}

.card-back {
    background-color: #fff;
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    text-align: center;
}

.card-back h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card-back p {
    color: #34495e;
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.author-credit {
    font-size: 0.8rem !important;
    color: #95a5a6 !important;
    margin-top: auto !important;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .donde-estoy h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }

    .intro-text {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .cards-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }
    
    .card-front {
        border-width: 10px;
    }
    
    .element-symbol {
        font-size: 4.5rem;
    }
}

@media (max-width: 1200px) {
    .container {
        padding: 0 2rem;
    }
    
    .cards-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }
    
    .card {
        max-width: 350px;
    }
}

@media (max-width: 992px) {
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .card-front {
        border-width: 8px;
    }
    
    .element-symbol {
        font-size: 4rem;
    }
    
    .card-back h3 {
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .element-symbol {
        font-size: 3.5rem;
    }
    
    .element-number {
        font-size: 1.2rem;
    }
    
    .card-back h3 {
        font-size: 1.3rem;
    }
    
    .card-back p {
        font-size: 0.95rem;
    }
    
    .card-front {
        border-width: 6px;
    }
    
    .intro-text {
        font-size: 1.1rem;
        padding: 0 0.5rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 1rem;
    }
    
    .cards-container {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin: 0 auto;
        gap: 1.5rem;
    }
    
    .card {
        max-width: 100%;
    }
    
    .element-symbol {
        font-size: 3.2rem;
    }
    
    .element-number {
        font-size: 1.1rem;
    }
    
    .card-back h3 {
        font-size: 1.4rem;
        margin-bottom: 1.2rem;
    }
    
    .card-back p {
        font-size: 1.1rem;
        line-height: 1.6;
        margin-bottom: 1.2rem;
    }
    
    .author-credit {
        font-size: 0.9rem !important;
    }
    
    .intro-text {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .card-front {
        border-width: 8px;
    }
}

@media (max-width: 360px) {
    .cards-container {
        max-width: 280px;
    }
    
    .element-symbol {
        font-size: 2.8rem;
    }
    
    .element-number {
        font-size: 1rem;
    }
    
    .card-back h3 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
    }
    
    .card-back p {
        font-size: 1rem;
        line-height: 1.5;
        margin-bottom: 1rem;
    }
    
    .author-credit {
        font-size: 0.85rem !important;
    }
    
    .card-front {
        border-width: 6px;
    }
}