/* Base styles */
:root {
    --card-width: min(100%, 500px);
    --card-height: min(300px, 70vh);
    --card-padding: clamp(10px, 3vw, 20px);
}

body {
    font-family: 'Montserrat', sans-serif;
}

.intro-card {
    width: var(--card-width);
    height: var(--card-height);
    background-color: white;
    border: 1px solid black;
    border-radius: 10px;
    padding: var(--card-padding);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: black;
}

.card-container {
    perspective: 1000px;
    width: var(--card-width);
    height: var(--card-height);
    margin: 0 auto;
    touch-action: manipulation;
}

.flashcard {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--card-padding);
    text-align: center;
    border-radius: 10px;
    font-size: clamp(1.5rem, 3vw, 2rem);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    font-family: 'Montserrat', sans-serif;
}

.card-front {
    background-color: white;
    border: 1px solid black;
    color: black;
    font-size: 18px;
}

.card-back {
    transform: rotateY(180deg);
    background-color: #1ea0f2;
    color: white;
    border: 1px solid #1ea0f2;
    font-size: 18px;
}

/* Progress bar and text styles */
.progress-container {
    margin: 20px auto;
    width: var(--card-width);
    text-align: center;
}

.progress {
    margin-bottom: 10px;
}

.progress-text {
    color: black;
    font-size: 14px;
    margin-top: 5px;
    font-family: 'Montserrat', sans-serif;
}

.controls {
    margin: 20px auto;
    width: var(--card-width);
    display: flex;
    justify-content: center;
    gap: clamp(5px, 2vw, 10px);
    flex-wrap: wrap;
}

.controls .btn {
    min-width: 120px;
    padding: 0.5rem 1rem;
    font-size: clamp(0.875rem, 2vw, 1rem);
    font-family: 'Montserrat', sans-serif;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .controls {
        padding: 0 10px;
    }
}

/* Touch device optimizations */
@media (hover: none) {
    .flashcard {
        cursor: default;
    }
}

.embed-container {
    padding: var(--card-padding);
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
}

.embed-code {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    color: black;
    border: 1px solid #dee2e6;
    font-family: 'Montserrat', sans-serif;
}