/* Custom Variables */
:root {
    /* Colors */
    --background-color: #f5f5f5;
    --text-color: #2c2c2c;
    --card-color: DarkSalmon;
    --hover-color: brown;

    --font-family: Times, serif;
    --font-size-large: 3em;
    --font-size-medium: 2.2em;
    --font-size-normal: 1.5em;
    --font-size-small: 1em;

    --border-radius: 8px;
    --padding-large: 40px;
    --padding-medium: 30px;
    --padding-small: 20px;
    --margin-large: 40px;
    --margin-medium: 30px;
    --margin-small: 20px;

    --transition-fast: 0.3s ease;
    --transition-medium: 0.6s ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: var(--padding-small);
    min-height: 100vh;
    background: var(--background-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
}



.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--padding-small);
}

.header {
    text-align: center;
    margin-bottom: var(--margin-large);
    background: var(--card-color);
    padding: var(--padding-medium);
    border-radius: var(--border-radius);
}

.header h1 {
    margin: 0 0 var(--margin-small);
    font-size: var(--font-size-large);
    font-weight: 700;
}

.subtitle {
    font-size: var(--font-size-small);
    opacity: 0.7;
}
.back-link {
    display: inline-block;
    margin-left: var(--margin-small);
    padding: 50px var(--padding-small);
    background: var(--text-color);
    color: var(--card-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background var(--transition-fast);
}

.back-link:hover {
    background: var(--hover-color);
}

.nav-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--margin-small) 0;
    background: var(--card-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.nav-table th {
    background: var(--text-color);
    color: var(--card-color);
    padding: var(--padding-small);
    font-size: 3em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-link {
    display: block;
    padding: 25px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 2.5em;
    transition: background var(--transition-fast), color var(--transition-fast);
}

body.home .nav-link:hover {
    background: var(--hover-color);
    color: var(--card-color);
}


.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--margin-medium);
}

.flip-card {
    height: 300px;
    perspective: 1000px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform var(--transition-medium);
    transform-style: preserve-3d;
    border-radius: var(--border-radius);
}

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

.flip-card-front,
.flip-card-back {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--padding-small);
    border-radius: var(--border-radius);
    backface-visibility: hidden;
}

.flip-card-front {
    background: var(--text-color);
    color: var(--card-color);
}

.flip-card-back {
    background: var(--card-color);
    color: var(--text-color);
    transform: rotateY(180deg);
}

.card-content h3 {
    font-size: var(--font-size-medium);
    margin-bottom: 5px;
}

.card-content p {
    margin: 0;
}


.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--margin-medium);
}

.video-card {
    background: var(--card-color);
    padding: 45px;
    border-radius: var(--border-radius);
}

.video-card h3,
.video-card p {
    text-align: center;
}

.video-container {
    position: relative;
    padding-bottom: 50%;
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.video-container iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: black;
}


body.home {
    display: flex;
    justify-content: left;
}

body.home .container {
    max-width: 800px;
    background: var(--card-color);
    text-align: center;
}


.back-link:focus,
.nav-link:focus {
    outline: 2px solid var(--text-color);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
    }
}

@media (max-width: 768px) {

    .videos-grid,
    .cards-grid {
        grid-template-columns: 1fr;
    }

    .flip-card {
        height: 240px;
    }

    .header h1 {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
    .flip-card {
        height: 220px;
    }

    .nav-link {
        padding: 40px;
        font-size: 5em;
    }
}