@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700&family=Roboto:wght@400;700&display=swap');

:root {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --app-bg: #2a2a2a;
    --accent-color: #00e5ff;
    --secondary-bg: rgba(255, 255, 255, 0.05);
    --box-shadow: rgba(0, 0, 0, 0.5);
    --border-color: #444;
    --success-color: #00e5ff;
}

body.light-mode {
    --bg-color: #f8f9fa;
    --text-color: #343a40;
    --app-bg: #ffffff;
    --accent-color: #007bff;
    --secondary-bg: #f1f3f5;
    --box-shadow: rgba(0, 0, 0, 0.1);
    --border-color: #e9ecef;
    --success-color: #28a745;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    transition: all 0.3s;
}

#app {
    width: 100%;
    max-width: 900px;
    text-align: center;
    background: var(--app-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px var(--box-shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 3.5rem;
    color: var(--accent-color);
    letter-spacing: -1px;
    margin-bottom: 25px;
    transition: color 0.3s;
}

.video-container {
    margin: 30px 0 15px 0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 20px var(--box-shadow);
}

.video-playlist {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 35px;
}

.video-item {
    background: var(--secondary-bg);
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: flex-start; /* Align text to the left for better reading */
    gap: 5px;
}

.video-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 5px 15px var(--box-shadow);
}

.video-item.active {
    border-color: var(--accent-color);
    background: rgba(0, 229, 255, 0.1);
}

.video-item img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 5px;
}

.video-title {
    font-size: 0.95rem;
    font-weight: bold;
    color: var(--text-color);
    text-align: left;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.8;
    text-align: left;
}

.yt-link {
    font-size: 0.8rem;
    color: var(--accent-color);
    text-decoration: none;
    margin-top: 5px;
    padding: 5px 10px;
    border: 1px solid var(--accent-color);
    border-radius: 5px;
    transition: all 0.3s;
}

.yt-link:hover {
    background: var(--accent-color);
    color: white;
}

iframe {
    width: 100%;
    height: 450px;
    display: block;
}

.precautions {
    background: var(--secondary-bg);
    padding: 25px;
    border-radius: 10px;
    border-left: 5px solid var(--accent-color);
    text-align: left;
    margin-top: 35px;
}

.precautions h2 {
    color: var(--accent-color);
    font-family: 'Montserrat', sans-serif;
    font-size: 2rem;
    margin-bottom: 15px;
}

.precautions ul {
    list-style: disc;
    padding-left: 20px;
}

.precautions li {
    margin-bottom: 12px;
}

.closing-message {
    margin-top: 40px;
    font-size: 1.25rem;
    color: var(--success-color);
    font-weight: bold;
}

.back-link {
    display: inline-block;
    margin-top: 25px;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: bold;
    transition: color 0.3s;
}

.back-link:hover {
    filter: brightness(1.2);
    text-decoration: underline;
}

#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 15px;
    font-size: 1.5rem;
    background: var(--app-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--box-shadow);
    z-index: 1000;
    transition: all 0.3s;
}

#theme-toggle:hover {
    transform: scale(1.1);
}