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

body {
    font-family: 'Roboto Mono', monospace;
    margin: 0;
    padding: 0;
    background-color: #000000;
    color: #e0e0e0;
}


main {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 50px;
    gap: 20px;
    width: 100%;
}

#lessons-nav {
    width: 90%;
    max-width: 900px;
    background-color: transparent;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

#lessons-nav h2 {
    color: #666;
    text-align: center;
}

#lesson-spis {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    justify-content: center;
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

#lesson-spis li {
    margin-bottom: 0;
}

#lesson-spis li a {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 180px;
    padding: 10px;
    text-decoration: none;
    color: #e0e0e0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(15px);
    background-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(173, 138, 255, 0.37);
    transition: all 0.3s ease;
    text-align: center;
    overflow: hidden;
    position: relative;
}

#lesson-spis li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

#lesson-spis li a:hover::before {
    opacity: 1;
}

#lesson-spis li a:hover {
    background-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 40px 0 rgba(240, 240, 240, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-8px);
}

#lesson-content {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    overflow-y: auto;
    padding: 20px;
    display: none;
    flex-direction: column;
    align-items: center;
}

#lesson-content.active {
    display: flex;
}

#back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    background: none;
    border: none;
    color: #e0e0e0;
    font-size: 2em;
    cursor: pointer;
    z-index: 1001;
}

#back-button:hover {
    color: #fff;
}

.lesson-content-wrapper {
    width: 80%;
    max-width: 800px;
    background-color: #1a1a1a;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(102,102,102,0.5);
    margin-top: 50px;
}

.task-item {
    margin-bottom: 15px;
    padding: 15px;
    border: 1px solid #666;
    border-radius: 8px;
    background-color: #2a2a2a;
    box-shadow: 0 0 5px rgba(102,102,102,0.3);
}

.task-item h3 {
    color: #666;
    margin-top: 0;
}

.task-item p {
    color: #e0e0e0;
}

.task-item pre {
    background-color: #0a0a0a;
    color: #666;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
    border: 1px solid #666;
}

.code-toggle {
    background-color: #666;
    color: #0a0a0a;
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
    font-family: 'Roboto Mono', monospace;
    font-weight: bold;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.code-toggle:hover {
    background-color: #444;
    box-shadow: 0 0 10px rgba(102,102,102,0.7);
}

.code-content {
    display: none;
    margin-top: 15px;
    padding: 15px;
    background-color: #2a2a2a;
    border: 1px dashed #666;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(102,102,102,0.3);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

.code-content.active {
    max-height: 500px;
    padding: 10px;
    background-color: #0a0a0a;
    color: #666;
    border-radius: 5px;
    overflow-x: auto;
    border: 1px solid #666;
    display: block;
}

.copy-button {
    background-color: #666;
    color: #0a0a0a;
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
    margin-left: 10px;
    font-family: 'Roboto Mono', monospace;
    font-weight: bold;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.copy-button:hover {
    background-color: #444;
    box-shadow: 0 0 10px rgba(102,102,102,0.7);
}