:root {
    --primary-bg: #f4f7f6;
    --secondary-bg: #ffffff;
    --text-color: #333;
    --border-color: #e0e0e0;
    --accent-color: #007bff;
    --accent-hover-color: #0056b3;
    --row-even-bg: #f9f9f9;
    --row-odd-bg: #ffffff;
    --row-hover-bg: #e9ecef;
    --description-bg: #f0f0f0;
    --shadow-color: rgba(0, 0, 0, 0.1);

    --font-family: 'Roboto', sans-serif;
}

body.dark-mode {
    --primary-bg: #1a1a2e;
    --secondary-bg: #16213e;
    --text-color: #e0e0e0;
    --border-color: #3a3a5e;
    --accent-color: #5a90e3;
    --accent-hover-color: #7daeef;
    --row-even-bg: #1f2a40;
    --row-odd-bg: #16213e;
    --row-hover-bg: #2c3954;
    --description-bg: #25304a;
    --shadow-color: rgba(255, 255, 255, 0.05);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--secondary-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 8px 25px var(--shadow-color);
    transition: background-color 0.3s ease;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

header h1 {
    font-size: 2em;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.filter-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

#category-filter {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    font-size: 0.9em;
    cursor: pointer;
    min-width: 200px;
}

#darkModeToggle {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1em;
    transition: background-color 0.2s ease, color 0.2s ease;
}

#darkModeToggle:hover {
    background-color: var(--border-color);
}

.program-list-header {
    display: flex;
    font-weight: 700;
    padding: 12px 15px;
    border-bottom: 2px solid var(--accent-color);
    background-color: var(--primary-bg);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.program-list-header div {
    padding: 0 10px;
}

.header-lp { flex: 0 0 50px; text-align: left; }
.header-icon { flex: 0 0 70px; text-align: center; }
.header-name { flex: 1 1 35%; }
.header-category { flex: 1 1 25%; }
.header-download { flex: 0 0 130px; text-align: center; }


.program-item {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
    cursor: pointer;
}

.program-item:last-child {
    border-bottom: none;
}

.program-item:nth-child(odd) .program-row {
    background-color: var(--row-odd-bg);
}
.program-item:nth-child(even) .program-row {
    background-color: var(--row-even-bg);
}

.program-item:hover .program-row {
    background-color: var(--row-hover-bg);
}

.program-row {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    transition: background-color 0.2s ease;
}

.program-row > div {
    padding: 0 10px;
    display: flex;
    align-items: center;
}

.program-lp {
    flex: 0 0 50px;
    font-weight: 500;
    text-align: left;
}

.program-icon {
    flex: 0 0 70px;
    text-align: center;
}
.program-icon img {
    width: 32px;
    height: 32px;
    vertical-align: middle;
    border-radius: 4px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.program-name {
    flex: 1 1 35%;
    font-weight: 500;
}

.program-category {
    flex: 1 1 25%;
    font-size: 0.9em;
    opacity: 0.8;
}

.program-download {
    flex: 0 0 130px;
    text-align: center;
}

.download-button {
    background-color: var(--accent-color);
    color: white;
    padding: 8px 15px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9em;
    font-weight: 500;
    display: inline-block;
    transition: background-color 0.2s ease, transform 0.1s ease;
    border: none;
}

.download-button:hover {
    background-color: var(--accent-hover-color);
    transform: translateY(-1px);
}

.program-description {
    max-height: 0;
    overflow: hidden;
    background-color: var(--description-bg);
    padding: 0 20px;
    font-size: 0.95em;
    transition: max-height 0.4s cubic-bezier(0.25, 0.1, 0.25, 1), padding 0.4s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.3s ease;
    opacity: 0;
    border-top: 1px dashed var(--border-color);
}

.program-description p {
    padding: 15px 0;
}

.program-item.expanded .program-description {
    max-height: 200px; /* Adjust as needed */
    padding: 10px 20px;
    opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    .controls {
        width: 100%;
        margin-top: 15px;
        flex-direction: column;
        align-items: flex-start;
    }
    #category-filter {
        width: 100%;
    }
    .program-list-header {
        display: none; /* Hide header on small screens, rely on item labels */
    }
    .program-row {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px;
    }
    .program-row > div {
        padding: 5px 0;
        width: 100%; /* Make each cell full width */
    }
    .program-icon { justify-content: flex-start; }
    .program-category { margin-bottom: 8px; }
    .program-download { text-align: left; margin-top: 5px; }
    .download-button { width: auto; display: inline-block; }

    .header-lp, .program-lp,
    .header-icon, .program-icon {
        /* Można ukryć lub zmniejszyć na mobilnych jak za dużo */
    }
}