/* --- Nightmode Color & Font Variables --- */
:root {
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #387ADF; /* A vibrant blue */
    --primary-hover: #5292f7;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --border-color: #333;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --- Basic Setup --- */
body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-primary);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 900px; /* Wider container for a tile layout */
    margin: 0 auto;
    background: var(--surface-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

h2 {
    text-align: center;
}

/* --- 1. Main Category Page --- */
#main-categories {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.main-btn {
    display: block;
    width: 100%;
    padding: 18px;
    font-size: 1.1rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    background-color: #252525;
    color: var(--text-primary);
}

.main-btn:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
}

.section-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 10px 0;
}

#sub-category-main {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sub-main-btn {
    display: block;
    width: 100%;
    padding: 16px;
    font-size: 1rem;
    font-weight: 600;
    border: 1px solid var(--primary-color);
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    background-color: var(--primary-color);
    color: white;
}

.sub-main-btn:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
}


/* --- 2. Content Area --- */
.nav-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

#back-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    margin-right: 15px;
    transition: all 0.2s ease;
}

#back-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

#content-title {
    margin: 0;
    font-size: 1.8rem;
    text-transform: capitalize;
}

/* Search Bar */
#search-bar {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    background-color: #252525;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    box-sizing: border-box;
    transition: border-color 0.2s ease;
}

#search-bar:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Filters and Sort */
.filter-controls, .sort-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-btn, .sort-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-secondary);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sort-controls {
    align-items: center;
}

.filter-btn:hover, .sort-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Active state for buttons */
.filter-btn.active, .sort-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    font-weight: 500;
}

/* --- 3. Link Tile Grid Layout --- */
#links-container {
    display: grid;
    /* CHANGED: minmax(150px, 1fr) ensures at least 2 columns on mobile */
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

.link-card {
    background-color: #252525;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px; /* CHANGED: Reduced padding */
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column; /* Stack content vertically */
    align-items: center; /* Center content */
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.link-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.link-card img {
    width: 60px; /* CHANGED: Reduced image size */
    height: 60px; /* CHANGED: Reduced image size */
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 12px; /* CHANGED: Reduced margin */
    border: 2px solid var(--border-color);
}

.link-card-info {
    flex-grow: 1;
}

.link-card-info h3 {
    margin: 0 0 8px 0;
    font-size: 1.05rem; /* CHANGED: Reduced font size */
    color: var(--text-primary);
}

.link-card-info p {
    margin: 0 0 10px 0;
    font-size: 0.85rem; /* CHANGED: Reduced font size */
    color: var(--text-secondary);
    line-height: 1.4;
}

.link-card-info .followers {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-color);
}

/* Utility Class */
.hidden {
    display: none !important;
}

/* --- Announcement Banner --- */
#announcement-banner {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 16px 20px;
    border-radius: 10px;
    margin-bottom: 24px;
    border: 1px solid var(--primary-hover);
    box-shadow: 0 4px 15px rgba(56, 122, 223, 0.2);
}

#announcement-banner h4 {
    margin: 0 0 5px 0;
    font-size: 1.1rem;
    color: #ffffff;
    font-weight: 600;
}

#announcement-banner p {
    margin: 0;
    font-size: 0.95rem;
    color: #f0f0f0;
    line-height: 1.5;
}