/* =================================================================
Modern CSS for Link Aggregator Site (Scrollable Cards Version)
=================================================================
* Uses CSS variables for easy theming and consistency.
* Modern system font stack for better performance and native feel.
* Enhanced transitions and hover effects for a smoother UX.
* Fully responsive design with refined dark mode.
* NEW: Header now uses a responsive background image.
* NEW: Link lists within cards are now scrollable.
* NEW: Red accents for nav bar and dividers.
=================================================================
*/

/* 1. Root Variables for Theming
-------------------------------------------------------------- */
:root {
    /* Color Palette */
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    /* NEW: Red accent color */
    --accent-red: #d32f2f;
    --accent-red-darker: #b71c1c;
    --header-bg: #0056b3;
    --text-light: #ffffff;
    --text-dark: #333333;
    --text-muted: #666666;
    --bg-light: #f7f9fc;
    --card-bg-light: #ffffff;
    --border-light: #e0e0e0;
    --success-color: #28a745;
    --error-color: #dc3545;
    --scrollbar-thumb-light: #cccccc;

    /* Dark Mode Palette */
    --bg-dark: #121212;
    --card-bg-dark: #1e1e1e;
    --text-dark-mode: #e0e0e0;
    --border-dark: #444444;
    --primary-dark-mode: #88ccff;
    --scrollbar-thumb-dark: #555555;

    /* Typography */
    --font-sans-serif:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
        sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";

    /* Transitions & Shadows */
    --transition-speed: 0.3s;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* 2. General Body & Layout
-------------------------------------------------------------- */
body {
    font-family: var(--font-sans-serif);
    margin: 0;
    padding: 0;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5; /* Reduced line-height for compactness */
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease;
}

main#app {
    max-width: 1200px;
    margin: 1.5rem auto; /* Reduced top/bottom margin */
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem; /* Reduced gap */
}

/* 3. Header & Navigation
-------------------------------------------------------------- */
header {
    /* The background color is now a fallback for the image */
    background-color: var(--header-bg);
    /* IMPORTANT: This now points to a local image.
      1. Create a folder named 'assets' in the same directory as your index.html.
      2. Place your 1200x200 image inside the 'assets' folder.
      3. Rename 'your-image.png' to your actual file name.
    */
    background-image: url("assets/site_banner.png");
    background-position: center left;
    background-repeat: no-repeat;
    background-size: cover;

    color: var(--text-light);
    padding: 1rem 2rem; /* Add more left padding for the text */
    text-align: center; /* Align text to the left */
    box-shadow: var(--shadow-md);
    position: relative;
}

header h1 {
    margin: 0;
    font-size: 2.2rem; /* Slightly smaller */
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4); /* Add shadow for readability */
}

header p {
    font-size: 1rem;
    margin-top: 0.25rem; /* Reduced margin */
    opacity: 0.9;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4); /* Add shadow for readability */
}

#mainNav {
    background-color: var(--accent-red); /* CHANGED: Permanent red background */
    padding: 0.5rem 0;
    box-shadow: var(--shadow-sm);
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 99;
    transition: background-color var(--transition-speed) ease;
}

#mainNav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem; /* Reduced gap */
}

#mainNav ul li a {
    text-decoration: none;
    color: var(--text-light); /* CHANGED: White text for readability */
    font-weight: bold;
    padding: 0.4rem 0.8rem; /* Reduced padding */
    border-radius: 20px;
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease;
}

#mainNav ul li a:hover,
#mainNav ul li a:focus {
    background-color: var(
        --accent-red-darker
    ); /* CHANGED: Darker red on hover */
    color: var(--text-light);
}

/* 4. Category Cards & Links
-------------------------------------------------------------- */
.category-section {
    padding: 1rem; /* Further reduced padding */
    border: 1px solid var(--border-light);
    border-radius: 12px;
    background-color: var(--card-bg-light);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background-color var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.category-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-section h2 {
    margin-top: 0;
    color: var(--primary-hover);
    font-size: 1.4rem;
    margin-bottom: 0.1rem; /* Further reduced margin */
    border-bottom: 1px solid var(--accent-red); /* CHANGED: Red divider line */
    padding-bottom: 0.4rem;
    transition:
        color var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.category-section > p {
    /* Direct child selector */
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 0.4rem; /* Further reduced margin */
    font-size: 0.8rem;
    transition: color var(--transition-speed) ease;
}

.link-list {
    list-style: none;
    padding: 0;
    margin: 0;
    flex-grow: 1;
    /* NEW: Scrollable properties */
    max-height: 350px; /* Adjust this value to show more/fewer items */
    overflow-y: auto;
    padding-right: 8px; /* Add space for the scrollbar */
}

/* NEW: Custom scrollbar styling */
.link-list::-webkit-scrollbar {
    width: 6px;
}

.link-list::-webkit-scrollbar-track {
    background: transparent;
}

.link-list::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb-light);
    border-radius: 6px;
}

.link-list li {
    margin-bottom: 0.25rem;
    border-radius: 8px;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: flex-start;
    padding: 0.4rem 0.6rem; /* Further reduced padding */
}

.link-list li:hover {
    background-color: var(--bg-light);
}

.link-list li a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.95rem;
    transition: color var(--transition-speed) ease;
    flex: 1;
}

.link-list li a:hover {
    text-decoration: underline;
}

.link-list li p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.15rem 0 0 0;
    font-weight: normal; /* Reset font weight */
    transition: color var(--transition-speed) ease;
}

.link-list li img.favicon {
    width: 16px;
    height: 16px;
    margin-right: 10px;
    border-radius: 4px;
    margin-top: 3px; /* Aligns favicon better with the first line of text */
}

/* 5. Dark Mode & Suggestion UI
-------------------------------------------------------------- */
.dark-mode-toggle-container {
    position: absolute;
    top: 0.75rem; /* Adjusted */
    right: 1rem;
    z-index: 100;
}

.dark-mode-button {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 0.4rem 0.8rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition:
        background-color var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.dark-mode-button:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

.dark-mode-button i {
    font-size: 1.1rem;
}

.dark-mode-button #moonIcon {
    display: none;
}
.dark-mode-button #sunIcon {
    display: inline-block;
}

.suggestion-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.suggestion-button {
    background-color: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 50px;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition:
        background-color var(--transition-speed) ease,
        transform 0.2s ease;
}

.suggestion-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
}

.suggestion-popup {
    background-color: var(--card-bg-light);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    width: 320px;
    max-width: 90vw;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    margin-top: 10px;
    display: none;
    flex-direction: column;
    overflow: hidden;
    transition: background-color var(--transition-speed) ease;
}

.suggestion-popup.open {
    display: flex;
}

.popup-header {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.popup-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.close-popup-button {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 5px;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.close-popup-button:hover {
    opacity: 1;
}

.popup-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.popup-body p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}
.popup-body .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}
.popup-body label {
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--text-dark);
}

.popup-body input[type="text"],
.popup-body input[type="url"],
.popup-body textarea {
    padding: 0.6rem;
    border: 1px solid var(--border-light);
    border-radius: 5px;
    font-size: 0.95rem;
    width: 100%;
    box-sizing: border-box;
}

.popup-body textarea {
    resize: vertical;
    min-height: 80px;
}

.popup-body input:focus,
.popup-body textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.submit-suggestion-button {
    background-color: var(--success-color);
    color: var(--text-light);
    border: none;
    border-radius: 5px;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 0.5rem;
    transition: background-color 0.2s ease;
}

.submit-suggestion-button:hover {
    background-color: #218838;
}
.form-message {
    text-align: center;
    font-size: 0.9rem;
    margin-top: 0.5rem !important;
}
.form-message.success {
    color: var(--success-color);
}
.form-message.error {
    color: var(--error-color);
}

/* 6. Dark Mode Overrides
-------------------------------------------------------------- */
body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark-mode);
}
body.dark-mode .dark-mode-button #moonIcon {
    display: inline-block;
}
body.dark-mode .dark-mode-button #sunIcon {
    display: none;
}
body.dark-mode header {
    /* If your dark mode needs a different image, change the URL here */
}
body.dark-mode #mainNav {
    background-color: var(
        --accent-red
    ); /* CHANGED: Keep nav red in dark mode */
}
body.dark-mode #mainNav ul li a {
    color: var(--text-light); /* CHANGED: Keep nav text white */
}
body.dark-mode #mainNav ul li a:hover,
body.dark-mode #mainNav ul li a:focus {
    background-color: var(
        --accent-red-darker
    ); /* CHANGED: Darker red on hover */
    color: var(--text-light);
}
body.dark-mode .category-section {
    background-color: var(--card-bg-dark);
    border-color: var(--border-dark);
}
body.dark-mode .category-section h2 {
    color: var(--primary-dark-mode);
    border-color: var(--accent-red); /* CHANGED: Keep divider red */
}
body.dark-mode .category-section > p,
body.dark-mode .link-list li p {
    color: #a0a0a0;
}
body.dark-mode .link-list li:hover {
    background-color: #2c2c2c;
}
body.dark-mode .link-list li a {
    color: #87ceeb; /* A nice light blue */
}
/* NEW: Dark mode scrollbar */
body.dark-mode .link-list::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb-dark);
}
body.dark-mode .suggestion-button {
    background-color: var(--primary-hover);
}
body.dark-mode .suggestion-popup {
    background-color: #252525;
    border-color: var(--border-dark);
}
body.dark-mode .popup-header {
    background-color: var(--primary-hover);
}
body.dark-mode .popup-body p {
    color: #a0a0a0;
}
body.dark-mode .popup-body label {
    color: var(--text-dark-mode);
}
body.dark-mode .popup-body input,
body.dark-mode .popup-body textarea {
    background-color: #333;
    border-color: #555;
    color: var(--text-dark-mode);
}
body.dark-mode .popup-body input::placeholder,
body.dark-mode .popup-body textarea::placeholder {
    color: #888;
}
body.dark-mode .popup-body input:focus,
body.dark-mode .popup-body textarea:focus {
    border-color: var(--primary-dark-mode);
    box-shadow: 0 0 0 3px rgba(136, 204, 255, 0.25);
}

/* 7. Footer
-------------------------------------------------------------- */
footer {
    text-align: center;
    padding: 1.5rem 0;
    background-color: #222;
    color: #aaa;
    font-size: 0.9rem;
    margin-top: 1.5rem;
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease;
}
body.dark-mode footer {
    background-color: #111;
}

/* 8. Responsive Design
-------------------------------------------------------------- */
@media (max-width: 768px) {
    header {
        text-align: center;
        background-position: center center; /* Center image on mobile */
        padding: 1rem; /* Reset padding for mobile */
    }

    header h1 {
        font-size: 2rem;
    }
    header p {
        font-size: 1rem;
    }
    main#app {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 0.5rem;
        margin-top: 1rem;
    }

    #mainNav {
        position: sticky; /* Make nav sticky on mobile */
    }

    #mainNav ul {
        flex-wrap: nowrap; /* This is the key change */
        flex-direction: row;
        overflow-x: auto;
        white-space: nowrap;
        justify-content: flex-start;
        gap: 0.5rem;
        padding: 0 1rem;
        /* Hide scrollbar for a cleaner look */
        -ms-overflow-style: none; /* IE and Edge */
        scrollbar-width: none; /* Firefox */
    }

    #mainNav ul::-webkit-scrollbar {
        display: none; /* For Chrome, Safari, and Opera */
    }

    #mainNav ul li a {
        display: inline-block;
        padding: 0.5rem 1rem;
    }

    /* Visual cue for horizontal scrolling */
    #mainNav::after {
        content: "";
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 40px;
        /* CHANGED: Gradient fades from red */
        background: linear-gradient(to left, var(--accent-red), transparent);
        pointer-events: none; /* So you can click through it */
        transition: background var(--transition-speed) ease;
    }

    body.dark-mode #mainNav::after {
        /* This override is no longer needed as the nav bar is always red */
    }

    /* Mobile Dark Mode Button: Hide text, make it a circle */
    .dark-mode-button #toggleText {
        display: none;
    }
    .dark-mode-button {
        padding: 0.6rem;
        width: 40px;
        height: 40px;
    }

    .suggestion-container {
        bottom: 10px;
        right: 10px;
    }
    .suggestion-button {
        padding: 0.7rem 1rem; /* Reduced padding */
        font-size: 0.8rem; /* Reduced font size */
    }
    .suggestion-popup {
        width: calc(100vw - 20px);
    }
}

/* 9. Language Switcher Styling
-------------------------------------------------------------- */
.language-switcher-container {
    position: absolute;
    top: 0.75rem;
    left: 1rem; /* Positioned on the left */
    z-index: 100;
}

.language-link {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 0.4rem 0.8rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-flex; /* Use flex to align text and icons if any */
    align-items: center;
    gap: 0.5rem;
    transition:
        background-color var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.language-link:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

/* Dark mode adjustments for language switcher */
body.dark-mode .language-link {
    background-color: rgba(0, 0, 0, 0.3); /* Slightly darker in dark mode */
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-dark-mode);
}

@media (max-width: 768px) {
    .language-switcher-container {
        left: 1rem;
        right: auto; /* Ensure it stays on the left for mobile */
        top: 4.5rem; /* Adjust position to not overlap header text */
    }
}