/* --- CSS VARIABLES FOR EASY CUSTOMIZATION --- */
:root {
    --bg-color: #111015;
    --card-bg-color: rgba(38, 38, 44, 0.5); /* Semi-transparent for glass effect */
    --primary-text-color: #e5e5e5;
    --secondary-text-color: #a0a0a0;
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-color: #8A2BE2; /* A vibrant violet */
    --accent-hover-color: #9932CC;
    --font-family: 'Inter', sans-serif;
}

/* --- BASIC RESET & SETUP --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    line-height: 1.6;
    background-image: radial-gradient(circle at top left, rgba(138, 43, 226, 0.1), transparent 30%),
                      radial-gradient(circle at bottom right, rgba(138, 43, 226, 0.1), transparent 40%);
    background-attachment: fixed;
}

/* --- LAYOUT & TYPOGRAPHY --- */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #c5a3ff, #8A2BE2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--secondary-text-color);
    margin-top: 0.5rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent-color);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover {
    color: var(--accent-hover-color);
}

/* --- FILE CATEGORY SECTION --- */
.file-category {
    margin-bottom: 3rem;
}

/* --- FILE CARD STYLING (THE CORE) --- */
.file-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    
    /* The Glassmorphism Effect */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.file-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.file-info i { /* Styling the Feather icons */
    width: 24px;
    height: 24px;
    color: var(--secondary-text-color);
}

.file-details h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-text-color);
}

.file-details p {
    font-size: 0.9rem;
    color: var(--secondary-text-color);
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.file-size {
    font-size: 0.9rem;
    color: var(--secondary-text-color);
    background-color: rgba(255, 255, 255, 0.05);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
}

.download-btn {
    background-color: var(--accent-color);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background-color 0.2s ease-in-out;
    white-space: nowrap;
}

.download-btn:hover {
    background-color: var(--accent-hover-color);
    color: #fff;
}

/* --- FOOTER --- */
footer {
    text-align: center;
    margin-top: 4rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--secondary-text-color);
}

/* --- RESPONSIVE DESIGN FOR MOBILE --- */
@media (max-width: 600px) {
    .container {
        padding: 1.5rem 1rem;
    }
    .file-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .file-meta {
        width: 100%;
        justify-content: space-between;
    }
    .site-title {
        font-size: 2rem;
    }
}

/* --- 404 NOT FOUND PAGE STYLES --- */

/* This centers the card vertically on the page */
.not-found-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90vh;
}

/* This is the main "glass" card for the 404 message */
.not-found-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 3rem;

    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* The big warning icon */
.not-found-card > i {
    width: 56px;
    height: 56px;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

/* The giant "404" number text */
.not-found-card h1 {
    font-size: 7rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #c5a3ff, #8A2BE2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* The "Page Not Found" sub-heading */
.not-found-card h2 {
    font-size: 1.75rem;
    color: var(--primary-text-color);
    margin-bottom: 1rem;
    border: none; /* Override default h2 border */
    padding: 0;
}

/* The helpful paragraph text */
.not-found-card p {
    color: var(--secondary-text-color);
    max-width: 400px;
    margin-bottom: 2rem;
}

/* The "Go Home" button */
.go-home-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--accent-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: background-color 0.2s ease-in-out;
}
.go-home-btn:hover {
    background-color: var(--accent-hover-color);
    color: #fff;
}