/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap');

:root {
    /* Light Mode Default */
    --bg-color: #f5f5f5;
    --text-color: #000000; /* Pure black for contrast */
    --card-bg: #ffffff;
    --card-border: #e0e0e0;
    --nav-bg: #ffffff;
    --bg-image: url('../img/brick_background.png');
    
    --accent-blue: #0078d7;
    --accent-red: #d13438;
    --accent-yellow: #ffb900;
    
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #ffffff;
    --card-bg: #000000; /* Pure black bg for text containers */
    --card-border: #333333;
    --nav-bg: #121212;
    --bg-image: url('../img/brick_background_dark.png');
    --shadow: 0 4px 6px rgba(0,0,0,0.5);
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    background-image: var(--bg-image);
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: var(--nav-bg);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--accent-red); /* Added accent for structure */
    transition: background-color 0.3s, border-color 0.3s;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 15px; /* Space between icon and logo text/image */
}

/* Header Icons */
.logo-icon {
    height: 32px;
    width: 32px;
}

.logo-brand {
    height: 50px; /* Adjusted size */
    width: auto;
    object-fit: contain;
}

nav {
    display: flex;
    align-items: center;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 700; /* Bolder */
    font-size: 0.95rem;
    text-transform: uppercase;
    transition: color 0.2s;
    /* Readable on nav bar */
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

nav a:hover, nav a.active {
    background: var(--accent-yellow);
    color: #000;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--card-bg);
    border: 2px solid var(--text-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    margin-left: 2rem;
    color: var(--text-color);
    transition: all 0.2s;
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem 5%;
}

.hero-logo-img {
    max-width: 600px;
    width: 90%;
    margin-bottom: 2rem;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.5)); 
}

/* High Contrast Text Box for Hero */
.hero-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid var(--card-border);
    max-width: 700px;
    box-shadow: var(--shadow);
}

.hero p {
    font-size: 1.3rem;
    color: var(--text-color);
    margin: 0 0 2rem 0;
    font-weight: 600;
}

.btn {
    padding: 1rem 2.5rem;
    background: var(--accent-blue);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background 0.2s, transform 0.2s;
    border: 2px solid var(--accent-blue);
    cursor: pointer;
    display: inline-block;
}

.btn:hover {
    background: #005a9e;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--text-color);
    margin-left: 1rem;
}

.btn-secondary:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

/* Cards (Solid Background for readability) */
.card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    color: var(--text-color);
}

/* Features */
.features {
    padding: 5rem 10%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.features h2 {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    /* Heading needs background or stroke? Let's give it a pill background */
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-radius: 50px;
    display: inline-block;
    justify-self: center;
    border: 2px solid var(--card-border);
    color: var(--text-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-blue);
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 5rem auto;
    padding: 0 2rem;
}

.timeline h2 {
    /* Assuming section title logic similar to features */
    text-align: center;
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-radius: 50px;
    display: inline-block;
    border: 2px solid var(--card-border);
    color: var(--text-color);
    margin: 0 auto 3rem auto;
    display: block;
    width: fit-content;
}

.timeline-item {
    margin-bottom: 2rem;
    border-left: 5px solid var(--accent-blue);
    background: var(--card-bg); /* Ensure card bg */
}

.timeline-date {
    font-weight: 800;
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

/* Gallery */
.gallery {
    padding: 5rem 5%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    /* Safety clear to ensure it doesn't overlap with floats/previous elements */
    clear: both;
}

.gallery-item {
    border-radius: 8px;
    overflow: hidden;
    /* Aspect Ratio with padding-bottom hack fallback if needed, but standard aspect-ratio is widely supported now. */
    aspect-ratio: 16/9; 
    border: 2px solid var(--card-border);
    background: #000;
    position: relative;
    box-shadow: var(--shadow);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block; /* Removes bottom spacing */
    transition: transform 0.5s;
    position: absolute; /* Ensures it fills the relative container */
    top: 0;
    left: 0;
}

/* Download Versions */
.download-versions {
    max-width: 800px;
    margin: 5rem auto;
    padding: 0 2rem;
}

.version-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.version-info h3 { margin-top: 0; }

.version-meta { font-size: 0.9rem; font-weight: 600; color: #666; }
body.dark-mode .version-meta { color: #aaa; }

/* Footer */
footer {
    padding: 3rem 5%;
    text-align: center;
    color: var(--text-color);
    border-top: 2px solid var(--card-border);
    margin-top: 5rem;
    background: var(--nav-bg);
    font-weight: 600;
}

@media (max-width: 768px) {
    .version-card { flex-direction: column; text-align: center; gap: 1rem; }
    .hero h1 { font-size: 2.5rem; }
    header { flex-direction: column; gap: 1rem; }
    .logo { width: 100%; justify-content: center; }
    nav { flex-wrap: wrap; justify-content: center; width: 100%; }
    nav a { margin: 0.5rem; }
}