:root {
    --bg: #ffffff;
    --text: #222;
    --card: #f3f3f3;
    --accent: #4a8cff;
    --github: #000000;
}

body.dark {
    --bg: #0d0d0d;
    --text: #e4e4e4;
    --card: #1a1a1a;
    --accent: #70a6ff;
}

body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background .3s, color .3s;
}

header {
    padding: 60px 20px;
    text-align: center;
    animation: fadeIn 1s ease;
}

header h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

header p {
    font-size: 20px;
    opacity: 0.8;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 40px;
    animation: slideUp 1s ease;
}

.card {
    background: var(--card);
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform .3s, box-shadow .3s;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.screenshot {
    margin-top: 50px;
}

.screenshot h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 32px;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.screenshot-grid img {
    width: 100%;
    border-radius: 12px;
    cursor: pointer;
    transition: transform .3s;
}

.screenshot-grid img:hover {
    transform: scale(1.05);
}

/* Lightbox */
#lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

#lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 10px;
}

/* Dark Mode Button */
.dark-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--card);
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: background .3s, color .3s;
}

.download-btn {
    display: inline-block;
    text-decoration: none;
    background: var(--accent);
    color: #fff;
    padding: 14px 25px;
    font-size: 18px;
    border-radius: 10px;
    margin-top: 20px;
    transition: background .3s;
}

.download-btn:hover {
    background: #2b6aff;
}

.github-btn {
    display: inline-block;
    text-decoration: none;
    background-color: var(--github);
    color: #fff;
    padding: 14px 25px;
    font-size: 18px;
    border-radius: 10px;
    margin-top: 20px;
    transition: background .3s;
}

.download-btn:hover {
    background: #2b6aff;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}