:root {
    --primary-color: #3498db;
    --background-color: #f4f7f6;
    --card-bg-color: #ffffff;
    --text-color: #333;
    --light-text-color: #777;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 40px 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
}

main {
    padding: 40px 0;
}

#app-list {
    display: grid;
    gap: 30px;
}

.app-card {
    background-color: var(--card-bg-color);
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow-color);
    display: flex;
    padding: 25px;
    gap: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    align-items: center;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.app-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    object-fit: cover;
    flex-shrink: 0;
}

.app-info {
    display: flex;
    flex-direction: column;
}

.app-title {
    margin: 0 0 10px 0;
    font-size: 1.8em;
}

.app-description {
    margin: 0 0 20px 0;
    color: var(--light-text-color);
}

.download-button {
    background-color: #000000;
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    transition: background-color 0.3s ease;
    align-self: flex-start;
}

.download-button:hover {
    background-color: #333333;
}

.download-button i {
    margin-right: 8px;
}

footer {
    text-align: center;
    padding: 20px 0;
    color: var(--light-text-color);
    font-size: 0.9em;
}

@media (max-width: 600px) {
    .app-card {
        flex-direction: column;
        text-align: center;
    }
    .download-button {
        align-self: center;
    }
}