/* style.css */
:root {
    --primary-color: #1976D2; /* A trustworthy blue */
    --secondary-color: #4CAF50; /* A positive green for reset */
    --background-color: #F4F6F8; /* A very light grey */
    --surface-color: #FFFFFF; /* White for cards */
    --on-surface-color: #212121; /* Dark grey for text */
    --on-primary-color: #FFFFFF;
    --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(--on-surface-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: none;
    margin-bottom: 2rem;
    text-align: center;
}

header, main, footer {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

main {
    flex: 1;
}

footer {
    margin-top: 2rem;
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: #757575;
}

.ad-placeholder {
    width: 100%;
    min-height: 50px;
    background-color: var(--surface-color);
    border: 1px dashed #BDBDBD;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #BDBDBD;
    border-radius: 8px;
}