:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --header-bg: #333333;
    --header-text: #ffffff;
    --card-border: #cccccc;
    --link-color: #ffffff;
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --header-bg: #1e1e1e;
    --header-text: #e0e0e0;
    --card-border: #333333;
    --link-color: #bb86fc; /* Optional: A nice accent for dark mode */
}

body {
    font-family: sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    position: sticky;
    top: 0;
}

.logo {
    font-size: 1.5rem;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav li {
    margin-left: 1rem;
}

nav a {
    color: var(--header-text);
    text-decoration: none;
}

main {
    padding: 1rem;
}

section {
    margin-bottom: 2rem;
}

.card-container {
    display: flex;
    gap: 1rem;
}

.card {
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 1rem;
    flex: 1;
}

.card img {
    max-width: 100%;
    border-radius: 4px;
}

.schedule-container {
    background-color: var(--card-border);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.schedule-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

body.dark-mode .schedule-item {
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.schedule-item:last-child {
    border-bottom: none;
}

.event-name {
    font-weight: bold;
    color: #4CAF50;
}

.event-date {
    font-size: 0.9rem;
    opacity: 0.8;
}

footer {
    background-color: var(--header-bg);
    color: var(--header-text);
    text-align: center;
    padding: 1rem;
}

.theme-toggle {
    margin-left: 1rem;
    cursor: pointer;
    background: none;
    border: 1px solid var(--header-text);
    color: var(--header-text);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}