:root {
    --primary-color: #55CECB;
    --secondary-color: #FF9388;
    --background-color: #f5f5f7;
    --card-background: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

header p {
    color: var(--text-secondary);
}

.card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

h2 {
    margin-top: 0;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 12px;
    margin-bottom: 20px;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.controls, .subscriber-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

input[type="text"] {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.btn.secondary {
    background-color: var(--secondary-color);
    color: black;
}

.event-list {
    max-height: 400px;
    overflow-y: auto;
}

.event-item {
    padding: 16px;
    border-bottom: 1px solid #f0f0f0;
}

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

.event-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 4px;
    display: block;
    text-decoration: none;
    color: var(--text-color);
}

.event-title:hover {
    color: var(--primary-color);
}

.event-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    gap: 12px;
}

.subscriber-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.subscriber-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 6px;
    margin-bottom: 8px;
}

.delete-btn {
    background: #ff5252;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 0.8rem;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}