:root {
    --header-bg: #0B3A24;
    --header-text: #E2F0D9;
    --page-bg: #F5F2EB;
    --text-title: #8C6239;
    --text-main: #2D2926;
    --text-muted: #706862;
    --accent-color: #3E3530;
    --card-bg: #FFFFFF;
    --card-shadow: rgba(11, 58, 36, 0.06);
    --btn-secondary-bg: #4B5E55;
    --code-block-bg: #EAEFEF;
    --toast-bg: #2D2926;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'PingFang TC', 'Microsoft JhengHei', sans-serif;
}

body {
    background-color: var(--page-bg);
    color: var(--text-main);
    line-height: 1.6;
}

.toast-notification {
    position: fixed;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--toast-bg);
    color: #ffffff;
    padding: 0.75rem 2rem;
    border-radius: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-size: 0.95rem;
    font-weight: 500;
    z-index: 2000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: top 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
    opacity: 0;
    pointer-events: none;
}

.toast-notification.show {
    top: 100px;
    opacity: 1;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px var(--card-shadow);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

header h1 {
    font-size: 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem; 
}

.flag-icon {
    height: 1.3rem;
    width: auto;
    border-radius: 2px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    display: block;
}

.lang-switch a {
    color: var(--header-text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--header-text);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.lang-switch a:hover {
    background-color: var(--header-text);
    color: var(--header-bg);
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px var(--card-shadow);
}

h2 {
    color: var(--text-title);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--page-bg);
    padding-bottom: 0.5rem;
}

.intro-p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.hashtag-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px dashed var(--page-bg);
}

.hashtag {
    background-color: var(--hashtag-bg);
    color: var(--accent-color);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.hashtag:hover {
    background-color: var(--accent-color);
    color: #ffffff;
}

.url-display {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-family: monospace;
    word-break: break-all;
}

.btn-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    min-width: 230px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--accent-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    height: 48px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: opacity 0.3s ease;
    font-size: 1rem !important;
    font-family: inherit; 
}

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

.btn:hover {
    opacity: 0.9;
}

#calendar {
    background: var(--card-bg);
    padding: 1em;
    border-radius: 6px;
    font-size: 0.8em;
    min-height: 400px;
}

.fc .fc-toolbar-title {
    font-size: 1.4em;
    color: inherit;
    border: 0;
    padding: 0;
}

.fc .fc-toolbar-ltr .fc-button-group {
    height: 2.5em;
}

.fc .fc-button-group > .fc-button {
    width: 3.5em;
}

.fc .fc-daygrid-day-frame {
    min-height: 36px;
}

.fc-h-event .fc-event-title-container {
    text-align: center;
}

.fc .fc-daygrid-more-link {
    background-color: var(--fc-event-bg-color);
    color: var(--fc-event-text-color);
}

.tabs {
    display: flex;
    border-bottom: 2px solid var(--page-bg);
    margin-bottom: 1rem;
}

.tab-btn {
    min-width: 8rem;
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    font-size: 1.1rem;
    cursor: pointer;
    color: var(--text-muted);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    font-weight: bold;
}

.tab-content {
    display: none;
    padding: 1rem 0;
}

.tab-content.active {
    display: block;
}

ol {
    padding-left: 1.5rem;
    color: var(--text-main);
}

li {
    margin-bottom: 0.5rem;
}

.code-block {
    background: var(--code-block-bg);
    color: var(--text-main);
    padding: 0.75rem;
    border-left: 4px solid var(--accent-color);
    font-family: monospace;
    margin: 0.5rem 0;
    word-break: break-all;
    border-radius: 0 4px 4px 0;
}

.faq-item {
    margin-bottom: 1.25rem;
}

.faq-item h3 {
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}

.faq-item p {
    color: var(--text-muted);
}

.faq-item a {
    color: var(--text-title);
    text-decoration: underline;
}

.disclaimer-box {
    border: 1px dashed var(--accent-color);
    background-color: var(--page-bg);
    padding: 1.25rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.disclaimer-box h4 {
    color: var(--text-main);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    header {
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }
    
    header h1 {
        font-size: 1.2rem;
    }
}