/* 全局樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Arial", "Microsoft YaHei", sans-serif;
}

:root {
    --primary-blue: #d7ebfa; /* 圖片淺藍背景 */
    --dark-blue: #a2d2ff;   /* 導航/按鈕藍色 */
    --deep-blue: #8ec5fc;   /* 頁腳深藍 */
    --text-dark: #2d3748;
    --white: #ffffff;
    --green-tag: #81c784;
    --blue-tag: #64b5f6;
    --red-tag: #ef5350;
    --purple-tag: #ba68c8;
}

body {
    background-color: var(--primary-blue);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 導航欄樣式 */
.navbar {
    background-color: var(--white);
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--dark-blue);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-icon {
    display: flex;
    gap: 2px;
}

.logo-icon span {
    display: block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.logo-icon .color1 { background-color: #4285f4; }
.logo-icon .color2 { background-color: #ea4335; }
.logo-icon .color3 { background-color: #fbbc05; }
.logo-icon .color4 { background-color: #4285f4; }
.logo-icon .color5 { background-color: #34a853; }

.nav-links ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
}

.nav-links a.active {
    color: var(--blue-tag);
    border-bottom: 2px solid var(--blue-tag);
}

/* 活動頂部橫幅 */
.event-banner {
    padding: 1rem 0;
}

.banner-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
}

.banner-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
}

/* 主要活動區域 */
.main-event {
    padding: 2rem 0;
}

.event-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.event-left img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.event-meta {
    font-size: 0.9rem;
}

.event-meta p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.event-tags {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

.event-tags .tag {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.tag.green { background-color: var(--green-tag); }
.tag.blue { background-color: var(--blue-tag); }
.tag.red { background-color: var(--red-tag); }
.tag.purple { background-color: var(--purple-tag); }

.event-notes {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--primary-blue);
    border-radius: 8px;
}

.event-notes h4 {
    margin-bottom: 0.5rem;
}

.event-notes ol {
    padding-left: 1.5rem;
    font-size: 0.85rem;
    line-height: 1.5;
}

.event-right h2 {
    color: var(--blue-tag);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.event-desc h3 {
    margin: 1rem 0 0.5rem;
    color: var(--text-dark);
}

.event-desc p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.register-btn {
    background-color: var(--dark-blue);
    color: var(--text-dark);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: background-color 0.3s;
}

.register-btn:hover {
    background-color: var(--blue-tag);
}

/* 次要活動區域 */
.sub-events {
    padding: 2rem 0;
}

.sub-events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.sub-event-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    padding-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.sub-event-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.sub-event-card h3 {
    padding: 0 1rem;
    margin: 1rem 0 0.5rem;
    font-size: 1.1rem;
}

.sub-event-card p {
    padding: 0 1rem;
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sub-event-card .event-tags {
    padding: 0 1rem;
    margin-top: 0.5rem;
}

/* 頁腳樣式 */
.footer {
    background-color: var(--deep-blue);
    padding: 2rem 0;
    color: var(--text-dark);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    font-size: 1.2rem;
}

.social-links a {
    color: var(--text-dark);
}

/* 報名彈窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
}

.close-btn {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--blue-tag);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.submit-btn {
    background-color: var(--dark-blue);
    color: var(--text-dark);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    margin-top: 1rem;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .nav-links ul {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .banner-grid {
        grid-template-columns: 1fr;
    }

    .event-card {
        grid-template-columns: 1fr;
    }

    .footer .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .footer-links ul {
        flex-direction: column;
        gap: 0.5rem;
    }
}