/* =============================================================
   Design System
   =============================================================
   * Colors
   * Typography
   * Spacing
   =============================================================
*/
:root {
    /* Color palette – professional, neutral, with accent */
    --color-primary: #0067A0;     /* 深藍 */
    --color-secondary: #F2994A;   /* 橘色 */
    --color-accent: #E5E5E5;      /* 淺灰 */
    --color-bg: #FFFFFF;
    --color-surface: #F7F7F7;
    --color-text: #333333;
    --color-muted: #666666;
    --color-dark: #111111;

    /* Typography */
    --font-body: 'Roboto', system-ui, sans-serif;
    --font-heading: 'Inter', system-ui, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Shadows */
    --shadow-xs: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-sm: 0 3px 6px rgba(0,0,0,0.16);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.19);

    /* Breakpoints */
    --breakpoint-sm: 480px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
}

[data-theme="dark"] {
    /* Dark mode color palette */
    --color-primary: #4A90E2;     /* 淺藍 */
    --color-secondary: #FF9F4A;   /* 暖橘 */
    --color-accent: #2D2D2D;      /* 深灰 */
    --color-bg: #1A1A1A;
    --color-surface: #252525;
    --color-text: #E0E0E0;
    --color-muted: #A0A0A0;
    --color-dark: #0D0D0D;

    /* Lighter shadows for dark mode */
    --shadow-xs: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-sm: 0 3px 6px rgba(0,0,0,0.4);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.5);
}

/* =============================================================
   Reset & Base
   =============================================================
*/
*,
*::before,
*::after {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-surface);
}

/* =============================================================
   Skip Link
   =============================================================
*/
.skip-link {
    position: absolute;
    top: -4rem;
    left: 1rem;
    background: var(--color-primary);
    color: #fff;
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: top 0.3s;
}
.skip-link:focus {
    top: 1rem;
}

/* =============================================================
   Header / Hero
   =============================================================
*/
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #8e44ad 50%, var(--color-secondary) 100%);
    color: #fff;
    padding: var(--spacing-xl) 1rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}
.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}
.hero .subtitle,
.hero .participants {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}
.hero .participants {
    font-style: italic;
}

/* =============================================================
   Navigation
   =============================================================
*/
.main-nav {
    background: var(--color-bg);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-xs);
    position: sticky;
    top: 0;
    z-index: 100;
}
.main-nav button#nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}
.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}
.main-nav li {
    margin: 0 var(--spacing-sm);
}
.main-nav a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin: 0 4px;
    text-decoration: none;
    color: var(--color-text);
    border-radius: 4px;
    transition: background 0.2s;
    font-size: 0.9rem;
}
.main-nav a:hover,
.main-nav a:focus-visible {
    background: var(--color-surface);
    color: var(--color-primary);
}
.main-nav a.active {
    background: #f8f9fa;
    color: var(--color-primary);
}
/* 桌面版暗色模式按鈕 */
.nav-theme-toggle {
    background: var(--color-secondary);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 1rem;
    cursor: pointer;
    margin-left: var(--spacing-sm);
    transition: background 0.2s, transform 0.2s;
}
.nav-theme-toggle:hover {
    background: #f39c12;
    transform: translateY(-1px);
}
.nav-theme-toggle:active {
    transform: translateY(0);
}
.nav-theme-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (max-width: var(--breakpoint-md)) {
    .main-nav button#nav-toggle {
        display: block;
    }
    .main-nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    .main-nav ul.open {
        display: flex;
    }
    .main-nav li {
        margin: var(--spacing-xs) 0;
        text-align: center;
    }
}

/* =============================================================
   Main content
   =============================================================
*/
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}
.section {
    background: var(--color-bg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-xs);
}
.section h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-secondary);
}

/* 餐飲 section 標題特別樣式 */
#food h2 {
    color: var(--color-secondary);
    border-bottom-color: var(--color-secondary);
}
.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}
.timeline-item {
    display: flex;
    gap: var(--spacing-sm);
}
.time {
    min-width: 70px;
    background: var(--color-surface);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
}
.content {
    flex: 1;
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: background 0.2s, box-shadow 0.2s;
}
.content:hover {
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.content h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}
.content p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    color: var(--color-muted);
}
.content .budget {
    font-size: 0.85rem;
    color: var(--color-primary);
    margin-top: var(--spacing-xs);
}

/* =============================================================
   Accommodation + Map
   =============================================================
*/
.accommodation-card {
    display: flex;
    gap: var(--spacing-lg);
}
.accommodation-info {
    flex: 1;
}
.accommodation-info h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}
.accommodation-info p {
    line-height: 1.8;
}
.map-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}
.map-wrapper iframe {
    width: 100%;
    height: 320px;
    border: none;
    border-radius: 8px;
}
.map-instructions {
    font-size: 0.8rem;
    color: var(--color-muted);
    text-align: center;
    margin-top: var(--spacing-sm);
}
.map-search-box {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    justify-content: center;
}
.map-search-box input {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--color-muted);
    border-radius: 8px;
    font-size: 0.9rem;
    width: 280px;
}
.map-search-box button {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}
.map-result {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border-radius: 8px;
    font-size: 0.85rem;
    display: none;
}
.map-result.active {
    display: block;
}

/* =============================================================
   Food Grids (Restaurant & Bar)
   =============================================================
*/
.food-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* 餐廳卡片樣式 */
.restaurant-card {
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

/* 酒吧卡片樣式 */
.bar-card {
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

/* 通用卡片 hover 效果 */
.restaurant-card:hover,
.bar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}
.card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}
.restaurant-card h3,
.bar-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}
.restaurant-card .description,
.bar-card .description {
    font-size: 0.9rem;
    color: var(--color-muted);
    margin-bottom: var(--spacing-xs);
}
.restaurant-card .address,
.bar-card .budget {
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}
.link-button,
.link-button-bar {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-secondary);
    color: #fff;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background 0.2s;
}
.link-button:hover,
.link-button-bar:hover {
    background: #f39c12;
}

/* =============================================================
   Budget Table
   =============================================================
*/
.budget-table {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th,
td {
    padding: var(--spacing-md) var(--spacing-sm);
    text-align: left;
}
th {
    background: var(--color-surface);
    font-weight: 600;
}
tr.total {
    background: var(--color-primary);
    color: #fff;
}
tr.total td {
    border-bottom-color: var(--color-primary);
}

/* =============================================================
   Info Grid
   =============================================================
*/
.info-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.info-card {
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: 12px;
}
.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}
.info-card ul {
    list-style: none;
    padding: 0;
}
.info-card li {
    font-size: 0.9rem;
    color: var(--color-muted);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-muted);
}
.info-card li:last-child {
    border-bottom: none;
}

/* =============================================================
   Footer
   =============================================================
*/
footer {
    background: var(--color-dark);
    color: #fff;
    text-align: center;
    padding: var(--spacing-lg) 1rem;
}
footer p {
    margin: 0.25rem 0;
}
.disclaimer {
    margin-top: var(--spacing-lg);
    font-size: 0.8rem;
    color: var(--color-muted);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-muted);
}

/* =============================================================
   Focus Styles
   =============================================================
*/
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* =============================================================
   Responsive
   =============================================================
*/
@media (max-width: var(--breakpoint-md)) {
    .hero h1 {
        font-size: 1.8rem;
    }
    .hero .subtitle,
    .hero .participants {
        font-size: 1rem;
    }
    .hero {
        padding: var(--spacing-lg) 1rem;
    }
    .main-nav ul {
        flex-direction: column;
    }
    .main-nav li {
        margin: var(--spacing-xs) 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    /* 手機版選單：按鈕在開關時顯示在最後 */
    .main-nav li:last-child {
        margin-top: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    /* 暗色模式按鈕樣式 */
    .nav-theme-toggle {
        background: var(--color-secondary);
        color: #fff;
        border: none;
        border-radius: 6px;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 1.1rem;
        cursor: pointer;
        margin-left: var(--spacing-sm);
        transition: background 0.2s, transform 0.2s;
        text-align: center;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .nav-theme-toggle:hover {
        background: #f39c12;
        transform: translateY(-1px);
    }
    .nav-theme-toggle:active {
        transform: translateY(0);
    }
    main {
        display: flex;
        flex-direction: column;
    }
    section {
        display: flex;
        flex-direction: column;
    }
    .timeline {
        display: flex;
        flex-direction: column;
    }
    .accommodation-card {
        display: flex;
        flex-direction: column;
    }
}
@media (max-width: var(--breakpoint-sm)) {
    .hero h1 {
        font-size: 1.5rem;
    }
    .restaurant-grid,
    .bar-grid {
        grid-template-columns: 1fr;
    }
    .map-wrapper iframe {
        height: 280px;
    }
}