/* ==========================================
   主題變數系統
   - 預設明亮模式 (奶白 + 楓橘 + 草綠 + 天藍)
   - 暗色模式 [data-theme="dark"]：深褐底 + 暖橘輔色
   ========================================== */

:root,
:root[data-theme="light"] {
    --primary-color: #FF9E2C;
    --secondary-color: #96C839;
    --accent-color: #4CC4E7;
    --danger-color: #E74C3C;
    --background-light: #FFFDF2;
    --text-dark: #5D4037;
    --text-light: #FFFDF2;
    --border-color: #5D4037;
    --shadow-color: rgba(93, 64, 55, 0.3);

    --card-bg: #FFFFFF;
    --card-bg-soft: #FFF9E6;
    --card-bg-warm: #FFFDF2;
    --text-primary: #5D4037;
    --text-secondary: #8D6E63;
    --text-muted: #A1887F;
    --shadow-strong: rgba(0, 0, 0, 0.15);
    --shadow-light: rgba(0, 0, 0, 0.08);
    --overlay-bg: rgba(255, 255, 255, 0.9);
    --input-bg: #FFF9E6;

    --texture-1: rgba(255, 158, 44, 0.03);
    --texture-2: rgba(150, 200, 57, 0.03);
}

:root[data-theme="dark"] {
    --primary-color: #FFB155;
    --secondary-color: #B8DA5F;
    --accent-color: #6FD5F0;
    --danger-color: #FF6B6B;
    --background-light: #1A1410;
    --text-dark: #F5E6D3;
    --text-light: #FFFDF2;
    --border-color: #6D4C41;
    --shadow-color: rgba(0, 0, 0, 0.6);

    --card-bg: #2A2118;
    --card-bg-soft: #332720;
    --card-bg-warm: #3E2A20;
    --text-primary: #F5E6D3;
    --text-secondary: #D7C4A8;
    --text-muted: #C4A574;
    --shadow-strong: rgba(0, 0, 0, 0.5);
    --shadow-light: rgba(0, 0, 0, 0.3);
    --overlay-bg: rgba(42, 33, 24, 0.95);
    --input-bg: #1F1812;

    --texture-1: rgba(255, 177, 85, 0.04);
    --texture-2: rgba(184, 218, 95, 0.03);
}

/* 主題過渡 */
html {
    transition: background-color 0.3s ease, color 0.3s ease;
}

body, .navbar-custom, .stat-card, .group-category, .search-section,
.announcement-card, .footer, .group-item, .portal-card,
.bulletin-nav, .announcement-list, .announcement-item, .no-results {
    transition: background-color 0.3s ease, color 0.3s ease,
                border-color 0.3s ease, box-shadow 0.3s ease;
}

/* 自訂游標 */
* {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="%23FFD700" stroke="%235D4037" stroke-width="1.5" d="M8 2a2 2 0 0 1 2 2v4h2V4a2 2 0 1 1 4 0v4h1a2 2 0 1 1 0 4v6a4 4 0 0 1-8 0v-6H8V6a2 2 0 0 1 0-4z"/></svg>'), auto;
}

a, button {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="%23FFD700" stroke="%235D4037" stroke-width="2" d="M8 2a2 2 0 0 1 2 2v4h2V4a2 2 0 1 1 4 0v4h1a2 2 0 1 1 0 4v6a4 4 0 0 1-8 0v-6H8V6a2 2 0 0 1 0-4z"/></svg>'), pointer !important;
}

/* General Styles */
body {
    font-family: 'Microsoft JhengHei', 'Noto Sans TC', sans-serif;
    background-color: var(--background-light);
    color: var(--text-primary);
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent 50px, var(--texture-1) 50px, var(--texture-1) 51px),
        repeating-linear-gradient(0deg, transparent, transparent 50px, var(--texture-2) 50px, var(--texture-2) 51px);
}

/* SEO 視覺隱藏（保留於 DOM 給搜尋引擎） */
.visually-hidden-seo {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================
   Navbar
   ========================================== */
.navbar-custom {
    background: var(--card-bg);
    padding: 1rem 0;
    box-shadow: 0 4px 0 var(--border-color);
    border-bottom: 3px solid var(--border-color);
    position: relative;
}

.navbar-custom::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 8px;
    background: repeating-linear-gradient(
        90deg,
        var(--primary-color) 0px,
        var(--primary-color) 15px,
        var(--secondary-color) 15px,
        var(--secondary-color) 30px,
        var(--accent-color) 30px,
        var(--accent-color) 45px
    );
}

.navbar-custom .nav-link {
    color: var(--text-primary) !important;
    font-weight: 700;
    padding: 0.6rem 1.2rem;
    margin: 0 0.3rem;
    border-radius: 25px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    background: transparent;
}

.navbar-custom .nav-link:hover,
.navbar-custom .nav-link:focus {
    background: var(--primary-color);
    color: white !important;
    border: 2px solid var(--border-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 0 var(--shadow-color);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.navbar-custom .nav-link:active {
    transform: translateY(-1px);
    box-shadow: 0 2px 0 var(--shadow-color);
}

.navbar-toggler i {
    color: var(--text-primary) !important;
}

/* ==========================================
   主題切換按鈕
   ========================================== */
.theme-toggle-wrapper {
    display: flex;
    align-items: center;
    margin-left: 0.5rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 30px;
    padding: 0.35rem 0.9rem 0.35rem 0.4rem;
    font-weight: 700;
    color: var(--text-primary);
    box-shadow: 0 3px 0 var(--shadow-color);
    transition: all 0.25s ease;
    font-family: inherit;
    font-size: 0.95rem;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 var(--shadow-color);
    background: var(--card-bg-soft);
}

.theme-toggle:active {
    transform: translateY(0);
    box-shadow: 0 2px 0 var(--shadow-color);
}

.theme-toggle-track {
    position: relative;
    width: 56px;
    height: 28px;
    background: linear-gradient(135deg, #FFD93D, #FF9E2C);
    border-radius: 20px;
    border: 2px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
    overflow: hidden;
    flex-shrink: 0;
}

[data-theme="dark"] .theme-toggle-track {
    background: linear-gradient(135deg, #2C1810, #5D4037);
}

.theme-toggle-icon {
    font-size: 0.75rem;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    transition: opacity 0.3s ease;
}

.theme-icon-sun {
    color: #FFF;
    text-shadow: 0 0 4px rgba(255,158,44,0.8);
}

.theme-icon-moon {
    color: #C4A574;
}

[data-theme="light"] .theme-icon-sun { opacity: 1; }
[data-theme="light"] .theme-icon-moon { opacity: 0.4; }
[data-theme="dark"] .theme-icon-sun { opacity: 0.4; }
[data-theme="dark"] .theme-icon-moon { opacity: 1; }

.theme-toggle-thumb {
    position: absolute;
    top: 50%;
    left: 4px;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: #FFFDF2;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: left 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55), background 0.3s ease;
}

[data-theme="dark"] .theme-toggle-thumb {
    left: 30px;
    background: #FFB155;
}

.theme-toggle-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
}

/* Hero (保留以防其他頁面使用) */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
        url('/images/maple-bg.jpg') center/cover;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    border-bottom: 5px solid var(--border-color);
}

/* ==========================================
   外站平台入口卡片
   ========================================== */
.portal-section-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 0 rgba(255, 158, 44, 0.2);
}

.portal-section-title::before,
.portal-section-title::after {
    content: '';
    display: inline-block;
    width: 50px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    vertical-align: middle;
    margin: 0 1rem;
    border-radius: 2px;
}

.portal-row {
    margin-bottom: 0.5rem;
}

.portal-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.4rem;
    background: var(--card-bg);
    border: 3px solid var(--border-color);
    border-radius: 18px;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: 0 5px 0 var(--shadow-strong);
    transition: all 0.3s cubic-bezier(0.68, -0.3, 0.265, 1.3);
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 96px;
}

.portal-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.15) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
    pointer-events: none;
}

.portal-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 0 var(--shadow-strong);
    color: white;
    text-decoration: none;
}

.portal-card:hover::before {
    transform: translateX(100%);
}

.portal-card:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 0 var(--shadow-strong);
}

.portal-card--primary:hover {
    background: linear-gradient(135deg, var(--primary-color), #FF8A00);
}
.portal-card--accent:hover {
    background: linear-gradient(135deg, var(--accent-color), #2BA8D6);
}
.portal-card--secondary:hover {
    background: linear-gradient(135deg, var(--secondary-color), #7FA82E);
}
.portal-card--danger:hover {
    background: linear-gradient(135deg, var(--danger-color), #C0392B);
}

.portal-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    border: 2px solid var(--border-color);
    box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.15);
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.portal-card--primary .portal-card-icon {
    background: linear-gradient(135deg, var(--primary-color), #FF8A00);
}
.portal-card--accent .portal-card-icon {
    background: linear-gradient(135deg, var(--accent-color), #2BA8D6);
}
.portal-card--secondary .portal-card-icon {
    background: linear-gradient(135deg, var(--secondary-color), #7FA82E);
}
.portal-card--danger .portal-card-icon {
    background: linear-gradient(135deg, var(--danger-color), #C0392B);
}

.portal-card:hover .portal-card-icon {
    transform: rotate(-8deg) scale(1.1);
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-primary);
}

.portal-card-body {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-width: 0;
}

.portal-card-title {
    font-size: 1.2rem;
    font-weight: 900;
    line-height: 1.2;
    color: inherit;
    margin-bottom: 0.2rem;
}

.portal-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.3;
}

.portal-card:hover .portal-card-desc {
    color: rgba(255, 255, 255, 0.9);
}

.portal-card-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--card-bg-soft);
    border: 2px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.portal-card:hover .portal-card-arrow {
    background: white;
    color: var(--text-primary);
    transform: translateX(4px);
}

/* ==========================================
   Stats Section（已依需求移除 hover 浮起特效）
   ========================================== */
.stat-card {
    background: var(--card-bg);
    border-radius: 15px;
    border: 3px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 5px 0 var(--shadow-strong);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 8px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 15px 15px 0 0;
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: drop-shadow(2px 2px 0 var(--primary-color));
}

.stat-card:nth-child(1) .stat-icon { color: var(--primary-color); }
.stat-card:nth-child(2) .stat-icon { color: var(--secondary-color); }
.stat-card:nth-child(3) .stat-icon { color: var(--accent-color); }
.stat-card:nth-child(4) .stat-icon { color: var(--danger-color); }

.stat-card h3 {
    font-weight: 900;
    color: var(--text-primary);
    font-size: 2rem;
    text-shadow: 1px 1px 0 rgba(255, 158, 44, 0.3);
}

.stat-card p {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0;
}

/* 公告卡片 */
.announcement-card {
    background: var(--card-bg);
    border-radius: 20px;
    border: 3px solid var(--border-color);
    box-shadow: 0 6px 0 var(--shadow-strong);
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    overflow: hidden;
    position: relative;
}

.announcement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.announcement-card:hover {
    transform: translateY(-5px) rotate(1deg);
    box-shadow: 0 10px 0 var(--shadow-strong);
}

.announcement-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    padding: 1.2rem;
    font-weight: 700;
    text-shadow: 2px 2px 0 rgba(0,0,0,0.3);
}

/* FAB */
.fab-button {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 0 var(--shadow-strong);
    transition: all 0.3s ease;
    border: 3px solid var(--border-color);
}

.fab-button:hover {
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 8px 0 var(--shadow-strong);
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.floating {
    animation: float 3s ease-in-out infinite;
}

/* Logo */
.navbar-custom .navbar-brand {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 900;
    transition: transform 0.3s ease;
    text-shadow:
        2px 2px 0 rgba(255, 158, 44, 0.3),
        -1px -1px 0 rgba(255, 158, 44, 0.2);
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar-custom .navbar-brand:hover {
    transform: scale(1.08) rotate(-2deg);
    color: var(--primary-color);
}

.navbar-logo {
    height: 48px;
    width: auto;
    filter: drop-shadow(2px 2px 0 rgba(93, 64, 55, 0.3));
    transition: transform 0.3s ease;
}

.navbar-custom .navbar-brand:hover .navbar-logo {
    transform: rotate(10deg) scale(1.1);
}

/* RWD */
@media (min-width: 992px) {
    /* 桌機 ≥992px 4 張卡片並排（col-lg-3）時，縮小內部元素避免擁擠 */
    .portal-row .col-lg-3 .portal-card {
        padding: 1rem 1.1rem;
        gap: 0.75rem;
        min-height: 84px;
    }
    .portal-row .col-lg-3 .portal-card-icon {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
        border-radius: 12px;
    }
    .portal-row .col-lg-3 .portal-card-title {
        font-size: 1.08rem;
    }
    .portal-row .col-lg-3 .portal-card-desc {
        font-size: 0.78rem;
    }
    .portal-row .col-lg-3 .portal-card-arrow {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }
}

@media (max-width: 991.98px) {
    .theme-toggle-wrapper {
        margin: 0.5rem 0 0 0;
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .navbar-logo { height: 35px; }
    .navbar-custom .nav-link { margin: 0.3rem 0; }

    .portal-section-title { font-size: 1.2rem; }
    .portal-section-title::before,
    .portal-section-title::after {
        width: 25px;
        margin: 0 0.5rem;
    }

    .portal-card {
        padding: 1rem 1.1rem;
        min-height: 80px;
    }
    .portal-card-icon {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
    }
    .portal-card-title { font-size: 1.05rem; }
    .portal-card-desc { font-size: 0.78rem; }
    .portal-card-arrow {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }

    .theme-toggle {
        font-size: 0.85rem;
        padding: 0.3rem 0.7rem 0.3rem 0.35rem;
    }
    .theme-toggle-track {
        width: 48px;
        height: 24px;
    }
    .theme-toggle-thumb {
        width: 16px;
        height: 16px;
    }
    [data-theme="dark"] .theme-toggle-thumb {
        left: 26px;
    }
}

/* 動畫減少偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .floating { animation: none; }
}