:root {
    --bg-color: #0d0a11;
    --panel-bg: rgba(20, 15, 25, 0.75);
    --text-main: #F4EBD9;
    --text-muted: #B8A89A;
    --accent: #55FFDD;
    --glass-border: rgba(85, 255, 221, 0.25);
    
    --font-heading: 'Noto Sans TC', sans-serif;
    --font-body: 'Noto Sans TC', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-body);
    margin: 0;
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .hero-title {
    font-family: var(--font-heading);
    letter-spacing: 2px;
}

/* --- 防盜圖保護 (Anti-Theft Protection) --- */
img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    
    pointer-events: none; /* 讓右鍵點擊穿透，不會觸發「另存圖片」 */
}
/* ------------------------------------- */

/* Background particle effect layer */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(30, 25, 40, 0.4) 0%, rgba(10, 10, 15, 0.85) 100%),
        url('/static/img/bg.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.glass-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 15, 19, 0.4);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: clamp(1rem, 4vw, 1.6rem);
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: clamp(1px, 0.5vw, 3px);
    text-shadow: 0 0 15px rgba(85, 255, 221, 0.4);
    white-space: nowrap;
}

.nav-logo svg {
    width: clamp(32px, 8vw, 48px);
    height: clamp(32px, 8vw, 48px);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--accent);
}

.login-btn, .profile-btn {
    background: rgba(85, 255, 221, 0.1);
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.5rem 1.2rem;
    border-radius: 4px;
    font-weight: bold;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(85, 255, 221, 0.1) inset;
}

.login-btn:hover, .profile-btn:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 20px rgba(85, 255, 221, 0.4);
    transform: translateY(-2px);
}

/* User Dropdown in Navbar */
.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-profile-btn {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 1rem 0.4rem 0.4rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.user-profile-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
}

.nav-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-nickname {
    font-weight: bold;
    color: var(--text-main);
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-dropdown-icon {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: transform 0.3s;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 15px); /* Set distance using pixels for reliable pseudo-element bridging */
    right: 0;
    width: 180px;
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.user-dropdown:hover .dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.user-dropdown:hover .nav-dropdown-icon {
    transform: rotate(180deg);
}

/* 隱形橋樑：填補按鈕與選單之間的空隙，防止滑鼠經過間隙時 hover 狀態中斷 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 0;
    width: 100%;
    height: 15px;
}

/* Sidebar Menu button */
.menu-btn {
    display: none; /* hidden on desktop */
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s;
}
.menu-btn:hover {
    color: var(--accent);
}

/* Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Sidebar Menu */
.sidebar-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: rgba(15, 15, 19, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-left: 1px solid var(--glass-border);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
}
.sidebar-menu.active {
    right: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.sidebar-title {
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: 500;
    margin: 0;
}
.close-menu-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.3s;
}
.close-menu-btn:hover {
    color: #ff4444;
}

.sidebar-links {
    display: flex;
    flex-direction: column;
    padding: 1rem 0;
    overflow-y: auto;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s, color 0.3s;
}
.sidebar-link i {
    width: 20px;
    text-align: center;
    color: #fff;
}
.sidebar-link:hover {
    background: rgba(255,255,255,0.05);
    color: #fff;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.sidebar-divider {
    height: 1px;
    background: rgba(255,255,255,0.05);
    margin: 1rem 2rem;
}

.sidebar-user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(255,255,255,0.02);
}

/* Override the 120px max-width truncation for sidebar */
.sidebar-user-profile .nav-nickname {
    max-width: none;
    white-space: normal;
    word-break: break-word;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1rem;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
}

.logout-link:hover {
    color: #ff4444;
    background: rgba(255, 68, 68, 0.1);
}

.container {
    max-width: 1200px;
    margin: 100px auto 40px;
    padding: 0 2rem;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 4px; /* Sharper medieval edges */
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    position: relative;
}

/* Ornate subtle glow around panels */
.glass-panel::before {
    content: '';
    position: absolute;
    top: -1px; left: -1px; right: -1px; bottom: -1px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    opacity: 0.1;
    pointer-events: none;
}

/* Home Page */
.hero-section {
    text-align: center;
    padding: 4rem 0;
    animation: fadeIn 1s ease-out;
}

.hero-title {
    font-size: clamp(1.2rem, 4.5vw, 2.5rem);
    font-weight: 900;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, #a0a0b0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.btn-primary, .btn-secondary, .btn-danger {
    font-family: var(--font-heading);
    letter-spacing: 1px;
    border-radius: 4px;
}
.btn-primary {
    background: rgba(85, 255, 221, 0.15);
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.8rem 2rem;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s;
}
.btn-primary:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px rgba(85, 255, 221, 0.4);
    transform: translateY(-3px) scale(1.05);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Member List */
.member-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.member-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.member-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.08);
    border-color: var(--accent);
    box-shadow: 0 15px 30px rgba(255, 85, 170, 0.15);
}

.member-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    object-fit: cover;
    border: 2px solid rgba(255,255,255,0.1);
}

.member-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.3s;
    position: relative;
}

.tab-btn.active {
    color: var(--accent);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s;
}

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

/* Member Detail Profile */
.profile-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 2px solid var(--glass-border);
}

.markdown-body {
    line-height: 1.6;
    color: #e0e0e0;
}
.markdown-body a, .markdown-content a {
    color: var(--accent);
    text-decoration: none;
    transition: filter 0.2s, text-shadow 0.2s;
}
.markdown-body a:hover, .markdown-content a:hover {
    text-decoration: underline;
    filter: brightness(1.2);
    text-shadow: 0 0 8px var(--accent);
}

/* Commission Board */
.board {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-bottom: 1rem;
}

.board-column {
    width: 100%;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--glass-border);
}

.column-header {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.task-card {
    background: var(--panel-bg);
    border-radius: 8px;
    padding: 1.2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    transition: transform 0.2s;
}

.task-card:hover {
    transform: translateY(-4px);
}

/* Themes for tasks */
.theme-red { border-left: 4px solid #ff4444; }
.theme-yellow { border-left: 4px solid #ffbb33; }
.theme-green { border-left: 4px solid #00C851; }
.theme-blue { border-left: 4px solid #33b5e5; }

/* Mobile RWD Settings for Base and Navbar */
@media (max-width: 1024px) {
    .nav-links {
        display: none !important;
    }
    .menu-btn {
        display: block;
    }
    .nav-content {
        padding: 0.5rem 1.5rem;
    }
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .glass-panel {
        padding: 1rem;
    }
    .task-list {
        grid-template-columns: 1fr;
    }
}

/* Rhythmic Lantern Glow Animation */
@keyframes rhythmicGlow {
    /* 呼~ (Slow, 1s) */
    0% { filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent) 60%, transparent)); transform: scale(1); }
    16.6% { filter: drop-shadow(0 0 12px color-mix(in srgb, var(--accent) 90%, transparent)); transform: scale(1.02); }
    /* 吸~ (Slow, 2s) */
    33.3% { filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent) 60%, transparent)); transform: scale(1); }
    /* 呼~ (Slow, 3s) */
    50% { filter: drop-shadow(0 0 12px color-mix(in srgb, var(--accent) 90%, transparent)); transform: scale(1.02); }
    /* 吸~ (Slow, 4s) */
    66.6% { filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent) 60%, transparent)); transform: scale(1); }
    /* 呼 (Fast, 4.5s) */
    75% { filter: drop-shadow(0 0 10px color-mix(in srgb, var(--accent) 80%, transparent)); transform: scale(1.01); }
    /* 吸 (Fast, 5s) */
    83.3% { filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent) 60%, transparent)); transform: scale(1); }
    /* 呼 (Fast, 5.5s) */
    91.6% { filter: drop-shadow(0 0 10px color-mix(in srgb, var(--accent) 80%, transparent)); transform: scale(1.01); }
    /* 吸 (Fast, 6s) */
    100% { filter: drop-shadow(0 0 5px color-mix(in srgb, var(--accent) 60%, transparent)); transform: scale(1); }
}

.lantern-glow {
    animation: rhythmicGlow 6s ease-in-out infinite;
    transform-origin: center center;
}