/* ===== 后台统一导航栏样式 ===== 
   混搭風格：玻璃擬態 + 奢華質感 + 賽博朋克
   比例協調・深度打磨版
*/

:root {
    --accent: #FF6B00;
    --accent-400: #FF8A3C;
    --accent-300: #FFA55A;
    --accent-rgb: 255, 107, 0;
    
    --bg-primary: #0A0C10;
    --bg-secondary: #0F1422;
    --bg-card: rgba(21, 26, 40, 0.8);
    --bg-card-hover: rgba(30, 35, 53, 0.8);
    --bg-surface: rgba(26, 31, 46, 0.8);
    
    --border-strong: rgba(255, 255, 255, 0.1);
    --border-gold: rgba(255, 215, 0, 0.15);
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-tertiary: #64748B;
    
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

/* ===== 設計令牌 ===== */
:root {
    /* 玻璃擬態 */
    --glass-bg: rgba(21, 26, 40, 0.7);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --glass-border-bottom: 1px solid rgba(255, 215, 0, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* 發光效果 */
    --neon-glow: 0 0 20px rgba(var(--accent-rgb), 0.3);
    --neon-glow-strong: 0 0 30px rgba(var(--accent-rgb), 0.5);
    --gold-glow: 0 0 15px rgba(255, 215, 0, 0.2);
    
    /* 過渡動畫 */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 亮色主題 */
[data-theme="light"] {
    --bg-primary: #F8FAFC;
    --bg-secondary: #F1F5F9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(248, 250, 252, 0.9);
    --bg-surface: rgba(241, 245, 249, 0.9);
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --border-strong: rgba(0, 0, 0, 0.08);
}

/* ===== 佈局 ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-primary);
}

/* 側邊導航欄 - 玻璃擬態進化版 */
.admin-sidebar {
    width: 280px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-gold);
    padding: var(--space-6) 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    box-shadow: var(--glass-shadow);
    z-index: 100;
    transition: var(--transition-base);
}

/* 背景光效 */
.admin-sidebar::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--accent-rgb), 0.03) 0%, transparent 70%);
    opacity: 0.3;
    animation: rotate 30s linear infinite;
    pointer-events: none;
    z-index: -1;
}

/* 側邊欄標誌 */
.admin-sidebar-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    padding: 0 var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-gold);
    margin-bottom: var(--space-5);
    letter-spacing: -0.5px;
    position: relative;
}

.admin-sidebar-logo span {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent);
}

.admin-sidebar-logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: var(--space-5);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
    border-radius: var(--radius-full);
    box-shadow: var(--neon-glow);
}

/* 導航菜單 */
.admin-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: 0 var(--space-3);
}

/* 導航項 */
.admin-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

/* 導航項背景光效 */
.admin-nav-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--accent-rgb), 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
    z-index: -1;
}

.admin-nav-item:hover::before {
    opacity: 1;
    animation: rotate 15s linear infinite;
}

.admin-nav-item i {
    width: 24px;
    font-size: 18px;
    text-align: center;
    transition: var(--transition-base);
}

/* 懸停效果 */
.admin-nav-item:hover {
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    transform: translateX(4px);
}

.admin-nav-item:hover i {
    color: var(--accent);
    transform: scale(1.15);
    filter: drop-shadow(0 0 8px var(--accent));
}

/* 激活狀態 */
.admin-nav-item.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-400));
    color: white;
    box-shadow: var(--neon-glow);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.admin-nav-item.active i {
    color: white;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.5));
}

.admin-nav-item.active::before {
    display: none;
}

/* 主內容區 - 進化版 */
.admin-main {
    flex: 1;
    margin-left: 280px;
    padding: var(--space-6) var(--space-8);
    background: var(--bg-primary);
    min-height: 100vh;
    position: relative;
    transition: var(--transition-base);
}

/* 主內容背景光效 */
.admin-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: radial-gradient(circle at 0% 0%, rgba(var(--accent-rgb), 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* 頭部導航欄 */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-gold);
    position: relative;
    z-index: 1;
}

.admin-header h1 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 用戶信息 */
.admin-user {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    color: var(--text-secondary);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-gold);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.admin-user::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--accent-rgb), 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.admin-user:hover::before {
    opacity: 1;
    animation: rotate 15s linear infinite;
}

.admin-user i {
    color: var(--accent);
    font-size: 18px;
    filter: drop-shadow(0 0 8px var(--accent));
}

.admin-user span {
    font-size: 14px;
    font-weight: 500;
}

/* ===== 動畫定義 ===== */
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { 
        opacity: 1;
        transform: scale(1);
    }
    50% { 
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== 響應式 ===== */
@media (max-width: 1024px) {
    .admin-sidebar {
        width: 240px;
    }
    
    .admin-main {
        margin-left: 240px;
    }
    
    .admin-header h1 {
        font-size: 22px;
    }
}

@media (max-width: 768px) {
    /* 摺疊側邊欄 */
    .admin-sidebar {
        width: 80px;
        transform: translateX(0);
        transition: var(--transition-base);
    }
    
    /* 標誌摺疊 */
    .admin-sidebar-logo {
        font-size: 0;
        padding: 0 0 var(--space-6);
        text-align: center;
    }
    
    .admin-sidebar-logo::before {
        content: "F";
        font-size: 24px;
        font-weight: 700;
        color: var(--accent);
        text-shadow: 0 0 10px var(--accent);
    }
    
    .admin-sidebar-logo span {
        display: none;
    }
    
    .admin-sidebar-logo::after {
        left: 50%;
        transform: translateX(-50%);
        width: 30px;
    }
    
    /* 導航文本隱藏 */
    .admin-nav-item span {
        display: none;
    }
    
    .admin-nav-item {
        justify-content: center;
        padding: var(--space-3) 0;
    }
    
    .admin-nav-item i {
        width: auto;
        font-size: 22px;
        margin: 0;
    }
    
    /* 主內容區調整 */
    .admin-main {
        margin-left: 80px;
        padding: var(--space-4);
    }
    
    .admin-header {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
        margin-bottom: var(--space-6);
    }
    
    .admin-header h1 {
        font-size: 20px;
    }
    
    .admin-user {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .admin-sidebar {
        width: 70px;
    }
    
    .admin-main {
        margin-left: 70px;
        padding: var(--space-3);
    }
    
    .admin-header h1 {
        font-size: 18px;
    }
    
    .admin-user {
        padding: var(--space-1) var(--space-3);
        font-size: 13px;
    }
    
    .admin-user i {
        font-size: 16px;
    }
    
    .admin-nav-item i {
        font-size: 20px;
    }
}

/* 移動端側邊欄開關 */
.mobile-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    cursor: pointer;
    z-index: 1000;
    box-shadow: var(--neon-glow);
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .mobile-sidebar-toggle {
        display: flex;
    }
    
    .admin-sidebar {
        transform: translateX(-100%);
        z-index: 1001;
    }
    
    .admin-sidebar.open {
        transform: translateX(0);
        width: 240px;
    }
    
    .admin-sidebar.open .admin-sidebar-logo {
        font-size: 22px;
        padding: 0 var(--space-5) var(--space-6);
    }
    
    .admin-sidebar.open .admin-sidebar-logo::before {
        display: none;
    }
    
    .admin-sidebar.open .admin-sidebar-logo span {
        display: inline;
    }
    
    .admin-sidebar.open .admin-nav-item {
        justify-content: flex-start;
        padding: var(--space-3) var(--space-4);
    }
    
    .admin-sidebar.open .admin-nav-item span {
        display: inline;
    }
    
    .admin-sidebar.open .admin-nav-item i {
        width: 24px;
        font-size: 18px;
        margin-right: var(--space-3);
    }
    
    .admin-main {
        margin-left: 0;
    }
}

/* ===== 測試模式強化 ===== */
.test-mode .admin-sidebar-logo span {
    color: #2563EB;
}

.test-mode .admin-nav-item.active {
    background: linear-gradient(135deg, #2563EB, #3B82F6);
}

.test-mode .admin-user i {
    color: #2563EB;
}