/* Theme: gray */
:root {
    --primary-color: #6b7280;
    --primary-dark: #4b5563;
    --secondary-color: #9ca3af;
    --accent-color: #374151;
    --gradient-start: #6b7280;
    --gradient-end: #4b5563;
    --body-bg: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 50%, #d1d5db 100%);
    --button-bg: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.9));
    --button-hover-bg: linear-gradient(135deg, #4b5563, #374151);
    --button-border: #d1d5db;
    --text-color: #374151;
}


/* 主题样式应用 */
body {
    background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 50%, #d1d5db 100%) !important;
    color: #374151 !important;
}

.menu-buttons button {
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.9)) !important;
    border: 2px solid #d1d5db !important;
    color: #374151 !important;
}

.menu-buttons button:hover {
    background: linear-gradient(135deg, #4b5563, #374151) !important;
    border-color: #6b7280 !important;
    color: white !important;
}

.carousel-btn {
    background: #6b7280 !important;
    color: white !important;
}

.carousel-btn:hover {
    background: #4b5563 !important;
}

.back-to-top-btn {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
    color: white !important;
}

.category-icon {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

.theme-apply-btn {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
}

.loading-dot {
    background-color: #6b7280 !important;
}

.loading-spinner {
    border-top-color: #6b7280 !important;
}

/* 导航按钮样式 */
nav ul li a {
    color: white !important;
    background: rgba(255, 255, 255, 0.15) !important;
    border-radius: 8px !important;
    padding: 8px 16px !important;
    transition: all 0.3s ease !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    text-decoration: none !important;
    display: inline-block !important;
    font-weight: 500 !important;
}

nav ul li a:hover {
    color: white !important;
    background: #6b7280 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
    border: 2px solid #6b7280 !important;
}

/* 轮播图导航点 */
.carousel-dots .dot {
    background: #6b7280 !important;
    opacity: 0.3 !important;
}

.carousel-dots .dot.active {
    background: #6b7280 !important;
    opacity: 1 !important;
}

/* 头部标题 */
header h1 {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

/* 用户头部区域样式 */
.user-header {
    background: rgba(255, 255, 255, 0.95) !important;
}

.brand-logo {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

.user-avatar-btn {
    background: linear-gradient(135deg, #6b7280, #9ca3af) !important;
}

.coin-display {
    background: linear-gradient(135deg, #fbbf24, #f59e0b) !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .user-header {
        padding: 10px 15px !important;
    }
    
    body.user-logged-in {
        padding-top: 80px !important;
    }
}