* { font-family: 'Inter', sans-serif; }
        body {
            background: radial-gradient(circle at 10% 30%, rgba(66, 153, 225, 0.15) 0%, transparent 30%),
                        radial-gradient(circle at 90% 70%, rgba(159, 122, 234, 0.12) 0%, transparent 35%),
                        linear-gradient(145deg, #f9fafc 0%, #f1f4f9 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            margin: 0;
            padding: 16px;
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border: 1px solid rgba(255, 255, 255, 0.7);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255,255,255,0.6) inset;
        }
        .input-focus-ring:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 4px rgba(59,130,246,0.15);
        }
        .message.active {
            display: flex;
        }
        .loading.active {
            display: flex;
        }
        .spinner {
            border: 3px solid rgba(255,255,255,0.2);
            border-top: 3px solid white;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            animation: spin 0.7s linear infinite;
        }
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
        .hidden-panel { display: none; }
        .active-panel { display: block; }
        
        /* Кнопка вибору мови сторінки - по центру */
        .page-language-wrapper {
            display: flex;
            justify-content: center;
            margin-bottom: 16px;
            width: 100%;
        }
        
        .page-language-selector {
            display: inline-flex;
            gap: 6px;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(8px);
            padding: 6px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.8);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            margin: 0 auto;
        }
        
        .page-lang-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: none;
            background: transparent;
            font-size: 18px;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #4a5568;
            font-weight: 500;
        }
        
        .page-lang-btn:hover {
            background: rgba(59, 130, 246, 0.1);
            transform: scale(1.1);
        }
        
        .page-lang-btn.active {
            background: #3b82f6;
            color: white;
            box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
        }