body {
            font-family: "Segoe UI", Tahoma, sans-serif;
            background: url("../Barvy/abstract-1780386_1920 - kopie.png") no-repeat center center fixed;
            background-size: cover;
            background-color: #1a1a1a; 
            color: #f0f0f0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center; 
            align-items: center;     
            text-align: center;
            gap: 1.5rem;
            margin: 0;
        }

        h1 {
            font-family: 'Pacifico', cursive;
            font-size: 3rem;
            color: #ffffff;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.6);
        }

        header a {
            display: inline-block;
            padding: 0.8rem 1.6rem;
            font-size: 1.1rem;
            font-weight: 600;
            color: #000000;
            background: #ffffff;
            border: none;
            border-radius: 30px; 
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        header a:hover {
            background: #e0e0e0;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.4);
        }

        .center {
            background: rgba(255, 255, 255, 0.15);
            padding: 2rem;
            border-radius: 30px;
            box-shadow: 0 6px 16px rgba(0,0,0,0.4);
            backdrop-filter: blur(10px);
        }

        .kalendar {
            display: grid;
            grid-template-columns: repeat(7, 1fr); /* 7 sloupců */
            gap: 0.8rem;
            padding: 1rem;
        }

        .den {
            padding: 1rem;
            background: rgba(255,255,255,0.2);
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
            min-width: 40px;
        }

        .den:hover {
            background: #357abf;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.4);
        }

        .den.dnes {
            background: #4a90e2;
            color: #ffffff;
        }