h1 {
        text-align: center;
        color: #50A085;
        margin-bottom: 30px;
        font-size: 2.5rem;
        font-weight: 700;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    }

    .new {
        font-size: 12px;
        font-weight: bold;
        color: white;
        display: inline-block;
        margin-top: 8px;
    }

    .new strong {
        background-color: red;
        border-radius: 50%;
        color: white;
        display: inline-block;
        width: 25px;
        height: 25px;
        text-align: center;
        margin-right: 3px;
    }

    .filter-section {
        margin-bottom: 30px;
        padding: 25px;
    }

    .filter-title {
        color: white;
        font-size: 1.3rem;
        font-weight: bold;
        margin-bottom: 20px;
        text-align: center;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .instructors {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
    }

    .instructor {
        background-color: #393d47;
        padding: 15px;
        border-radius: 25px;
        text-align: center;
        font-weight: bold;
        color: #d5ec8b;
        transition: all 0.3s ease;
        cursor: pointer;
        border: 2px solid #d5ec8b;
        user-select: none;
        flex: 1 1 150px;
        min-width: 120px;
        text-transform: uppercase;
    }

    .instructor:hover {
        transform: translateY(-3px);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    }

    .instructor.active {
        border-color: #A4D470;
        box-shadow: 0 8px 25px rgba(184, 233, 134, 0.4);
    }

    .instructor.inactive {
        opacity: 0.5;
    }

    .controls {
        text-align: center;
        margin-bottom: 20px;
    }

    .btn {
        background: #B8E986;
        color: #3D5A5A;
        border: none;
        padding: 12px 25px;
        margin: 0 10px;
        border-radius: 25px;
        font-weight: bold;
        cursor: pointer;
        transition: all 0.3s ease;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .btn:hover {
        background: #A4D470;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(164, 212, 112, 0.4);
    }

    .schedule {
        display: grid;
        grid-template-columns: repeat(7, 1fr);
        gap: 15px;
    }

    .day {
        background: #393d47;
        border-radius: 25px;
        padding: 20px 10px;
        transition: all 0.3s ease;
        border: 2px solid #4a5058;
    }

    .day:hover {
        border-color: #50A085;
    }

    .day-header {
        background: linear-gradient(135deg, #50A085 0%, #3D8B71 100%);
        color: white;
        padding: 20px 15px 15px 15px;
        margin: -22px -12px 20px -12px;
        border-radius: 25px 25px 0 0;
        text-align: center;
        font-weight: bold;
        font-size: 1.2rem;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .time-slot {
        background: rgba(255, 255, 255, 0.1);
        margin-bottom: 15px;
        padding: 13px;
        border-radius: 20px;
        border-left: 3px solid #50A085;
        transition: all 0.3s ease;
        opacity: 1;
        position: relative;
        user-select: none;
    }

    .time-slot span.anytime {
        color: #50A085;
        font-size: 0.7rem;
        line-height: 0.7rem;
        display: inline-block;
        font-weight: bold;
        background: white;
        padding: 4px 10px;
        border-radius: 15px;
    }

    .time-slot.reg::before {
        content: "";
        display: inline-block;
        position: absolute;
        top: 15px;
        right: 15px;
        width: 10px;
        height: 10px;
        background-color: red;
        border-radius: 50%;
        opacity: .75;
    }

    .time-slot:hover {
        background: rgba(255, 255, 255, 0.25);
        border-left-color: #B8E986;
        transform: translateX(5px);
        box-shadow: 0 5px 15px rgba(80, 160, 133, 0.3);
    }

    .time-slot.hidden {
        opacity: 0;
        transform: scale(0.8) translateY(-10px);
        max-height: 0;
        margin-bottom: 0;
        padding-top: 0;
        padding-bottom: 0;
        overflow: hidden;
        pointer-events: none;
    }

    .time-slot.hiding {
        animation: slideOut 0.4s ease-in-out forwards;
    }

    .time-slot.showing {
        animation: slideIn 0.4s ease-in-out forwards;
    }

    @keyframes slideOut {
        0% {
            opacity: 1;
            transform: scale(1) translateY(0);
            max-height: 200px;
            margin-bottom: 15px;
            padding-top: 15px;
            padding-bottom: 15px;
        }

        50% {
            opacity: 0.5;
            transform: scale(0.9) translateY(-5px);
        }

        100% {
            opacity: 0;
            transform: scale(0.8) translateY(-10px);
            max-height: 0;
            margin-bottom: 0;
            padding-top: 0;
            padding-bottom: 0;
        }
    }

    @keyframes slideIn {
        0% {
            opacity: 0;
            transform: scale(0.8) translateY(-10px);
            max-height: 0;
            margin-bottom: 0;
            padding-top: 0;
            padding-bottom: 0;
        }

        50% {
            opacity: 0.5;
            transform: scale(0.9) translateY(-5px);
            max-height: 100px;
            margin-bottom: 8px;
            padding-top: 8px;
            padding-bottom: 8px;
        }

        100% {
            opacity: 1;
            transform: scale(1) translateY(0);
            max-height: 200px;
            margin-bottom: 15px;
            padding-top: 15px;
            padding-bottom: 15px;
        }
    }

    .time {
        font-weight: bold;
        color: #50A085;
        font-size: 0.9rem;
        line-height: .9rem;
        margin-bottom: 8px;
    }

    .class-name {
        font-weight: bold;
        color: #ffffff;
        margin-bottom: 5px;
        font-size: 0.95rem;
        line-height: .95rem;
        text-transform: uppercase;
    }

    .instructor-name {
        color: #B8E986;
        font-size: 0.85rem;
        line-height: .85rem;
        font-weight: 600;
        text-transform: uppercase;
    }

    .registration {
        background: #B8E986;
        color: #3D5A5A;
        font-size: 0.7rem;
        line-height: .7rem;
        padding: 4px 10px;
        border-radius: 15px;
        margin-top: 6px;
        display: inline-block;
        font-weight: bold;
    }

    .book {
        color: white;
        font-size: 0.7rem;
        line-height: 0.7rem;
        display: inline-block;
        font-weight: bold;
        background: #50A085;
        padding: 4px 10px;
        border-radius: 15px;
    }

    .book:hover {
        background: #33856b;
    }

    .period {
        background: linear-gradient(135deg, #B8E986 0%, #A4D470 100%);
        color: #3D5A5A;
        padding: 12px;
        margin: 15px -14px;
        text-align: center;
        font-weight: bold;
        font-size: 0.9rem;
        line-height: .9rem;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    /* Reszponzív design */
    @media (max-width: 1200px) {
        .schedule {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    @media (max-width: 768px) {
        .schedule {
            grid-template-columns: repeat(2, 1fr);
        }

        h1 {
            font-size: 2rem;
        }

        .instructors {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 480px) {
        .schedule {
            grid-template-columns: 1fr;
        }

        h1 {
            font-size: 1.5rem;
        }

        .instructors {
            grid-template-columns: 1fr;
        }
    }

    /* === Hétváltó navigáció (dinamikus bővítés) === */
    .day-date {
        display: block;
        font-size: 0.75em;
        font-weight: normal;
        opacity: 0.75;
        margin-top: 3px;
    }

    .week-nav {
        text-align: center;
        margin-bottom: 20px;
    }

    .week-nav .btn {
        text-decoration: none;
        display: inline-block;
    }

    .btn-disabled {
        opacity: 0.3;
        cursor: default;
        pointer-events: none;
    }