* {
    box-sizing: border-box;
}

.odpocet-countdown-wrapper {
    /* Definice základních měřítek pro snadnou údržbu */
    --odpocet-scale: 1;
    --odpocet-font-title-final: calc(var(--odpocet-font-title, 24px) * var(--odpocet-scale));
    --odpocet-font-numbers-final: calc(var(--odpocet-font-numbers, 32px) * var(--odpocet-scale));
    --odpocet-font-labels-final: calc(var(--odpocet-font-labels, 12px) * var(--odpocet-scale));
    --odpocet-font-info-final: calc(var(--odpocet-font-info, 16px) * var(--odpocet-scale));
    --odpocet-reg-count-font-size-final: calc(var(--odpocet-reg-count-font-size, 16px) * var(--odpocet-scale));
    
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--odpocet-color-main-text, #333);
    margin: 24px 0;
    padding: 0;
    border-radius: 18px;
    /* Wrapper je nyní čistě kontejner, skleněný efekt se soustředí na sekce */
    background: transparent;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    transition: background 0.3s ease;
}

.odpocet-countdown-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* TIMER SECTION */
.timer-section {
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    /* Jemný bílý okraj pro simulaci hrany skla */
    border: 1px solid rgba(255, 255, 255, 0.25);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timer-section:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* Efekt zrcadlového odlesku */
.timer-section::after {
    content: "";
    position: absolute;
    top: 0;
    left: -150%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: skewX(-25deg);
    pointer-events: none;
}

.timer-section:hover::after {
    left: 150%;
    transition: left 0.7s ease-in-out;
}

.timer-label {
    font-size: var(--odpocet-font-title-final);
    font-weight: 700;
    color: var(--odpocet-color-labels);
    margin: 0 0 25px 0;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* TIMER CONTAINER */
.timer-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

/* TIMER BOX */
.timer-box {
    background: var(--odpocet-color-timer-box-bg, #ffffff);
    border: 3px solid var(--odpocet-color-box-dark);
    border-radius: 10px;
    padding: 25px 20px;
    text-align: center;
    min-width: 90px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.timer-box:hover {
    border-color: var(--odpocet-color-numbers);
    box-shadow: 0 6px 16px rgba(30, 115, 190, 0.15);
    transform: scale(1.05);
}

.timer-box .d,
.timer-box .h,
.timer-box .m,
.timer-box .s {
    font-size: var(--odpocet-font-numbers-final);
    font-weight: 800;
    color: var(--odpocet-color-numbers);
    line-height: 1;
    margin-bottom: 12px;
    font-variant-numeric: tabular-nums;
}

.timer-box .unit {
    font-size: var(--odpocet-font-labels-final);
    color: var(--odpocet-color-labels);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
    margin: 0;
}

.timer-expired {
    text-align: center;
    font-size: var(--odpocet-font-info-final);
    color: var(--odpocet-color-info-text);
    font-style: italic;
    padding: 25px;
}

/* REGISTRATION INFO */
.registration-info {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, rgba(30, 115, 190, 0.08), rgba(30, 115, 190, 0.04));
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--odpocet-color-numbers);
}

.registration-info strong {
    font-size: var(--odpocet-font-info-final);
    color: var(--odpocet-color-numbers);
    font-weight: 700;
    display: block;
}

/* BUTTON */
.registration-button-container {
    text-align: center;
}

.odpocet-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--odpocet-color-button), var(--odpocet-color-button-hover));
    color: white;
    padding: 16px 40px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(30, 115, 190, 0.3);
    border: none;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.odpocet-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(30, 115, 190, 0.4);
}

.odpocet-button:active {
    transform: translateY(-1px);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .odpocet-countdown-wrapper {
        --odpocet-scale: 0.85;
    }

    .timer-section {
        padding: 20px;
    }

    .timer-container {
        gap: 10px;
    }

    .timer-box {
        min-width: 75px;
        padding: 18px 14px;
    }
    
    .registration-info {
        padding: 15px;
    }
    
    .odpocet-button {
        padding: 14px 32px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .odpocet-countdown-wrapper {
        --odpocet-scale: 0.7;
    }

    .timer-section {
        padding: 15px;
    }

    .timer-box {
        min-width: 60px;
        padding: 14px 10px;
    }

    .odpocet-button {
        width: 100%;
        padding: 12px 24px;
        font-size: 13px;
    }
}