.t4e-countdown {
    box-sizing: border-box;
    width: 100%;
    padding: clamp(1.25rem, 4vw, 3rem);
    color: #f5f5f5;
    background: #282828;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

.t4e-countdown *,
.t4e-countdown *::before,
.t4e-countdown *::after {
    box-sizing: border-box;
}

.t4e-countdown-display {
    display: flex;
    min-height: 1.1em;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #39d353;
    font-size: clamp(3rem, 14vw, 9rem);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.1;
}

.t4e-countdown-overtime-label {
    margin-bottom: 0.35em;
    color: #ff453a;
    font-size: 0.22em;
    letter-spacing: 0.16em;
}

.t4e-countdown-is-overtime .t4e-countdown-display {
    color: #ff453a;
}

.t4e-countdown-progress {
    height: 0.65rem;
    margin: 1.5rem auto 2rem;
    overflow: hidden;
    border-radius: 999px;
    background: #282828;
}

.t4e-countdown-progress-bar {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: #39d353;
    transition: width 180ms linear;
}

.t4e-countdown-is-overtime .t4e-countdown-progress-bar {
    background: #ff453a;
}

.t4e-countdown fieldset {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: center;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
    border: 0;
}

.t4e-countdown legend,
.t4e-countdown-presets-label {
    width: 100%;
    margin-bottom: 0.65rem;
    color: #bdbdbd;
    font-size: 0.95rem;
    font-weight: 700;
}

.t4e-countdown label {
    display: grid;
    gap: 0.35rem;
    color: #bdbdbd;
    font-size: 0.8rem;
    text-align: left;
}

.t4e-countdown input {
    width: 6rem;
    padding: 0.65rem;
    border: 1px solid #444;
    border-radius: 0.35rem;
    color: #fff;
    background: #171717;
    font: inherit;
    font-variant-numeric: tabular-nums;
}

.t4e-countdown button {
    min-height: 2.65rem;
    padding: 0.65rem 1rem;
    border: 1px solid #39d353;
    border-radius: 0.4rem;
    color: #39d353;
    background: #111;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.t4e-countdown button:hover,
.t4e-countdown button:focus-visible {
    color: #050505;
    background: #39d353;
}

.t4e-countdown-start {
    min-width: 8rem;
    color: #050505 !important;
    background: #39d353 !important;
}

.t4e-countdown-is-running .t4e-countdown-start {
    border-color: #ff9f0a;
    color: #050505 !important;
    background: #ff9f0a !important;
}

.t4e-countdown-presets {
    margin: 1.5rem 0;
}

.t4e-countdown-preset-buttons,
.t4e-countdown-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
}

.t4e-countdown-preset-buttons button {
    min-height: 2rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.85rem;
}

.t4e-countdown-controls {
    margin: 0.75rem 0 1rem;
}

.t4e-countdown-message {
    margin: 1rem 0 0;
    color: #ff9f0a;
}

.t4e-countdown:fullscreen {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
    justify-content: center;
    padding: 5vh 6vw;
}

.t4e-countdown:fullscreen .t4e-countdown-display {
    font-size: clamp(5rem, 25vw, 24rem);
}

.t4e-countdown [hidden] {
    display: none !important;
}

@media (max-width: 480px) {
    .t4e-countdown fieldset {
        gap: 0.5rem;
    }

    .t4e-countdown input {
        width: 5rem;
    }

    .t4e-countdown button {
        padding: 0.6rem 0.75rem;
    }
}