/* Full-screen sliding panel */
.full-screen-panel {
    position: fixed;
    top: 0;
    left: -100%;
    /* hidden initially */
    width: 100%;
    height: 100%;
    background: rgba(20, 20, 20, 0.95);
    /* darker for better contrast */
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Fira Code', monospace;
    font-size: 48px;
    text-align: center;
    z-index: 1000;
    transition: left 0.5s ease;
    backdrop-filter: blur(4px);
    /* subtle blur behind overlay */
}

/* Panel open state */
.full-screen-panel.open {
    left: 0;
}

/* Floating circular arrow on the left */
/* Floating circular arrow on the left */
.floating-arrow {
    position: fixed;
    left: 10px;
    top: 80%;
    /* lower on the screen */
    transform: translateY(-50%) rotate(0deg);
    width: 35px;
    /* smaller circle */
    height: 35px;
    /* smaller circle */
    background: #1e1e1e;
    color: #fff;
    font-size: 20px;
    /* smaller arrow icon */
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 1001;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.6);
    border: 2px solid #00ffea;
    transition: transform 0.3s ease, background 0.3s ease;
}

/* Rotate arrow when panel is open */
.floating-arrow.open {
    transform: translateY(-50%) rotate(180deg);
    background: #111;
}

/* Style the timer text inside the panel */
.full-screen-panel .time-left {
    font-family: 'Fira Code', monospace;
    font-size: 52px;
    color: #00ffea;
    /* main neon cyan */
    text-shadow:
        0 0 5px #00ffea,
        0 0 10px #00ffea,
        0 0 20px #00ffea,
        0 0 40px #00ffea;
    /* strong glow effect */
    line-height: 1.5;
}

/* Individual timer units */
.timer-unit {
    font-weight: bold;
    font-family: 'Fira Code', monospace;
    margin: 0 6px;
    padding: 2px 4px;
    border-radius: 6px;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
    display: inline-block;
    min-width: 70px;
}

/* Neon colors for each unit */
.timer-unit.days {
    color: #00ffea;
    text-shadow: 0 0 8px #00ffea;
}

/* cyan */
.timer-unit.hours {
    color: #ff9900;
    text-shadow: 0 0 8px #ff9900;
}

/* orange */
.timer-unit.minutes {
    color: #00ff00;
    text-shadow: 0 0 8px #00ff00;
}

/* green */
.timer-unit.seconds {
    color: #ff0000;
    text-shadow: 0 0 8px #ff0000;
}

.timer-unit.milliseconds {
    color: #3700ff;
    text-shadow: 0 0 8px #3700ff;
}

/* red */