/* --- BỐ CỤC PHÒNG THÍ NGHIỆM SCI-FI --- */
.scifi-arena {
    height: 180px;
    background: radial-gradient(circle at 50% 50%, #0d1b2a 0%, #000000 100%);
    box-shadow: inset 0 0 20px #00e5ff;
    position: relative;
    overflow: hidden;
    border: 4px solid #00e5ff;
    border-radius: 12px;
}

/* Lưới lazer quét */
.lazer-grid {
    position: absolute;
    width: 100%; height: 100%;
    background: 
        linear-gradient(rgba(0, 229, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.5;
    animation: grid-move 5s linear infinite;
    z-index: 1;
}
@keyframes grid-move {
    0% { transform: translateY(0); }
    100% { transform: translateY(20px); }
}

/* Robot ngủ đông (Mờ và nổi nhẹ) */
.robot-item {
    position: absolute;
    left: 45%;
    top: 35%;
    font-size: 4.5rem;
    z-index: 3;
    transition: all 0.4s ease;
}
.sleep-mode {
    filter: grayscale(100%) brightness(0.5);
    animation: float-sleep 3s ease-in-out infinite alternate;
}
@keyframes float-sleep {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

/* Robot nạp điện thành công */
.power-up {
    filter: grayscale(0%) drop-shadow(0 0 20px #00e5ff);
    transform: scale(1.2);
    animation: pulse-power 1s ease-in-out forwards;
}
@keyframes pulse-power {
    0% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.3); filter: brightness(2); }
    100% { transform: scale(1.2); }
}

/* Tia điện bắn vào Robot */
.laser-beam {
    position: absolute;
    height: 6px;
    background-color: #00e5ff;
    box-shadow: 0 0 15px #00e5ff, 0 0 30px #ffffff;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    animation: shoot-laser 0.2s linear forwards;
}
@keyframes shoot-laser {
    0% { left: 10%; width: 20px; opacity: 1; }
    100% { left: 45%; width: 100px; opacity: 0; }
}

/* Nổ chập mạch */
.shake-error { animation: glitch 0.3s infinite; }
@keyframes glitch {
    0% { transform: translate(0) scale(1.2); }
    20% { transform: translate(-10px, 5px); }
    40% { transform: translate(10px, -5px); }
    60% { transform: translate(-5px, 10px); }
    80% { transform: translate(5px, -10px); }
    100% { transform: translate(0); }
}

.min-h-75 { min-height: 90px; }
.hl-num { color: #00e5ff; font-weight: 900; font-size: 1.2em; }