/* HUDエリア */
.hud-container {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9;
}

.hud-text {
    position: absolute;
    font-size: 14px;
    color: var(--hud-color);
    text-shadow: 0 0 5px var(--hud-color);
    opacity: 1;
    transition: opacity 0.3s;
}

.hud-text.fade {
    opacity: 0;
}

.hud-score {
    top: 20px;
    left: 20px;
}

.hud-level {
    top: 20px;
    right: 20px;
}

.hud-ammo {
    bottom: 60px;
    right: 20px;
}

.hud-health {
    top: 50px;
    left: 20px;
    color: var(--health-color);
    text-shadow: 0 0 5px var(--health-color);
}

.hud-weapon {
    bottom: 20px;
    right: 20px;
}

.hud-lock {
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    color: var(--locked-color);
    font-weight: bold;
    text-shadow: 0 0 10px var(--locked-color);
    opacity: 0;
}

.hud-status {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

/* チャージメーター */
.hud-charge-container {
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 200px;
}

.hud-charge-label {
    font-size: 12px;
    margin-bottom: 5px;
    color: var(--charge-color);
}

.hud-charge-bar {
    width: 100%;
    height: 10px;
    background-color: rgba(50, 50, 50, 0.5);
    border: 1px solid var(--charge-color);
    border-radius: 5px;
    overflow: hidden;
}

.hud-charge-fill {
    height: 100%;
    width: 0%;
    background-color: var(--charge-color);
    box-shadow: 0 0 10px var(--charge-color);
    transition: width 0.1s linear;
}

/* 照準切り替えコントロール */
.controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 20;
}

.control-button {
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--hud-color);
    border: 1px solid var(--hud-color);
    border-radius: 5px;
    padding: 5px 10px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    transition: all 0.3s;
}

.control-button:hover {
    background-color: rgba(0, 100, 100, 0.3);
    box-shadow: 0 0 10px var(--reticle-color);
}

.control-button.active {
    background-color: rgba(0, 100, 100, 0.5);
    box-shadow: 0 0 10px var(--reticle-color);
}

/* 警告表示 */
.warning-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--warning-color);
    font-size: 24px;
    font-weight: bold;
    text-shadow: 0 0 10px var(--warning-color);
    opacity: 0;
    z-index: 15;
    animation: warning-flash 1s ease-in-out infinite;
}

@keyframes warning-flash {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}