:root {
    --color-dark: #1a1a1a;
    --color-border: #4a3621;
    --gradient-btn: linear-gradient(180deg, #d4a574 0%, #b8895e 50%, #9a6f45 100%);
    --gradient-btn-hover: linear-gradient(180deg, #e0b686 0%, #c49a70 50%, #a67d50 100%);
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial Black', Arial, sans-serif;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;
}

.game-container {
    width: 100vw;
    height: 100vh;
    max-width: 1440px;
    max-height: 1024px;
    position: relative;
    overflow: hidden;
    aspect-ratio: 1440 / 1024;
}

.background {
    position: absolute;
    inset: 0;
    background: url('../IMG-CG/background.png') center / cover no-repeat;
}

.title-container {
    position: absolute;
    top: 5%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1.4vw;
}

.title {
    font-size: clamp(32px, 5vw, 72px);
    font-weight: 900;
    color: var(--color-dark);
    white-space: nowrap;
    letter-spacing: 2px;
    text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.3), -1px -1px 0 rgba(255, 255, 255, 0.1);
    -webkit-text-stroke: 1px red;
}

.gun-icon {
    width: clamp(40px, 5.5vw, 80px);
    height: auto;
    filter: drop-shadow(2px 2px 3px rgba(0, 0, 0, 0.4));
    transform: translateY(20px);
}

.gun-left {
    transform: scaleX(-1) translateY(20px);
}

.menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    gap: clamp(12px, 1.4vw, 20px);
}

.btn {
    width: clamp(180px, 17.4vw, 250px);
    height: clamp(56px, 5.6vw, 80px);
    font-size: clamp(20px, 2.5vw, 36px);
    font-weight: bold;
    color: var(--color-dark);
    background: var(--gradient-btn);
    border: clamp(2px, 0.3vw, 4px) solid var(--color-border);
    border-radius: clamp(8px, 1vw, 15px);
    cursor: pointer;
    filter: drop-shadow(0 8px 12px rgba(0, 0, 0, 0.6));
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s, filter 0.1s;
}

.btn:hover {
    background: var(--gradient-btn-hover);
    transform: translateY(-2px);
    filter: drop-shadow(0 10px 16px rgba(0, 0, 0, 0.7));
}

.btn:active {
    transform: translateY(2px);
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.5));
}

.enemy-indicator {
    position: absolute;
    bottom: 3%;
    right: 2%;
    padding: clamp(10px, 1vw, 14px) clamp(16px, 1.6vw, 24px);
    font-size: clamp(13px, 1.3vw, 18px);
    font-weight: bold;
    color: var(--color-dark);
    text-align: center;
    line-height: 1.2;
    background: var(--gradient-btn);
    border: clamp(2px, 0.3vw, 3px) solid var(--color-border);
    border-radius: clamp(6px, 0.7vw, 10px);
    cursor: pointer;
    filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.6));
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s, filter 0.1s;
}

.notification-dot {
    display: none;
    position: absolute;
    top: -5px;
    right: -5px;
    width: clamp(12px, 1.2vw, 16px);
    height: clamp(12px, 1.2vw, 16px);
    background: #ff3333;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.reset-btn {
    position: absolute;
    bottom: 3%;
    left: 2%;
    padding: clamp(8px, 0.8vw, 12px) clamp(12px, 1.2vw, 18px);
    font-family: 'Arial Black', Arial, sans-serif;
    font-size: clamp(11px, 1.1vw, 14px);
    font-weight: bold;
    color: #ccc;
    background: linear-gradient(180deg, #444 0%, #222 100%);
    border: 2px solid #555;
    border-radius: clamp(4px, 0.5vw, 8px);
    cursor: pointer;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.5));
    transition: transform 0.1s, filter 0.1s;
}

.reset-btn:hover {
    background: linear-gradient(180deg, #555 0%, #333 100%);
    color: #fff;
    transform: translateY(-1px);
}

.reset-btn:active {
    transform: translateY(1px);
}

.enemy-indicator:hover {
    background: var(--gradient-btn-hover);
    transform: translateY(-1px);
    filter: drop-shadow(0 8px 12px rgba(0, 0, 0, 0.7));
}

.enemy-indicator:active {
    transform: translateY(2px);
    filter: drop-shadow(0 3px 5px rgba(0, 0, 0, 0.5));
}

@media (min-aspect-ratio: 1440/1024) {
    .game-container {
        width: auto;
        height: 100vh;
    }
}

@media (max-aspect-ratio: 1440/1024) {
    .game-container {
        width: 100vw;
        height: auto;
    }
}