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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    background: #000;
}

#cesiumContainer {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
}

/* Hide Cesium credits and other UI */
.cesium-viewer-bottom,
.cesium-viewer-toolbar,
.cesium-viewer-animationContainer,
.cesium-viewer-timelineContainer,
.cesium-viewer-fullscreenContainer {
    display: none !important;
}

/* ========== Menu Overlay ========== */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.menu-overlay.hidden {
    display: none;
}

.menu-container {
    background: linear-gradient(135deg, rgba(30, 40, 60, 0.95), rgba(20, 25, 40, 0.98));
    border: 1px solid rgba(100, 150, 255, 0.3);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    max-width: 600px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.lang-btn.selected {
    background: rgba(0, 212, 255, 0.2);
    border-color: #00d4ff;
    color: #00d4ff;
}

.menu-container.small {
    max-width: 400px;
    padding: 30px;
}

.game-title {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #00d4ff, #7c3aed, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
    margin-bottom: 5px;
    letter-spacing: 4px;
}

.game-subtitle {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.1rem;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.location-select h3,
.game-modes h3 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.location-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 25px;
}

.location-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.location-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.5);
    transform: translateY(-2px);
}

.location-btn.selected {
    background: rgba(0, 212, 255, 0.2);
    border-color: #00d4ff;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.location-btn .flag {
    font-size: 1.5rem;
}

.location-btn .city {
    color: #fff;
    font-size: 0.85rem;
}

.mode-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 25px;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px 20px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mode-btn.selected {
    background: rgba(124, 58, 237, 0.3);
    border-color: #7c3aed;
}

.start-button {
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    border: none;
    border-radius: 12px;
    padding: 18px 60px;
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 25px;
}

.start-button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
}

.controls-info {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 15px;
}

.controls-info h4 {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.controls-grid {
    display: grid;
    grid-template-columns: 60px 1fr 60px 1fr;
    gap: 8px 15px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
}

.controls-grid span:nth-child(odd) {
    color: #00d4ff;
    font-weight: 600;
    text-align: right;
}

.menu-button {
    display: block;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 15px;
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 10px;
}

.menu-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.final-stats {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
}

.final-stats p {
    color: #fff;
    font-size: 1.1rem;
    margin: 8px 0;
}

.final-stats span {
    color: #00d4ff;
    font-weight: 700;
}

/* ========== Loading Screen ========== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a0f1a, #1a1f3a);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.loading-overlay.hidden {
    display: none;
}

.loading-content {
    text-align: center;
    color: #fff;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: #00d4ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: 15px;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    width: 0%;
    transition: width 0.3s ease;
}

/* ========== HUD ========== */
#hud {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

#hud.hidden {
    display: none;
}

/* HUD Top Bar */
.hud-top {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 40px;
    align-items: center;
}

.hud-speed, .hud-score, .hud-vertical-speed {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hud-vertical-speed {
    padding: 10px 15px;
}

#vertical-speed {
    color: #00d4ff;
    font-size: 1rem;
    font-weight: 600;
    min-width: 70px;
    text-align: center;
}

#vertical-speed.climbing {
    color: #00ff88;
}

#vertical-speed.descending {
    color: #ff6b6b;
}

.hud-icon {
    font-size: 1.2rem;
}

#speed-value, #score-value {
    color: #00d4ff;
    font-size: 1.5rem;
    font-weight: 700;
    min-width: 60px;
}

.hud-unit {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* HUD Left - Altitude */
.hud-left {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.altitude-gauge {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    width: 80px;
}

.gauge-label {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.gauge-value {
    color: #00d4ff;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 5px 0;
}

.gauge-unit {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

.altitude-bar {
    width: 10px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    margin: 15px auto 0;
    position: relative;
    overflow: hidden;
}

.altitude-fill {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: linear-gradient(to top, #00d4ff, #7c3aed);
    border-radius: 5px;
    transition: height 0.1s ease;
}

/* HUD Right - Compass & Minimap */
.hud-right {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.compass {
    width: 80px;
    height: 80px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    position: relative;
}

.compass-ring {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.1s ease;
}

.compass-n, .compass-e, .compass-s, .compass-w {
    position: absolute;
    font-size: 0.7rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
}

.compass-n { top: 8px; left: 50%; transform: translateX(-50%); color: #ff4444; }
.compass-s { bottom: 8px; left: 50%; transform: translateX(-50%); }
.compass-e { right: 10px; top: 50%; transform: translateY(-50%); }
.compass-w { left: 10px; top: 50%; transform: translateY(-50%); }

.compass-needle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 4px;
    height: 4px;
    background: #00d4ff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px #00d4ff;
}

.minimap {
    width: 200px;
    height: 200px;
    background: rgba(0, 10, 20, 0.9);
    border: 2px solid rgba(0, 212, 255, 0.5);
    border-radius: 50%;
    position: relative;
    overflow: visible;
    box-shadow:
        0 0 20px rgba(0, 200, 255, 0.3),
        inset 0 0 30px rgba(0, 50, 80, 0.5);
}

#minimap-canvas {
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.minimap-plane {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #00d4ff;
    font-size: 1.2rem;
    text-shadow: 0 0 10px #00d4ff;
    transition: transform 0.1s ease;
}

.minimap::before {
    content: 'RADAR';
    position: absolute;
    top: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: rgba(0, 200, 255, 0.7);
    text-shadow: 0 0 5px rgba(0, 200, 255, 0.5);
}

/* HUD Bottom */
.hud-bottom {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 30px;
    align-items: center;
}

.fuel-gauge, .throttle-gauge, .ammo-gauge {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.fuel-icon, .throttle-label, .ammo-icon {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
}

.fuel-bar, .throttle-bar, .ammo-bar {
    width: 120px;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
}

.fuel-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff4444, #ffaa00, #00ff88);
    transition: width 0.3s ease;
    border-radius: 6px;
}

.throttle-fill {
    height: 100%;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    transition: width 0.1s ease;
    border-radius: 6px;
}

.ammo-fill {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    transition: width 0.1s ease;
    border-radius: 6px;
}

.ammo-value {
    color: #00d4ff;
    font-weight: 700;
    font-size: 0.9rem;
    min-width: 30px;
    text-align: right;
}

/* Missile Gauge */
.missile-gauge {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 100, 50, 0.5);
    border-radius: 10px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.missile-icon {
    font-size: 1.2rem;
}

.missile-count {
    color: #ff6644;
    font-weight: 700;
    font-size: 1.3rem;
    min-width: 20px;
    text-align: center;
}

.missile-key {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Flare Gauge */
.flare-gauge {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 170, 0, 0.5);
    border-radius: 10px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.flare-icon {
    font-size: 1.2rem;
}

.flare-count {
    color: #ffdd44;
    font-weight: 700;
    font-size: 1.3rem;
    min-width: 20px;
    text-align: center;
}

.flare-key {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Nuclear Bomb Gauge */
.nuke-gauge {
    background: rgba(20, 0, 0, 0.8);
    border: 1px solid rgba(255, 0, 0, 0.7);
    border-radius: 10px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.3);
}

.nuke-icon {
    font-size: 1.2rem;
    animation: nuke-pulse 2s ease-in-out infinite;
}

@keyframes nuke-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.nuke-count {
    color: #ff0000;
    font-weight: 700;
    font-size: 1.3rem;
    min-width: 20px;
    text-align: center;
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.8);
}

.nuke-key {
    color: rgba(255, 100, 100, 0.7);
    font-size: 0.75rem;
    font-weight: 600;
}

.fuel-percent, .throttle-percent {
    color: #fff;
    font-size: 0.9rem;
    min-width: 40px;
}

.objective {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 10px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
}

/* HUD Center */
.hud-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.crosshair {
    color: rgba(255, 255, 255, 0.4);
    font-size: 2rem;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.warning {
    background: rgba(255, 0, 0, 0.8);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 700;
    margin-top: 20px;
    animation: pulse 0.5s ease-in-out infinite;
}

.warning.hidden {
    display: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Checkpoint Indicator */
.checkpoint-indicator {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.checkpoint-indicator.hidden {
    display: none;
}

.checkpoint-arrow {
    font-size: 2rem;
    color: #00ff88;
    text-shadow: 0 0 20px #00ff88;
    transition: transform 0.1s ease;
}

.checkpoint-distance {
    color: #fff;
    font-size: 1rem;
    margin-top: 5px;
}

/* Camera Mode */
.camera-mode {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 8px 15px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

/* Flight Time */
.flight-time {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 8px 15px;
    color: #fff;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Controls Help Button */
.controls-help-btn {
    position: absolute;
    bottom: 80px;
    left: 20px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 8px 15px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: auto;
    cursor: pointer;
    transition: all 0.3s ease;
}

.controls-help-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: #00d4ff;
    color: #fff;
}

.controls-help-btn span:first-child {
    background: rgba(0, 212, 255, 0.2);
    border: 1px solid rgba(0, 212, 255, 0.5);
    border-radius: 4px;
    padding: 2px 8px;
    font-weight: 700;
    color: #00d4ff;
}

/* Controls Modal */
.controls-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 500;
    backdrop-filter: blur(5px);
    pointer-events: auto;
}

.controls-modal.hidden {
    display: none;
}

.controls-modal-content {
    background: linear-gradient(135deg, rgba(30, 40, 60, 0.95), rgba(20, 25, 40, 0.98));
    border: 1px solid rgba(100, 150, 255, 0.3);
    border-radius: 15px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.controls-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.controls-modal-content h3 {
    color: #fff;
    font-size: 1.5rem;
    margin: 0;
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.close-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: #fff;
}

.controls-modal-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 15px;
}

.control-key {
    background: rgba(0, 212, 255, 0.15);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 6px;
    padding: 8px 12px;
    color: #00d4ff;
    font-weight: 700;
    text-align: center;
    font-family: monospace;
    font-size: 0.9rem;
    min-width: 100px;
}

.control-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* Hit Message */
.hit-message {
    position: fixed;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 68, 68, 0.9);
    color: #fff;
    padding: 15px 40px;
    border-radius: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: hitPop 1.5s ease-out forwards;
    z-index: 1000;
    box-shadow: 0 0 30px rgba(255, 68, 68, 0.5);
    border: 2px solid #ff6666;
}

@keyframes hitPop {
    0% {
        opacity: 0;
        transform: translateX(-50%) scale(0.5);
    }
    20% {
        opacity: 1;
        transform: translateX(-50%) scale(1.2);
    }
    40% {
        transform: translateX(-50%) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(-50px) scale(0.8);
    }
}

/* Crosshair firing state */
.crosshair {
    transition: color 0.05s ease, text-shadow 0.05s ease;
}

/* ========== Speed Overlay ========== */
.speed-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(0, 100, 200, 0) 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.speed-overlay.active {
    opacity: 1;
    background: radial-gradient(ellipse at center, transparent 20%, rgba(0, 150, 255, 0.15) 80%);
}

/* ========== Missile Warning ========== */
.missile-warning {
    background: rgba(255, 50, 50, 0.9) !important;
    animation: missileFlash 0.3s ease-in-out infinite !important;
}

.enemy-warning {
    background: rgba(255, 165, 0, 0.9) !important;
}

@keyframes missileFlash {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

/* ========== Game Messages ========== */
.game-message {
    position: fixed;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 200, 100, 0.9);
    color: #fff;
    padding: 20px 50px;
    border-radius: 15px;
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    z-index: 1000;
    box-shadow: 0 0 40px rgba(0, 200, 100, 0.5);
    border: 2px solid #00ff88;
    animation: messagePopIn 0.5s ease-out;
}

.game-message.hidden {
    display: none;
}

.game-message.destroy {
    background: rgba(255, 100, 50, 0.9);
    box-shadow: 0 0 40px rgba(255, 100, 50, 0.5);
    border-color: #ff6644;
}

.game-message.warning {
    background: rgba(255, 200, 50, 0.9);
    box-shadow: 0 0 40px rgba(255, 200, 50, 0.5);
    border-color: #ffcc33;
    color: #333;
}

@keyframes messagePopIn {
    0% {
        opacity: 0;
        transform: translateX(-50%) scale(0.5) translateY(30px);
    }
    50% {
        transform: translateX(-50%) scale(1.1) translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) scale(1) translateY(0);
    }
}

/* ========== Screen Flash Effect ========== */
.flash-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 200;
    opacity: 0;
}

.flash-overlay.damage {
    background: rgba(255, 0, 0, 0.4);
    animation: flashDamage 0.3s ease-out;
}

.flash-overlay.kill {
    background: rgba(255, 150, 50, 0.3);
    animation: flashKill 0.4s ease-out;
}

@keyframes flashDamage {
    0% { opacity: 0.8; }
    100% { opacity: 0; }
}

@keyframes flashKill {
    0% { opacity: 0.6; }
    50% { opacity: 0.3; }
    100% { opacity: 0; }
}

/* ========== Enemy Indicator ========== */
.enemy-indicator {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 3px solid #ff4444;
    border-radius: 50%;
    pointer-events: none;
    z-index: 90;
    animation: enemyPulse 1s ease-in-out infinite;
}

.enemy-indicator::after {
    content: '⚠';
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    color: #ff4444;
    font-size: 1rem;
}

@keyframes enemyPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .game-title {
        font-size: 2.5rem;
    }

    .location-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .mode-buttons {
        flex-direction: column;
    }

    .controls-info {
        display: none;
    }

    .hud-left, .hud-right {
        display: none;
    }

    .hud-top {
        flex-direction: column;
        gap: 10px;
    }

    .hud-bottom {
        flex-direction: column;
        gap: 10px;
    }

    .controls-help-btn {
        display: none;
    }

    .controls-modal-content {
        padding: 20px;
        max-width: 90%;
    }

    .control-key {
        min-width: 80px;
        font-size: 0.8rem;
        padding: 6px 8px;
    }

    .control-desc {
        font-size: 0.85rem;
    }
}