/* Reset and Base Styles */
:root {
    --bg-dark: #030310;
    --neon-red: #ff3366;
    --neon-blue: #00f0ff;
    --neon-green: #39ff14;
    --neon-yellow: #ffd700;
    --card-bg: rgba(10, 10, 30, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

body {
    background-color: var(--bg-dark);
    color: #ffffff;
    font-family: 'Orbitron', sans-serif;
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Background Stars Animation Overlay */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at center, #0c0c2a 0%, #030310 100%);
}

/* Game Wrapper Container */
.game-wrapper {
    position: relative;
    width: 100vw;
    height: 100vh;
    max-width: 900px;
    max-height: 1000px;
    aspect-ratio: 9/10;
    background-color: rgba(3, 3, 16, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (max-width: 900px), (max-height: 1000px) {
    .game-wrapper {
        width: 100%;
        height: 100%;
        max-width: none;
        max-height: none;
        aspect-ratio: auto;
    }
}

/* Canvas styling */
#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    padding: 30px;
    transition: all 0.3s ease;
}

/* Full Screen Overlays */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 3, 16, 0.8);
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: opacity 0.4s ease;
}

.hidden {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

/* Menu Content & Titles */
.menu-content {
    max-width: 500px;
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

.logo-title {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 4px;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.logo-subtitle {
    font-family: 'Share Tech Mono', monospace;
    font-size: 1rem;
    color: #8888aa;
    letter-spacing: 2px;
}

/* Keyboard / Controls styling */
.controls-guide {
    text-align: left;
    width: 100%;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.controls-guide h3, .ship-select h3 {
    font-size: 0.9rem;
    color: var(--neon-blue);
    margin-bottom: 10px;
    letter-spacing: 1px;
    font-weight: 600;
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9rem;
    color: #ccc;
}

kbd {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    padding: 2px 6px;
    color: #fff;
    font-size: 0.8rem;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.3);
}

/* Ship Select Options */
.ship-select {
    width: 100%;
}

.ship-options {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 10px;
}

.ship-option {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 12px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    font-size: 0.8rem;
}

.ship-option:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.ship-option.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.ship-color-preview {
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 25px solid white;
    filter: drop-shadow(0 0 5px currentColor);
}

.ship-red { border-bottom-color: var(--neon-red); color: var(--neon-red); }
.ship-blue { border-bottom-color: var(--neon-blue); color: var(--neon-blue); }
.ship-green { border-bottom-color: var(--neon-green); color: var(--neon-green); }

/* Buttons & glow */
.btn {
    width: 100%;
    padding: 14px 28px;
    border-radius: 12px;
    border: none;
    font-size: 1.1rem;
    font-weight: 800;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-red));
    color: white;
}

.btn-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

/* HUD System Overlay */
.hud-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: start;
    z-index: 5;
    pointer-events: none;
}

.hud-left {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 200px;
}

.hud-bar-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bar-label {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.bar-container {
    background: rgba(0, 0, 0, 0.5);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid;
    padding: 1px;
}

.bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.15s ease-out;
}

.border-red { border-color: rgba(255, 51, 102, 0.3); }
.border-blue { border-color: rgba(0, 240, 255, 0.3); }

.bg-red {
    background: linear-gradient(90deg, #ff3366, #ff007f);
    box-shadow: 0 0 10px rgba(255, 51, 102, 0.5);
}

.bg-blue {
    background: linear-gradient(90deg, #00f0ff, #0072ff);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.text-red { color: var(--neon-red); }
.text-blue { color: var(--neon-blue); }
.text-yellow { color: var(--neon-yellow); }

/* Waves HUD */
.hud-center {
    text-align: center;
}

.wave-text {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 2px;
    color: white;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.alert-text {
    font-size: 0.9rem;
    color: var(--neon-red);
    font-weight: 800;
    letter-spacing: 2px;
    margin-top: 5px;
    animation: alertBlink 0.6s infinite alternate;
}

@keyframes alertBlink {
    0% { opacity: 0.3; }
    100% { opacity: 1; text-shadow: 0 0 10px var(--neon-red); }
}

/* Score display */
.score-box {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.score-label {
    font-size: 0.75rem;
    color: #8888aa;
    letter-spacing: 1px;
}

.score-val, .score-value {
    font-family: 'Share Tech Mono', monospace;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--neon-yellow);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

/* Powerups indicators on HUD bottom */
.powerups-indicator-list {
    position: absolute;
    bottom: -60vh;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.powerup-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.75rem;
    color: white;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    0% { transform: translateX(-20px); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

/* Game Over Stats list */
.final-stats {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 15px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-family: 'Share Tech Mono', monospace;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
    color: #ccc;
}

.menu-buttons {
    display: flex;
    gap: 15px;
    width: 100%;
}

/* Pop in menu animations */
.pop-in {
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* Unified Top Navigation Bar */
.unified-nav {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 25, 0.75);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 24px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 99;
}

.unified-nav .brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.unified-nav .brand-icon {
    font-size: 1.6rem;
    color: #00f0ff;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.unified-nav .brand-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #ffffff, #8888aa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.unified-nav .nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.unified-nav .btn {
    border: none;
    border-radius: 10px;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    transition: all 0.2s ease;
    text-decoration: none;
}

.unified-nav .btn:hover {
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255,255,255,0.05);
}

.unified-nav .btn-home {
    background: linear-gradient(135deg, #00f0ff, #0072ff);
    border-color: #00f0ff;
    color: #050515;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.unified-nav .btn-home:hover {
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
    color: #ffffff;
}

/* Ensure mobile layout doesn't break header */
@media (max-width: 600px) {
    .unified-nav {
        padding: 10px 16px;
    }
    .unified-nav .brand-title {
        font-size: 1.1rem;
    }
    .unified-nav .btn span {
        display: none;
    }
    .unified-nav .btn {
        padding: 8px;
    }
}