:root {
    --bg-dark: #0a0a0f;
    --neon-green: #39ff14;
    --nokia-green: #43523d;
    --nokia-dark: #202b1f;
    --neon-cyan: #0ff;
    --neon-pink: #ff00ff;
    --neon-orange: #ff4500;
    --neon-purple: #9d00ff;
    --text-light: #f0f0f0;
    --glass-bg: rgba(20, 20, 30, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(57, 255, 20, 0.05) 0%, transparent 50%),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
}

.hidden {
    display: none !important;
}

/* Nokia Boot Screen */
.nokia-boot {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--nokia-green);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 1s ease-out;
}

.nokia-boot::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.1),
        rgba(0, 0, 0, 0.1) 2px,
        transparent 2px,
        transparent 4px
    );
    pointer-events: none;
}

.nokia-text {
    font-family: 'Press Start 2P', cursive;
    color: var(--nokia-dark);
    font-size: 5rem;
    letter-spacing: 10px;
    animation: bootPulse 2s infinite alternate;
}

@keyframes bootPulse {
    0% { opacity: 0.8; text-shadow: none; }
    100% { opacity: 1; text-shadow: 0 0 10px rgba(32, 43, 31, 0.5); }
}

/* Game Container */
#game-container {
    width: 800px;
    border-radius: 16px;
    box-shadow: 0 0 40px rgba(57, 255, 20, 0.2), 0 0 100px rgba(0, 0, 0, 0.8);
    overflow: hidden;
    background: #000;
    display: flex;
    flex-direction: column;
}

canvas {
    display: block;
    width: 800px;
    height: 600px;
}

.canvas-wrapper {
    position: relative;
    width: 800px;
    height: 600px;
}

/* Score Panel */
.score-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(10, 10, 15, 0.9);
    border-bottom: 2px solid #222;
    z-index: 10;
}

.score-box, .high-score-box, .level-box, .gems-box {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 10px 15px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #aaa;
    margin-bottom: 4px;
}

#score, #high-score, #level, #gems {
    font-family: 'Press Start 2P', cursive;
    font-size: 1.2rem;
    color: var(--neon-green);
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.hud-bottom {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    pointer-events: none;
    z-index: 10;
}

/* Power-up Status */
#power-up-status {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 10px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 200px;
}

#power-up-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.8));
}

.progress-bar {
    flex-grow: 1;
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    overflow: hidden;
}

#power-up-progress {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 4px;
    transform-origin: left;
    transition: transform 0.1s linear;
}

/* Combo Display */
#combo-display {
    animation: comboPop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.combo-text {
    font-family: 'Press Start 2P', cursive;
    font-size: 1.5rem;
    color: var(--neon-orange);
    text-shadow: 0 0 15px rgba(255, 69, 0, 0.8), 0 0 30px rgba(255, 69, 0, 0.4);
    -webkit-text-stroke: 1px #fff;
}

@keyframes comboPop {
    0% { transform: scale(0.5); opacity: 0; }
    80% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* Overlays & Modals */
.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 20;
    pointer-events: auto;
}

#overlay-title {
    font-family: 'Press Start 2P', cursive;
    font-size: 3rem;
    color: #ff003c;
    text-shadow: 0 0 20px rgba(255, 0, 60, 0.6);
    margin-bottom: 20px;
}

#overlay-points {
    font-size: 1.5rem;
    margin-bottom: 40px;
}

#overlay-points span {
    font-family: 'Press Start 2P', cursive;
    color: var(--neon-green);
}

.overlay-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s ease;
    pointer-events: auto;
}

.btn.primary {
    background: var(--neon-green);
    color: #000;
    box-shadow: 0 0 15px rgba(57, 255, 20, 0.4);
}

.btn.primary:hover {
    background: #4dff2b;
    box-shadow: 0 0 25px rgba(57, 255, 20, 0.6);
    transform: translateY(-2px);
}

.btn.secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2) inset;
}

.btn.secondary:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4) inset, 0 0 15px rgba(0, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* Shop Modal */
.modal {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 30;
    pointer-events: auto;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    width: 600px;
    max-width: 90%;
    max-height: 90%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    position: relative;
    display: flex;
    flex-direction: column;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    color: #aaa;
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.2s;
}

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

.modal h2 {
    font-family: 'Press Start 2P', cursive;
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.shop-gems {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 20px;
    background: rgba(0,0,0,0.3);
    padding: 10px;
    border-radius: 8px;
}

#shop-gem-count {
    color: var(--neon-cyan);
    font-weight: 700;
    font-size: 1.4rem;
}

.skins-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    overflow-y: auto;
    padding: 10px;
}

.skin-card {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s ease;
}

.skin-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
}

.skin-preview {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #222; /* Default bg */
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.skin-preview-snake {
    width: 30px;
    height: 10px;
    border-radius: 5px;
}

.skin-name {
    font-weight: 700;
    margin-bottom: 10px;
    text-align: center;
}

.btn-equip {
    width: 100%;
    padding: 8px;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    background: #333;
    color: #fff;
    transition: background 0.2s;
}

.btn-equip.affordable {
    background: var(--neon-cyan);
    color: #000;
}

.btn-equip.equipped {
    background: var(--neon-green);
    color: #000;
    cursor: default;
}

.btn-equip:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Shake Animation for Damage */
@keyframes shakeConfig {
    0% { transform: translate(1px, 1px) rotate(0deg); }
    10% { transform: translate(-1px, -2px) rotate(-1deg); }
    20% { transform: translate(-3px, 0px) rotate(1deg); }
    30% { transform: translate(3px, 2px) rotate(0deg); }
    40% { transform: translate(1px, -1px) rotate(1deg); }
    50% { transform: translate(-1px, 2px) rotate(-1deg); }
    60% { transform: translate(-3px, 1px) rotate(0deg); }
    70% { transform: translate(3px, 1px) rotate(-1deg); }
    80% { transform: translate(-1px, -1px) rotate(1deg); }
    90% { transform: translate(1px, 2px) rotate(0deg); }
    100% { transform: translate(1px, -2px) rotate(-1deg); }
}

.shake {
    animation: shakeConfig 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

.flash-red {
    box-shadow: inset 0 0 100px rgba(255, 0, 0, 0.8) !important;
}

/* Auth Styles */
.input-field {
    width: 100%;
    padding: 15px;
    background: rgba(0,0,0,0.5);
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: 'Press Start 2P', cursive;
    font-size: 1rem;
    border-radius: 8px;
    outline: none;
    text-align: center;
    transition: all 0.3s;
}

.input-field:focus {
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
    background: rgba(0, 0, 0, 0.8);
}

.player-profile {
    position: absolute;
    top: 0;
    right: 20px;
    background: var(--glass-bg);
    padding: 8px 20px;
    border-radius: 0 0 12px 12px;
    font-size: 0.8rem;
    color: var(--neon-cyan);
    border: 1px solid var(--glass-border);
    border-top: none;
    display: flex;
    gap: 20px;
    z-index: 15;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.player-profile span {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

.player-profile a {
    color: var(--neon-orange);
    text-decoration: none;
    cursor: pointer;
    font-weight: 700;
    transition: color 0.2s;
}

.player-profile a:hover {
    color: #ff884d;
}

/* Profiles List */
.profiles-list {
    max-height: 200px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    padding-right: 5px;
}

.profile-btn {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    color: var(--neon-cyan);
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.profile-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--neon-cyan);
    transform: translateX(5px);
}

.profile-score {
    font-family: 'Press Start 2P', cursive;
    font-size: 0.7rem;
    color: var(--neon-orange);
}