/* Neon Snake — Cyber Neon Style */

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

:root {
    --neon-green:    #39ff14;
    --neon-green-2:  #9eff7a;
    --neon-cyan:     #00f0ff;
    --neon-cyan-2:   #66f6ff;
    --neon-magenta:  #ff2bd6;
    --neon-pink:     #ffd8f5;
    --bg-deep:       #050505;
    --bg-mid:        #0a0014;
    --bg-panel:      rgba(8, 8, 18, 0.7);
    --text-main:     #eaffea;
    --text-muted:    #5d7585;
    --warn-red:      #ff3355;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(ellipse at 50% 0%, #1a002b 0%, var(--bg-mid) 45%, var(--bg-deep) 100%);
    color: var(--text-main);
    min-height: calc(100dvh - 3.5rem);
}

/* ============ GRID BACKGROUND ============ */
#grid-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
    background-size: 2.5rem 2.5rem;
    animation: gridShift 18s linear infinite;
    opacity: 0.6;
}

@keyframes gridShift {
    0%   { background-position: 0 0, 0 0; }
    100% { background-position: 2.5rem 2.5rem, 2.5rem 2.5rem; }
}

/* ============ SCREENS ============ */
.screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--bg-deep);
    color: var(--text-main);
    z-index: 1000;
}

.hidden { display: none !important; }

.loading-spinner {
    width: 3.25rem;
    height: 3.25rem;
    border: 3px solid rgba(0, 240, 255, 0.15);
    border-top-color: var(--neon-cyan);
    border-radius: 50%;
    animation: spinAnim 1s linear infinite;
}

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

#loading-screen p {
    margin-top: 1rem;
    color: var(--neon-cyan);
    font-size: 0.95rem;
    letter-spacing: 0.1rem;
}

.login-content { text-align: center; }
.login-icon { font-size: 3.5rem; margin-bottom: 1rem; }
.login-content h2 { color: var(--neon-cyan); margin-bottom: 0.5rem; }
.login-content p { color: var(--text-muted); }

/* ============ GAME CONTAINER ============ */
#game-container {
    width: 100%;
    max-width: 31.25rem;
    height: 100%;
    max-height: 51.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 0.75rem;
    position: relative;
    z-index: 1;
}

/* ============ HEADER ============ */
#game-header {
    width: 100%;
    padding: 0.4rem 0;
    display: flex;
    justify-content: center;
}

.balance-display {
    background: linear-gradient(180deg, rgba(57, 255, 20, 0.10) 0%, rgba(0, 240, 255, 0.05) 100%);
    border: 1px solid rgba(57, 255, 20, 0.35);
    border-radius: 1.25rem;
    padding: 0.4rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    box-shadow: 0 0 1.1rem rgba(57, 255, 20, 0.18);
}

.balance-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.04rem;
}

#balance-value {
    color: var(--neon-green);
    font-size: 1.25rem;
    font-weight: 700;
    min-width: 4.5rem;
    text-align: right;
    text-shadow: 0 0 0.6rem rgba(57, 255, 20, 0.55);
}

.balance-currency {
    color: var(--neon-cyan);
    font-size: 0.75rem;
    font-weight: 700;
}

/* ============ STATS BAR ============ */
.stats-bar {
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0.5rem 0.75rem;
    margin-top: 0.5rem;
    background:
        linear-gradient(180deg, #060611 0%, #0a0a1c 100%) padding-box,
        linear-gradient(90deg, var(--neon-green), var(--neon-cyan) 50%, var(--neon-magenta)) border-box;
    border: 1px solid transparent;
    border-radius: 0.625rem;
}

.stat {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 0.08rem;
    text-transform: uppercase;
    font-weight: 700;
}

#snake-length {
    color: var(--neon-green);
    font-size: 1.35rem;
    font-weight: 800;
    text-shadow: 0 0 0.7rem rgba(57, 255, 20, 0.6);
}

#time-left {
    color: var(--neon-cyan);
    font-size: 1.35rem;
    font-weight: 800;
    text-shadow: 0 0 0.7rem rgba(0, 240, 255, 0.6);
    transition: color 0.2s ease;
}

#time-left.warning {
    color: var(--warn-red);
    text-shadow: 0 0 0.8rem rgba(255, 51, 85, 0.7);
    animation: timerPulse 0.8s ease-in-out infinite;
}

.stat-unit {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 700;
    margin-left: 0.1rem;
}

@keyframes timerPulse {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.1); }
}

/* ============ GAME AREA ============ */
#game-area {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 0.75rem 0;
}

.canvas-frame {
    position: relative;
    background:
        linear-gradient(180deg, #04040a 0%, #02020a 100%) padding-box,
        linear-gradient(135deg, var(--neon-green) 0%, var(--neon-cyan) 50%, var(--neon-magenta) 100%) border-box;
    border: 2px solid transparent;
    border-radius: 0.875rem;
    padding: 0.5rem;
    box-shadow:
        0 0 0 1px rgba(0,0,0,0.8),
        0 0 2rem rgba(57, 255, 20, 0.25),
        0 0 4rem rgba(255, 43, 214, 0.15),
        inset 0 1px 0 rgba(255,255,255,0.04);
}

#game-canvas {
    display: block;
    border-radius: 0.5rem;
    background: var(--bg-deep);
    touch-action: none;
}

#touch-overlay {
    position: absolute;
    inset: 0.5rem;
    z-index: 5;
    touch-action: none;
}

/* ============ INSTRUCTION ============ */
#instruction {
    position: absolute;
    bottom: 0.625rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(5, 5, 5, 0.85);
    border: 1px solid rgba(0, 240, 255, 0.4);
    border-radius: 0.4rem;
    padding: 0.25rem 0.75rem;
    z-index: 8;
    pointer-events: none;
}

#instruction span {
    color: var(--neon-cyan);
    font-size: 0.7rem;
    letter-spacing: 0.08rem;
    text-transform: uppercase;
}

/* ============ RESULT DISPLAY ============ */
#result-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(160deg, rgba(8, 8, 24, 0.97) 0%, rgba(20, 0, 30, 0.97) 100%);
    padding: 1.25rem 2rem;
    border-radius: 0.875rem;
    border: 1px solid var(--neon-cyan);
    box-shadow:
        0 0 0 1px rgba(0, 240, 255, 0.2),
        0 0 3rem rgba(0, 240, 255, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    z-index: 20;
    text-align: center;
    animation: resultPopup 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-width: 13rem;
}

@keyframes resultPopup {
    0%   { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
    100% { transform: translate(-50%, -50%) scale(1);   opacity: 1; }
}

#result-icon {
    font-size: 2.5rem;
    margin-bottom: 0.4rem;
}

#result-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0.15rem;
    margin-bottom: 0.4rem;
}

#result-title.win {
    color: var(--neon-green);
    text-shadow: 0 0 0.9rem rgba(57, 255, 20, 0.7);
}

#result-title.lose {
    color: var(--text-muted);
}

#result-length {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.55rem;
    letter-spacing: 0.05rem;
}

#result-multiplier {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--neon-magenta);
    text-shadow: 0 0 0.9rem rgba(255, 43, 214, 0.6);
    margin-bottom: 0.25rem;
}

#result-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--neon-green);
    text-shadow: 0 0 0.7rem rgba(57, 255, 20, 0.5);
}

/* ============ MESSAGE DISPLAY ============ */
#message-display {
    position: fixed;
    bottom: 7.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(5, 5, 5, 0.94);
    padding: 0.5rem 1.4rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(255, 43, 214, 0.4);
    z-index: 100;
    white-space: nowrap;
}

#message-text {
    color: var(--text-main);
    font-size: 0.85rem;
}

/* ============ BET CONTROLS ============ */
#bet-controls {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 0.25rem;
    flex-wrap: wrap;
}

.bet-label {
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08rem;
    text-transform: uppercase;
}

.bet-buttons { display: flex; gap: 0.4rem; }

.bet-btn {
    width: 3rem;
    height: 2rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 0.4rem;
    color: rgba(234, 255, 234, 0.65);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.bet-btn:hover:not(:disabled) {
    border-color: var(--neon-cyan);
    color: var(--text-main);
    background: rgba(0, 240, 255, 0.08);
}

.bet-btn.active {
    background: linear-gradient(160deg, var(--neon-green) 0%, var(--neon-cyan) 100%);
    color: #04031a;
    border-color: var(--neon-green-2);
    box-shadow: 0 0.125rem 0.75rem rgba(57, 255, 20, 0.4);
}

.bet-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ============ ACTION BUTTON ============ */
#action-button {
    width: 12rem;
    height: 3.25rem;
    background: linear-gradient(160deg, var(--neon-green) 0%, var(--neon-cyan) 55%, var(--neon-magenta) 100%);
    border: 1px solid rgba(158, 255, 122, 0.5);
    border-radius: 1.625rem;
    cursor: pointer;
    box-shadow:
        0 0.25rem 1.4rem rgba(57, 255, 20, 0.45),
        0 1px 0 rgba(255, 255, 255, 0.2) inset;
    transition: all 0.18s ease;
    margin: 0.5rem 0;
    font-family: inherit;
}

#action-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.9rem rgba(0, 240, 255, 0.55);
}

#action-button:active:not(:disabled) {
    transform: translateY(0);
}

#action-button:disabled {
    background: linear-gradient(160deg, #1e1e34 0%, #14141f 100%);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: none;
    cursor: not-allowed;
}

#action-button.playing {
    background: linear-gradient(160deg, #1a1a2c 0%, #100920 100%);
    border-color: rgba(255, 43, 214, 0.3);
}

#action-button.pulse {
    animation: buttonPulse 2s ease-in-out infinite;
}

@keyframes buttonPulse {
    0%, 100% { box-shadow: 0 0.25rem 1.4rem rgba(57, 255, 20, 0.45); }
    50%       { box-shadow: 0 0.25rem 2.5rem rgba(255, 43, 214, 0.75); }
}

#action-text {
    color: #04031a;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.2rem;
}

#action-button.playing #action-text {
    color: rgba(234, 255, 234, 0.5);
}

#action-button:disabled #action-text {
    color: #555;
}

/* ============ GAME TITLE ============ */
.game-title {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    padding: 0.25rem 0 0.4rem;
}

.title-neon {
    color: rgba(234, 255, 234, 0.35);
    font-size: 0.7rem;
    letter-spacing: 0.15rem;
    text-transform: uppercase;
}

.title-snake {
    color: var(--neon-magenta);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.15rem;
    text-shadow: 0 0 0.9rem rgba(255, 43, 214, 0.55);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 25rem) {
    .canvas-frame { padding: 0.35rem; }
    #action-button { width: 10rem; height: 2.85rem; }
    #action-text { font-size: 1.05rem; letter-spacing: 0.15rem; }
    .bet-btn { width: 2.6rem; height: 1.85rem; font-size: 0.8rem; }
    #snake-length, #time-left { font-size: 1.15rem; }
}

@media (max-height: 43.75rem) {
    #game-area { padding: 0.4rem 0; }
    .canvas-frame { padding: 0.35rem; }
    .stats-bar { padding: 0.35rem 0.7rem; }
    #action-button { height: 2.85rem; }
}