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

:root {
    --x-color: #ff5a6e;
    --o-color: #4ecdc4;
    --bg-dark: #1a1a2e;
    --bg-card: #16213e;
    --bg-board: #0f3460;
    --text-light: #eaeaea;
    --text-dim: #a0a0b0;
    --gold: #f5c542;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --font-display: 'Bangers', cursive;
    --font-body: 'Nunito', sans-serif;
}

body {
    min-height: 100vh;
    background: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-body);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(78,205,196,0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255,90,110,0.08) 0%, transparent 60%);
}

#game-wrapper {
    max-width: 680px;
    padding: 16px;
}

#game-container {
    background: var(--bg-card);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 24px 22px 28px;
    position: relative;
    overflow: hidden;
}

#game-header {
    text-align: center;
    margin-bottom: 14px;
}
#game-header h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 3px;
    color: var(--text-light);
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.subtitle {
    color: var(--text-dim);
    font-size: 0.88rem;
    margin-top: 2px;
}

#stats-bar {
    display: flex;
    align-items: center;    
    justify-content: center;
    gap: 0;
    background: rgba(255,255,255,0.04);
    border-radius: 14px;
    padding: 10px 8px;
    margin-bottom: 16px;
}
.stat-box {
    flex: 1;
    text-align: center;
}
.stat-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-dim);
    margin-bottom: 2px;
}
.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    line-height: 1.2;
    color: var(--gold);
}
.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    margin: 0 6px;
}

#canvas-wrap {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    background: #000;
    margin-bottom: 14px;
    aspect-ratio: 11000 / 10500;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 18px;
}

.overlay {
    position: absolute;
    inset: 0;
    background: rgba(22, 33, 62, 0.90);
    backdrop-filter: blur(6px);
    border-radius: 18px;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10;
    animation: fadeIn 0.3s ease;
}
.overlay.active {
    display: flex;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.overlay-inner {
    text-align: center;
    animation: popIn 0.35s cubic-bezier(.34,1.56,.64,1);
    padding: 24px;
}
@keyframes popIn {
    0%   { transform: scale(0.75); opacity: 0; }
    100% { transform: scale(1);    opacity: 1; }
}

.overlay-icon {
    font-size: 3rem;
    margin-bottom: 6px;
    display: block;
    animation: bob 1.8s ease-in-out infinite;
}
@keyframes bob {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}

.overlay-title {
    font-family: var(--font-display);
    font-size: 2.2rem;
    letter-spacing: 3px;
    color: var(--text-light);
    margin-bottom: 8px;
}
.over-title {
    color: var(--x-color);
    text-shadow: 0 0 18px rgba(255,90,110,0.35);
}

.overlay-sub {
    color: var(--text-dim);
    font-size: 0.88rem;
    margin-bottom: 18px;
}
.overlay-sub kbd {
    display: inline-block;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    padding: 2px 8px;
    font-family: var(--font-body);
    font-size: 0.82rem;
    color: var(--text-light);
    border: 1px solid rgba(255,255,255,0.15);
}

.difficulty-row {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 22px;
}
.diff-btn {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 7px 18px;
    border: 2px solid rgba(255,255,255,0.12);
    border-radius: 10px;
    background: rgba(255,255,255,0.06);
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s;
}
.diff-btn:hover {
    border-color: var(--o-color);
    color: var(--o-color);
}
.diff-btn.active {
    background: var(--o-color);
    border-color: var(--o-color);
    color: #1a1a2e;
    box-shadow: 0 3px 12px rgba(78,205,196,0.35);
}

.over-btn-row {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.play-btn {
    font-family: var(--font-body);
    font-weight: 900;
    font-size: 1.05rem;
    letter-spacing: 2px;
    padding: 12px 32px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--x-color), #e84565);
    color: #fff;
    cursor: pointer;
    box-shadow: 0 4px 18px rgba(255,90,110,0.4);
    transition: transform 0.15s, filter 0.2s;
}
.play-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.12);
}
.play-btn:active {
    transform: translateY(0);
}

#home-btn {
    background: linear-gradient(135deg, var(--o-color), #3cb8af);
    box-shadow: 0 4px 18px rgba(78,205,196,0.4);
}

.result-card {
    background: rgba(255,255,255,0.05);
    border-radius: 14px;
    padding: 16px 28px;
    margin: 0 auto 22px;
    width: fit-content;
    min-width: 180px;
}
.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
}
.result-row + .result-row {
    border-top: 1px solid rgba(255,255,255,0.07);
}
.result-label {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
}
.result-val {
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: var(--gold);
}

.new-best-row {
    display: none;
    justify-content: center;
    padding-top: 8px !important;
    border-top: none !important;
}
.new-best-row.show {
    display: flex;
}
.new-best-badge {
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 2px;
    color: var(--gold);
    background: rgba(245,197,66,0.15);
    border-radius: 8px;
    padding: 4px 14px;
    animation: pulse 1s ease infinite alternate;
}
@keyframes pulse {
    from { box-shadow: 0 0 6px rgba(245,197,66,0.3); }
    to   { box-shadow: 0 0 16px rgba(245,197,66,0.6); }
}

#controls-hint {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.78rem;
}
#controls-hint kbd {
    display: inline-block;
    background: rgba(255,255,255,0.08);
    border-radius: 5px;
    padding: 1px 7px;
    border: 1px solid rgba(255,255,255,0.12);
    font-family: var(--font-body);
    font-size: 0.76rem;
    color: var(--text-light);
}

@media (max-width: 520px) {
    #game-container { padding: 18px 14px 22px; }
    #game-header h1 { font-size: 1.6rem; }
    .overlay-title { font-size: 1.7rem; }
    .play-btn { padding: 10px 40px; font-size: 0.95rem; }
}