@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700;900&family=Rajdhani:wght@400;500;600&display=swap');

:root {
    --bg:      #070b14;
    --surface: #0d1424;
    --card:    #111827;
    --border:  #1e2d45;
    --accent:  #00d4ff;
    --accent2: #ff3d6e;
    --x-color: #00d4ff;
    --o-color: #ff3d6e;
    --gold:    #ffd700;
    --text:    #e8f4ff;
    --muted:   #4a6380;
    --glow-x:  0 0 20px rgba(0, 212, 255, 0.5);
    --glow-o:  0 0 20px rgba(255, 61, 110, 0.5);
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
}

.screen {
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 20px;
}

.hidden { display: none !important; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 480px;
    position: relative;
    box-shadow: 0 0 60px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.05);
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 2px;
}

.title {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    font-weight: 900;
    text-align: center;
    letter-spacing: 4px;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--accent), #ffffff, var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 32px;
}

/* USERNAME SCREEN */
.input-group { margin-bottom: 16px; text-align: left; }

.input-group label {
    display: block;
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.input-group.player-x label { color: var(--x-color); }
.input-group.player-o label { color: var(--o-color); }

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-family: 'Rajdhani', sans-serif;
    font-size: 16px;
    font-weight: 500;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group.player-x input:focus { border-color: var(--x-color); box-shadow: var(--glow-x); }
.input-group.player-o input:focus { border-color: var(--o-color); box-shadow: var(--glow-o); }
.input-group input::placeholder { color: var(--muted); }

.vs-divider {
    text-align: center;
    font-family: 'Orbitron', monospace;
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--muted);
    margin: 8px 0 16px;
}

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-family: 'Rajdhani', sans-serif;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}

.btn:hover { transform: translateY(-2px); opacity: 0.9; }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #0099bb);
    color: var(--bg);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
    width: 100%;
    margin-top: 8px;
    text-align: center;
}

.btn-primary:hover { box-shadow: 0 6px 28px rgba(0, 212, 255, 0.5); }

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.button-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

.button-row .btn { flex: 1; min-width: 130px; text-align: center; }

/* SCORE */
.score {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 8px;
    margin-bottom: 20px;
    align-items: center;
}

.score-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 8px;
    text-align: center;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.score-box.active-x { border-color: var(--x-color); box-shadow: var(--glow-x); }
.score-box.active-o { border-color: var(--o-color); box-shadow: var(--glow-o); }
.score-box.draws { background: transparent; border-color: transparent; }

.score-name {
    display: block;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.score-number {
    display: block;
    font-family: 'Orbitron', monospace;
    font-size: 28px;
    font-weight: 700;
    line-height: 1;
}

#scoreXNum { color: var(--x-color); }
#scoreONum { color: var(--o-color); }
#scoreDraw { color: var(--muted); font-size: 20px; }

/* STATUS & TIMER */
.status {
    font-family: 'Orbitron', monospace;
    font-size: 13px;
    letter-spacing: 2px;
    text-align: center;
    min-height: 22px;
    margin-bottom: 8px;
    color: var(--text);
    text-transform: uppercase;
}

.timer-bar-wrap {
    height: 3px;
    background: var(--surface);
    border-radius: 3px;
    margin-bottom: 8px;
    overflow: hidden;
}

.timer-bar {
    height: 100%;
    width: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 1s linear, background 0.5s;
}

.timer-bar.low { background: var(--accent2); }

.timer-text {
    text-align: center;
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--muted);
    margin-bottom: 20px;
    font-family: 'Orbitron', monospace;
}

/* THE BOARD */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 0 auto 24px;
}

.square {
    aspect-ratio: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    font-family: 'Orbitron', monospace;
    font-size: 42px;
    font-weight: 900;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.1s;
    user-select: none;
}

.square:hover:not(.taken) {
    background: #161f30;
    border-color: var(--accent);
    box-shadow: var(--glow-x);
    transform: scale(1.04);
}

.square.x { color: var(--x-color); border-color: rgba(0,212,255,0.3); text-shadow: 0 0 12px rgba(0,212,255,0.7); }
.square.o { color: var(--o-color); border-color: rgba(255,61,110,0.3); text-shadow: 0 0 12px rgba(255,61,110,0.7); }
.square.taken { cursor: not-allowed; }
.square.taken:hover { transform: none; }

.square.winner {
    background: rgba(255,215,0,0.08);
    border-color: var(--gold);
    box-shadow: 0 0 24px rgba(255,215,0,0.4);
    animation: winner-pulse 0.7s ease-in-out infinite alternate;
}

@keyframes winner-pulse {
    from { transform: scale(1);    box-shadow: 0 0 16px rgba(255,215,0,0.3); }
    to   { transform: scale(1.06); box-shadow: 0 0 32px rgba(255,215,0,0.6); }
}

@keyframes pop-in {
    0%   { transform: scale(0.4); opacity: 0; }
    70%  { transform: scale(1.15); }
    100% { transform: scale(1); opacity: 1; }
}

.square.x, .square.o { animation: pop-in 0.2s ease-out; }

/* LEADERBOARD */
.leaderboard-container { text-align: center; }

.leaderboard-table { width: 100%; border-collapse: collapse; margin: 8px 0; }

.leaderboard-table th {
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.leaderboard-table td {
    padding: 14px 12px;
    border-bottom: 1px solid rgba(30,45,69,0.5);
    font-size: 16px;
    font-weight: 600;
}

.leaderboard-table tr:last-child td { border-bottom: none; }

.leaderboard-table tr.first-place td {
    color: var(--gold);
    font-family: 'Orbitron', monospace;
    font-size: 15px;
}

.rank { font-size: 22px; width: 50px; text-align: center; }
.loading, .no-scores { color: var(--muted); font-style: italic; padding: 30px 0; letter-spacing: 1px; }

@media (max-width: 480px) {
    .card { padding: 28px 20px; }
    .title { font-size: 1.5rem; letter-spacing: 2px; }
    .square { font-size: 32px; border-radius: 10px; }
}