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

body {
    font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: radial-gradient(circle at top left, rgba(99, 102, 241, 0.16), transparent 30%), var(--bg-main);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

.content {
    flex: 1;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.dashboard-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.container {
    width: 100%;
    max-width: 1280px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
    text-align: center;
}

.pong-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 24px;
    align-items: start;
}

.pong-main-column {
    min-width: 0;
}

.container h1 {
    color: var(--text-main);
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.scoreboard {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 30px;
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 10px;
}

.score-section {
    flex: 1;
}

.score-section h2 {
    color: #ffffff;
    font-size: 1.2em;
    margin-bottom: 10px;
}

.score {
    font-size: 3em;
    font-weight: bold;
    color: #00ff00;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
}

.center-line {
    width: 2px;
    height: 80px;
    background: rgba(255, 255, 255, 0.3);
    margin: 0 30px;
}

.canvas-shell {
    position: relative;
    margin: 0 auto 30px;
    width: min(100%, 800px);
}

#pongCanvas {
    display: block;
    margin: 0 auto;
    width: 100%;
    max-width: 800px;
    height: auto;
    background: #1a1a2e;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.submit-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(9, 9, 11, 0.72);
    border-radius: 10px;
}

.submit-overlay.hidden {
    display: none;
}

.submit-card {
    width: min(90%, 320px);
    padding: 20px;
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
    color: var(--text-main);
}

.submit-card h3 {
    margin-bottom: 8px;
    font-size: 1.15rem;
}

.submit-card p {
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.5;
}

.submit-card label {
    display: block;
    text-align: left;
    margin-bottom: 8px;
    color: var(--text-main);
    font-weight: 600;
}

.submit-card input {
    width: 100%;
    background: rgba(10, 10, 12, 0.9);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    padding: 12px 14px;
    margin-bottom: 12px;
    outline: none;
}

.submit-card input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.submit-card button {
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    padding: 11px 14px;
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.92), rgba(79, 70, 229, 0.88));
    color: white;
    font-weight: 700;
    cursor: pointer;
}

.controls {
    color: #ffffff;
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 10px;
    font-size: 1.1em;
}

.controls p {
    margin: 8px 0;
}

.controls strong {
    color: #00ff00;
}

.leaderboard-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
    padding: 18px;
    text-align: left;
}

.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 12px;
}

.leaderboard-header h2 {
    font-size: 1.1rem;
}

.leaderboard-header span {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.leaderboard-table-wrap {
    overflow: hidden;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(0, 0, 0, 0.24);
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 12px 10px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.leaderboard-table th {
    color: var(--text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.leaderboard-table td {
    color: var(--text-main);
}

.leaderboard-loading {
    color: var(--text-muted);
    text-align: center;
}

@media (max-width: 960px) {
    .pong-shell {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .content {
        padding: 20px;
    }

    .container h1 {
        font-size: 1.8em;
    }

    .container {
        padding: 20px;
    }
}