body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #2d3436;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    text-align: center;
    max-width: 650px;
    width: 95%;
}

header h1 {
    margin-top: 0;
    color: #1e3799;
}

header p {
    color: #636e72;
    margin-bottom: 25px;
}

.phase-selector, .set-selector, .system-selector {
    display: flex;
    background: #dfe6e9;
    padding: 5px;
    border-radius: 30px;
    margin-bottom: 20px;
    gap: 5px;
}

.phase-btn, .set-btn, .system-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: bold;
    color: #636e72;
    transition: all 0.3s;
}

.phase-btn.active, .set-btn.active, .system-btn.active {
    background: white;
    color: #1e3799;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.controls {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
}

.rotation-btn {
    width: 45px;
    height: 45px;
    border: 2px solid #dfe6e9;
    background-color: white;
    color: #2d3436;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
    font-weight: bold;
}

.rotation-btn.active {
    background-color: #1e3799;
    color: white;
    border-color: #1e3799;
}

.court-container {
    position: relative;
    margin: 0 auto;
}

canvas {
    background-color: #f6b93b; /* Terrain plus vif */
    border: 6px solid #e58e26;
    border-radius: 4px;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 15px;
    font-size: 0.85em;
    font-weight: 500;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.s { background-color: #e67e22; }
.dot.oh { background-color: #0984e3; }
.dot.mb { background-color: #6c5ce7; }
.dot.opp { background-color: #d63031; }
.dot.l { background-color: #00b894; }

.info-panel {
    margin-top: 25px;
    padding: 20px;
    background-color: #f9f9fb;
    border-radius: 12px;
    text-align: left;
}

.action-btn {
    display: block;
    width: 100%;
    padding: 14px;
    background-color: #1e3799;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background 0.3s, transform 0.1s;
}

.action-btn:active {
    transform: scale(0.98);
}

.action-btn:hover {
    background-color: #0c2461;
}