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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #333;
}

#app {
    width: 100%;
    max-width: 800px;
    padding: 20px;
}

.screen {
    display: none;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.screen.active {
    display: block;
}

h1 {
    text-align: center;
    color: #4a5568;
    margin-bottom: 30px;
    font-size: 2.5em;
}

.lobby-controls {
    text-align: center;
    margin-bottom: 30px;
}

.input-group {
    margin: 15px 0;
}

.input-group input {
    padding: 12px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    width: 250px;
    margin: 5px;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    margin: 5px;
    transition: background 0.3s;
}

button:hover {
    background: #5a67d8;
}

button:disabled {
    background: #a0aec0;
    cursor: not-allowed;
}

.host-controls {
    margin: 20px 0;
}

#host-info {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    text-align: center;
}

#my-peer-id {
    font-family: monospace;
    background: #edf2f7;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
}

#player-list {
    margin-top: 20px;
}

#player-list h3 {
    margin-bottom: 15px;
    color: #4a5568;
}

#players {
    list-style: none;
    background: #f7fafc;
    border-radius: 8px;
    padding: 15px;
}

#players li {
    padding: 8px 12px;
    margin: 5px 0;
    background: white;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#players li.host {
    background: #fed7d7;
    border-left: 4px solid #f56565;
}

#players li.current-turn {
    background: #c6f6d5;
    border-left: 4px solid #48bb78;
}

/* Game Board Styles */
#game-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 15px;
    background: #f7fafc;
    border-radius: 8px;
}

#scores-display {
    flex: 1;
}

#scores-display h3 {
    margin: 0 0 10px 0;
    color: #4a5568;
    font-size: 16px;
}

#scores-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.score-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: white;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.player-color {
    font-size: 16px;
    font-weight: bold;
}

.player-color.red {
    color: #c53030;
}

.player-color.yellow {
    color: #ed8936;
}

.player-color.blue {
    color: #3182ce;
}

.player-color.green {
    color: #38a169;
}

.player-name {
    flex: 1;
    font-weight: 500;
}

.player-score {
    font-weight: bold;
    color: #667eea;
    background: #edf2f7;
    padding: 2px 8px;
    border-radius: 4px;
    min-width: 24px;
    text-align: center;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
    background: #2d3748;
    padding: 20px;
    border-radius: 15px;
    margin: 20px 0;
    box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.3);
    max-width: 420px;
    margin: 20px auto;
}

.cell {
    width: 60px;
    height: 60px;
    background: #1a202c;
    border-radius: 50%;
    border: 3px solid #4a5568;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cell:hover {
    border-color: #667eea;
    transform: scale(1.05);
}

.cell.disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.cell.red {
    background: radial-gradient(circle, #f56565 0%, #c53030 100%);
    border-color: #c53030;
    box-shadow: 0 0 15px rgba(245, 101, 101, 0.5);
}

.cell.yellow {
    background: radial-gradient(circle, #fbd38d 0%, #ed8936 100%);
    border-color: #ed8936;
    box-shadow: 0 0 15px rgba(251, 211, 141, 0.5);
}

.cell.blue {
    background: radial-gradient(circle, #63b3ed 0%, #3182ce 100%);
    border-color: #3182ce;
    box-shadow: 0 0 15px rgba(99, 179, 237, 0.5);
}

.cell.green {
    background: radial-gradient(circle, #68d391 0%, #38a169 100%);
    border-color: #38a169;
    box-shadow: 0 0 15px rgba(104, 211, 145, 0.5);
}

.cell.winning {
    animation: winning-pulse 1s infinite;
}

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

.cell.drop-animation {
    animation: drop 0.5s ease-out;
}

@keyframes drop {
    0% { transform: translateY(-300px); }
    60% { transform: translateY(10px); }
    80% { transform: translateY(-5px); }
    100% { transform: translateY(0); }
}

#game-status {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin: 20px 0;
    min-height: 25px;
}

#game-status.winner {
    color: #48bb78;
    font-size: 24px;
}

#game-status.draw {
    color: #ed8936;
    font-size: 24px;
}

#game-controls {
    text-align: center;
    margin-top: 20px;
}

#replay-btn {
    background: #48bb78;
    margin-right: 10px;
}

#replay-btn:hover {
    background: #38a169;
}

#leave-game-btn {
    background: #e53e3e;
}

#leave-game-btn:hover {
    background: #c53030;
}

#connection-status {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 15px;
    border-radius: 6px;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s;
}

#connection-status.connected {
    background: #c6f6d5;
    color: #2f855a;
    opacity: 1;
}

#connection-status.disconnected {
    background: #fed7d7;
    color: #c53030;
    opacity: 1;
}

#connection-status.connecting {
    background: #fef5e7;
    color: #c05621;
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    #app {
        padding: 10px;
    }

    .screen {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    .cell {
        width: 45px;
        height: 45px;
    }

    #game-board {
        gap: 6px;
        padding: 15px;
    }

    .input-group input {
        width: 200px;
    }
}