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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 1400px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

h1 {
    color: #333;
    font-size: 28px;
    font-weight: 700;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: #f5f5f5;
    border-radius: 20px;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ccc;
    animation: pulse 2s infinite;
}

.connection-status.connected .status-indicator {
    background: #4caf50;
}

.connection-status.connecting .status-indicator {
    background: #ff9800;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 14px;
    font-weight: 500;
    color: #666;
}

.main-content {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

/* 接続パネル */
.connection-panel {
    padding: 60px 40px;
}

.panel-content {
    max-width: 600px;
    margin: 0 auto;
}

.panel-content h2 {
    text-align: center;
    color: #333;
    margin-bottom: 40px;
    font-size: 32px;
}

.connection-options {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.option {
    text-align: center;
}

.option h3 {
    color: #555;
    margin-bottom: 20px;
    font-size: 20px;
}

.divider {
    text-align: center;
    color: #999;
    font-weight: 500;
    position: relative;
    margin: 10px 0;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: #ddd;
}

.divider::before {
    left: 0;
}

.divider::after {
    right: 0;
}

input[type="text"] {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    margin-bottom: 15px;
    transition: border-color 0.3s;
}

input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    padding: 15px 30px;
    transition: all 0.3s;
}

.primary-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.secondary-btn {
    background: #4caf50;
    color: white;
    width: 100%;
}

.secondary-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(76, 175, 80, 0.4);
}

.room-id-display {
    margin-top: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px dashed #667eea;
}

.room-id-display p {
    color: #555;
    margin-bottom: 10px;
    font-weight: 500;
}

.room-id-container {
    display: flex;
    gap: 10px;
    align-items: center;
}

.room-id-container code {
    flex: 1;
    padding: 12px 16px;
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    color: #667eea;
    letter-spacing: 2px;
}

.copy-btn {
    padding: 10px 16px;
    background: #667eea;
    color: white;
    font-size: 14px;
}

.copy-btn:hover {
    background: #5568d3;
}

.help-text {
    margin-top: 10px;
    font-size: 14px;
    color: #777;
}

/* キャンバスエリア */
.canvas-container {
    display: flex;
    flex-direction: column;
    height: 80vh;
    position: relative;
}

.toolbar {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-bottom: 2px solid #e0e0e0;
    flex-wrap: wrap;
    align-items: center;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-group label {
    font-weight: 500;
    color: #555;
    font-size: 14px;
}

input[type="color"] {
    width: 50px;
    height: 35px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
}

input[type="range"] {
    width: 120px;
}

.tool-btn {
    padding: 8px 16px;
    background: #667eea;
    color: white;
    font-size: 14px;
}

.tool-btn:hover {
    background: #5568d3;
}

.tool-btn.danger {
    background: #f44336;
}

.tool-btn.danger:hover {
    background: #da190b;
}

.room-info {
    margin-left: auto;
    display: flex;
    gap: 20px;
    align-items: center;
}

.room-id-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: #f0f4ff;
    border: 1px solid #667eea;
    border-radius: 8px;
}

.room-id-badge code {
    font-size: 12px;
    font-weight: 600;
    color: #667eea;
    letter-spacing: 0.5px;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.copy-btn-small {
    padding: 4px 8px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.3s;
}

.copy-btn-small:hover {
    background: #5568d3;
}

.participants {
    font-weight: 500;
    color: #555;
}

#canvas {
    flex: 1;
    background: white;
    cursor: crosshair;
    display: block;
}

/* カーソル表示 */
.cursors {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.remote-cursor {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: all 0.05s linear;
    border: 2px solid white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

/* レスポンシブ */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    h1 {
        font-size: 22px;
    }

    .toolbar {
        gap: 10px;
    }

    .tool-group {
        flex-wrap: wrap;
    }

    .room-info {
        margin-left: 0;
        width: 100%;
        flex-direction: column;
        gap: 10px;
    }

    .room-id-badge code {
        max-width: 150px;
        font-size: 10px;
    }

    .participants {
        margin-left: 0;
        width: 100%;
    }

    .connection-panel {
        padding: 30px 20px;
    }
}